Papers - YAMADA Takahiro
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An Arbitrary Lagrangian-Eulerian Finite Element Method for Incompressible Hyperelasticity
Takahiro Yamada and Fumio Kikuchi
Computer Methods in Applied Mechanics and Engineering 102 ( 2 ) 149 - 177 1993.1 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：Elsevier Joint Work
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Simultaneously iterative procedure based on block Newton method for elastoplastic problems
Yamamoto Takeki, Yamada Takahiro, Matsui Kazumi
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING 122 ( 9 ) 2145 - 2178 2020.12 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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超弾性体の大変形有限要素解析への創成解の方法の適用
山田貴博
土木学会論文集A2分冊（応用力学） 72 ( 2 ) I_319 - I_326 2016.12 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：土木学会 Single Work
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METHOD OF NEARBY PROBLEMS FOR LARGE DEFORMATION ANALYSIS OF NEARLY INCOMPRESSIBLE HYPERELASTICITY
YAMADA Takahiro
Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 74 ( 2 ) I_265 - I_275 2018 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers Single Work
The method of nearby problems (MNP) developed by Roy et al. is a sophisticated verification procedure, in which the problems with exact solutions near the target problem of interest can be generated by a curve fitting of a numerical solution to a continuous function. In this work, we apply this approach to large deformation problems of nearly incompressible hyperelasticity. Nearby solutions are constructed by the projection of a finite element solution of displacement onto an approximating function space using the inner product in the Sobolev space <i>H</i><sub>1</sub>. In this projection, a penalty term associated with volumetric deformation is introduced to impose the nearly incompressible property on nearby solutions.
Other Link： https://ci.nii.ac.jp/naid/130007583966
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超弾性体の大変形問題に対する圧力安定化四面体1次要素
山田貴博
土木学会論文集A2分冊（応用力学） 73 ( 2 ) I_405 - I_415 2017.12 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：土木学会 Single Work
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A quadrilateral shell element with degree of freedom to represent thickness-stretch
T. Yamamoto, T. Yamada and K. Matsui
Computational Mechanics 59 625 - 646 2017.4 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：Springer Joint Work
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Large deformation analysis of elastic rod by an arbitraty Lagrangian Eulerian finite element method
Transactions of JSCES 7 191 - 198 2005.1 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Single Work
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Numerical procedure to couple shell to solid elements by using Nitsche's method
COMPUTATIONAL MECHANICS 63 ( 1 ) 69 - 98 2019.1 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Springer Joint Work
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Frictionless Contact Procedure for Finite Cover Method using Nitsche's Method
TSUKINO Makoto, YAMADA Takahiro
Transactions of the Japan Society for Computational Engineering and Science 2019 ( 0 ) 20190010 - 20190010 2019.6 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPAN SOCIETY FOR COMPUTATIONAL ENGINEERING AND SCIENCE Joint Work
The voxel-based FEM is an efficient numerical procedure to deal with complex geometries. It is difficult to analyze models containing contact conditions by this procedure, in which surfaces of objects are represented as stepwise shapes. In the voxel modeling based on the finite cover method (FCM), geometry is defined by using surface modeling procedures such as polyhedrons and the level set method instead of voxel representation and hence contact problems can be set more easily. In this paper, a contact algorithm for the FCM is proposed. The penalty method is widely used for contact constraint, and then a large penalty parameter, which needs to be employed to assure accuracy, may cause numerical instability. Moreover, in the FCM, it is difficult to manage positions of integration points for contact constraints and inaccurate distribution of contact stress may be obtained due to an over-constraint with concentration of integration points. In this paper, the Nitsche's method is applied to contact constraint in the FCM in order to circumvent difficulties arising in the penalty method. To show effectiveness of our approach, we calculate several 2D frictionless contact problems.
Other Link： https://ci.nii.ac.jp/naid/130007665858
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YAMADA Takahiro
Transactions of the Japan Society for Computational Engineering and Science 2024 ( 0 ) 20240002 - 20240002 2024.2 [Reviewed]
Authorship：Lead author, Last author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPAN SOCIETY FOR COMPUTATIONAL ENGINEERING AND SCIENCE Single Work
<p>This study discusses the numerical properties of finite element procedures for eigenvalue analysis of free vibration in elastic solid structures. Exact solutions for a three-dimensional rectangular domain with the slip boundary condition, in which stationary P and S wave modes can be obtained separately, were adopted for comparison with numerical solutions. The distributions and numerical errors of the eigenvalues obtained by different finite element schemes were characterized in detail. Numerical performance was evaluated by utilizing particular stationary P and S wave modes in the cylindrical domain.</p>
Other Link： https://www.jstage.jst.go.jp/article/jsces/2024/0/2024_20240002/_article/-char/ja
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Elastoplastic analysis of shells without any local iterative calculations by block Newton method
Yamamoto, T; Yamada, T; Matsui, K
COMPUTATIONAL MECHANICS 72 ( 5 ) 967 - 989 2023.11 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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Yamamoto Takeki, Yamada Takahiro, Matsui Kazumi
COMPUTATIONAL MECHANICS 71 ( 6 ) 1081 - 1091 2023.3 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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SPLITTING TIME INTEGRATOR FOR DYNAMIC PROBLEMS OF NEARLY INCOMPRESSIBLE ELASTICITY
YAMADA Takahiro
Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 77 ( 2 ) I_217 - I_225 2021.12 [Reviewed]
Authorship：Lead author, Last author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers Single Work
<p>Explicit time integrators are suitable for wave propagation phenomena. If they are applied to the transient analysis of nearly incompressible materials such as rubber-like materials, it is necessary to use a small time step size determined from the speed of wave propagation of the volumetric deformation component with high stiffness. In this paper, the Rattle method for the constrained Hamiltonian problem is extended to develop a novel splitting time integrator for nearly incompressible elasticity.</p>
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Application of block Newton method to elastoplastic problems under plane stress state
YAMAMOTO Takeki, YAMADA Takahiro, MATSUI Kazumi
transactions of JSCE 2021 ( 0021 ) 1 - 11 2021.11 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPAN SOCIETY FOR COMPUTATIONAL ENGINEERING AND SCIENCE Joint Work
<p>The simultaneously iterative procedure for elastic-plastic boundary value problems proposed by the authors is extended to elastoplastic problems under plane stress state. The authors define a coupled problem of the equilibrium equation, the yield equation, and the plane stress condition at every material points, and develop a numerical procedure based on the block Newton method to solve them with simultaneous linearization. In the proposed block Newton method, the tangent moduli can be constructed algebraically by eliminating the internal variables, which are also updated algebraically without local iterative calculation. In addition, the residuals of yield criterion and plane stress state are incorporated into the linearized equilibrium equation. Hence, the proposed procedure enables us to decrease the residuals in the coupled boundary value problems simultaneously. Some numerical examples illustrate the validity and the effectiveness of the procedures under plane stress state with material nonlinearity.</p>
Other Link： https://www.jstage.jst.go.jp/article/jsces/2021/0/2021_20210021/_article/-char/ja/
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APPLICATION OF SPLITTING TIME INTEGRATOR FOR DYNAMIC PROBLEM OF MINDLIN-REISSNER PLATE
YOSHIYA Kazuya, YAMADA Takahiro
Japanese Journal of JSCE 81 ( 15 ) n/a 2025.2 [Reviewed]
Authorship：Last author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers Joint Work
<p> In this work, the mixed finite element method, in which the transverse shear stresses are taken as unknown variables, is applied to dynamic problems of the Mindlin–Reissner plate. The splitting time integrator that works as an explicit method for bending deformation and as an implicit method for transverse shear deformation is adopted. The proposed approach relaxes the restriction on the time interval of an explicit method for plate bending problems by employing an implicit scheme targeted at only the minor transverse shear deformation. Numerical experiments demonstrated that the proposed approach exhibits superior numerical properties compared to conventional time integrators in terms of time interval and accuracy.</p>
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Yamamoto, T; Yamada, T; Matsui, K
ENGINEERING COMPUTATIONS 41 ( 6 ) 1484 - 1506 2024.8 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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CREDIBILITY ASSESSMENT IN BENDING TEST OF WOOD BASED ON ASME V&V-40
NATSUMEDA Chikako, FUKUTANI Yuki, YUKAWA Hidefumi, TANIDA Sato, TAKAHASHI Yuka, MASUDA Yusei, MATSU … Show more authors
NATSUMEDA Chikako, FUKUTANI Yuki, YUKAWA Hidefumi, TANIDA Sato, TAKAHASHI Yuka, MASUDA Yusei, MATSUI Kazumi, KURATA Kazuyuki, MIURA Takahiro, TSUZUKI Arata, YAMAMOTO Takeki, SUGIYAMA Hirofumi, WATANABE Dai, LYU Xuelong, YAMADA Takahiro Hide authors
Japanese Journal of JSCE 80 ( 15 ) n/a 2024.2 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers Joint Work
<p>In this study, we propose a credibility factor to evaluate the credibility of material model and its parameters calibrated from material tests, based on the concept of credibility evaluation of simulation models presented in ASME V&V-40. In solid simulations, it is common to identify material parameters so as to reproduce the response obtained in material tests, so the reproducibility of this response alone is not sufficient to evaluate the credibility of the simulation model. This paper proposes a new credibility factor and its gradations, checking the reproducibility of responses that are not used for parameter identification. Using 4-point bending tests on plastic materials and wood as examples, we will show the difference in credibility evaluation for calibrated model that only identify parameters and one that confirm the reproducibility of other responses.</p>
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Elastoplastic damage analysis with algebraic derivation of consistent tangent by block Newton method
YAMAMOTO Takeki, YAMADA Takahiro, MATSUI Kazumi
Transactions of the JSME (in Japanese) 90 ( 936 ) 24-00081 - 24-00081 2024 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers Joint Work
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Numerical Analysis of Asymptotic Behavior in Dynamic Problems of Nearly Incompressible and Incompressible Elasticity
Yamada Takahiro
NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan 66 ( 0 ) 23 2022
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：National Committee for IUTAM Single Work
<p>Asymptotic behaviors of nearly incompressible and incompressible elasticity in dynamic problems are analyzed by the novel finite element procedure, which is designed for nearly incompressible media and can be applied to incompressible ones. Numerical results indicate that nearly incompressible media can be approximated by incompressible ones.</p>
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Thermal-Structural Simulation for Sintering Ceramics
Natsumeda Chikako, Matsui Kazumi, Tatami Junichi, Yamada Takahiro
NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan 66 ( 0 ) 21 2022
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：National Committee for IUTAM Joint Work
<p>In this paper, a simple simulation strategy for sintering ceramics is proposed as thermal-structural problems. Assuming that thermal and mechanical deformations are independent, the total deformation is decomposed into thermal and mechanical component, and they are also decomposed into reversible and irreversible components. For the thermal irreversible strain, Master Sintering Curve is employed, and Peric's viscoplasticity model is used for the mechanical irreversible strain. The model is introduced into ANSYS, thermal-structural analysis with User Programmable Feature (UPF). The simulation is validated by comparing with sintering experiment with/without external axial compression load.</p>
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YAMAMOTO Takeki, YAMADA Takahiro, MATSUI Kazumi
Transactions of the JSME (in Japanese) 88 ( 912 ) 22-00150 - 22-00150 2022 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers Joint Work
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Splitting Time Integrator for Transient Analysis of Nearly Incompressible Elasticity
YAMADA Takahiro
The Proceedings of The Computational Mechanics Conference 2022.35 ( 0 ) 1-05 2022
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers Single Work
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IWATA Tomoyuki, YAMADA Takahiro, FUJIWARA Motohide, IHATA Tomoaki, OKADA Kazuya
Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 77 ( 2 ) I_163 - I_170 2021.12 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers Joint Work
<p>The response of stress of hiperselastic materials such as rubber generally exhibits complex non-linear behavior. Although the conventional identification of the material constants are carried out by using results of three types biaxial material tests, the results of stress analysis using these identified material parameters are not always satisfactory in accuracy. In this study, a novel methodorogy for identification of material parameters is proposed, which incorporates the importance evaluation of results of material testings in material constants by considering the deformation state appearing in stress analysis of target problems and the effectiveness of the proposed method is evaluated by numerical experiments.</p>
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Simulation of sintering ceramics based on Master Sintering Curve
NATSUMEDA Chikako, MATSUI Kazumi, TATAMI Junichi, YAMADA Takahiro
Transactions of the JSME (in Japanese) 87 ( 902 ) 1 - 10 2021 [Reviewed]
Authorship：Last author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers Joint Work
<p>In this paper, a simple simulation strategy for sintering ceramics is proposed by referring to the experimental results of the deformation profile obtained from a thermomechanical analysis (TMA) under uniaxial compression loads. Assuming that mechanical and thermal deformations are independent, the total deformations are decomposed into mechanical and thermal components, and each deformation component is divided into reversible and irreversible deformations. The thermal and mechanical reversible deformations are represented by the commonly accepted models, namely thermal expansion and linear elasticity. For the thermal irreversible strain (sintering strain), the Master Sintering Curve (MSC), which considers microscopic thermodynamics from a macroscopic perspective, is employed. This facilitates the prediction of any densification evolution without stress and decreases the number of experiments required for parameter fittings. The viscoplasticity model is used for the mechanical irreversible strain to represent the creep deformation in sintering ceramics under stress. In this model, the temperature dependence of the viscosity parameter and density dependence of the yield stress are introduced. The sintering simulation was performed by installing a model with a User Programmable Feature (UPF) into ANSYS thermal–structural analysis. The simulations were validated by comparing the simulation deformation profiles with other sintering experiments under uniaxial compression loads that were not used for the modeling.</p>
Other Link： https://ci.nii.ac.jp/naid/130008094638
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Makiyama Kazuhide, Osaka Kimito, Araki Azumi, Ohtake Shinji, Tatenuma Tomoyuki, Nagasaka Manabu, Ya … Show more authors
Makiyama Kazuhide, Osaka Kimito, Araki Azumi, Ohtake Shinji, Tatenuma Tomoyuki, Nagasaka Manabu, Yamada Takahiro, Yao Masahiro Hide authors
ASIAN JOURNAL OF ENDOSCOPIC SURGERY 14 ( 3 ) 504 - 510 2020.11 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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YAMADA Takahiro
Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 76 ( 2 ) I_259 - I_267 2020.11 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers Single Work
In this paper, the verification of a free vibration analysis of elasticity is discussed. An eigenvalue problem possessing solvable solutions is proposed for verification of the code and evaluation of numerical properties in real calculations. A homogenous and isotropic elastic material and cylindrical domain are employed and stationary modes of P-wave are considered as specific eigenmodes of vibration. A process to compare numerical solutions and exact ones proposed in this work is also presented and numerical properties of several finite element approximations are investigated.
Other Link： https://ci.nii.ac.jp/naid/130007980145
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TSUKINO Makoto, YAMADA Takahiro
Transactions of the Japan Society for Computational Engineering and Science 2020 ( 0 ) 20200021 - 20200021 2020.11 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPAN SOCIETY FOR COMPUTATIONAL ENGINEERING AND SCIENCE Joint Work
<p>It is essential to deal with contact problems in assembly analyses of mechanical components. However, the usual voxel-based FEM with consideration of contact conditions often exhibits numerical difficulties. In this paper, a practical procedure for 3D frictionless contact in the voxel-based FEM using the EBE-PCG method based on the finite cover method (FCM) is proposed. To assure accuracy in the penalty method for contact conditions, a large penalty parameter, which causes numerical instability and convergence deterioration in iterative linear solvers, is required. In this paper, the Nitsche's method is applied to contact constraint in the FCM to circumvent such difficulties. Moreover, the ghost penalty is employed to alleviate instability caused by elements with minuscule volume fraction in the FCM. A multi-phased analysis using different voxel size is also proposed to accelerate calculation. To show the effectiveness of the present approach, we calculate basic and practical 3D contact problems.</p>
Other Link： https://ci.nii.ac.jp/naid/130007937679
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Yamamoto Takeki, Yamada Takahiro
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING 121 ( 9 ) 2001 - 2032 2019.12 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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Elastic buckling of cylindrical shell under pressure load evaluated on surface
YAMAMOTO Takeki, YAMADA Takahiro
Mechanical Engineering Journal 6 ( 4 ) 19-00113 2019.6 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：一般社団法人 日本機械学会 Joint Work
This paper presents a numerical procedure using shell element to evaluate the buckling behavior of the cylindrical structure subjected to pressure load. In numerical simulation for pressure vessels using conventional shell elements, the pressure loads imposed to both top and bottom surfaces are expressed as the difference between the internal and external pressures. In this work, the special shell element, in which the surface traction is exactly expressed at the surface, is applied to the buckling analysis. In this approach, the distribution of the transverse normal stress through the thickness can be evaluated. Therefore, the influence of the difference between the internal and the external pressures to the behavior of the buckling of the cylindrical shell structures can be assessed. In the situation that a perturbative load is applied under a certain stress state, bifurcation points are searched by solving a standard eigenvalue problem. Several numerical examples are presented to examine the effectiveness of the proposed approach. The buckling behavior that cannot be considered with the conventional shell elements can be observed by this approach.
Other Link： https://ci.nii.ac.jp/naid/130007662398
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On application of numerical verification procedures to commercial codes in solid mechanics
YAMADA Takahiro
The Proceedings of The Computational Mechanics Conference 2019 ( 0 ) 2019
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers Single Work
<p>In this paper, we apply numerical verification procedures proposed by the authors to finite element analyses using commercial codes. We consider contact problems of elastic bodies and employ the method of nearby problems. The nearby solutions are constructed for each body by the projection of the original finite element solution onto function space of spline using the inner product in the Sobolev space <i>H</i><sup>1</sup>. Equivalent nodal force vectors associated with external forces can be derived directly from the nearby solutions by the weak formulation. The numerical solution of the nearby problems is compared with that of the original one and we confirm that the traction force of the nearby problem causes the similar deformation to that given by the original contact problem.</p>
Other Link： https://ci.nii.ac.jp/naid/130007817373
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YAMAMOTO Takeki, YAMADA Takahiro, MATSUI Kazumi, SAIKI Isao
Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 74 ( 2 ) I_147 - I_158 2018 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers Joint Work
In the finite element analysis, it is important to evaluate the local behavior at the portion where the thickness is discontinuous or near the corners. If such structure is discretized with structural elements, the numerical results are often unreliable, because the plane stress condition is assumed in the transverse direction and the incompressibility could not be considered appropriately. Thus, the authors proposed that the effective procedure of discretizing the model is to connect shell and solid elements properly by using Nitsche's method.<br>When the different types of elements are connected at the boundary including corners, the stiffness near such boundary may become larger than that of the model discretized with only one type of element. Thus, the authors propose the approach to avoid this problem by improving the mesh geometry near the boundary.<br>The proposed procedure can be applied to the elastoplastic problems, but it is necessary to divide the domain so that the plastic region does not progress on the connecting interface. This is because the numerical calculation becomes unstable due to the disorder of the stress state when discontinuous stress state is connected.<br>This paper presents a numerical procedure for connecting shell and solid elements in elastoplastic problems. In the proposed approach, shell and solid elements can be coupled with reasonable deformation near the connecting interface, only when the plastic range is not included on the connecting interface.
Other Link： https://ci.nii.ac.jp/naid/130007584949
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A Study on Numerical Evaluation of Instability for Cylindrical Structures under Pressure Loading
YAMAMOTO Takeki, YAMADA Takahiro, SAIKI Isao
The Proceedings of The Computational Mechanics Conference 2018 ( 0 ) 2018
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers Joint Work
<p>This paper presents a numerical procedure to evaluate the buckling of cylindrical structures under pressure load with shell element appropriately. In a situation where the internal and external pressures are subjected to the top and bottom surfaces of cylindrical shells, it is difficult to evaluate the influence of the pressure load of the structure appropriately, due to the complicated loading conditions. Numerical solutions, which are obtained by using conventional shell elements, and analytical solutions are expressed by using the difference between the internal and the external pressures as the external force. On the other hand, solid elements can be employed to model the loading conditions properly, but huge computational cost may be required. In this work, the authors propose a numerical procedure for buckling analysis that evaluates the pressure load appropriately in the framework of the structural elements.</p>
Other Link： https://ci.nii.ac.jp/naid/130007653576
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Large Deformation Analysis of Elastic Membrane by Using Volumetric Discretization
YAMADA Takahiro
The Proceedings of The Computational Mechanics Conference 2018 ( 0 ) 2018
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers Single Work
In this paper, we propose a numerical procedure for large deformation problems of elastic membrane for surgical simulators. We employ Level Set method for geometrical representation of structures. Displacement fields is approximated by using the spline basis function with rectangular grid. We discuss validity of this technique by comparing the conventional Lagrangian technique.
Other Link： https://ci.nii.ac.jp/naid/130007653799
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Ductile fracture simulation under multi-axial loading
SUGIYAMA Hirofumi, MATSUI Kazumi, YAMADA Takahiro, OKAZAWA Shigenobu
The Proceedings of The Computational Mechanics Conference 2018 ( 0 ) 2018
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers Joint Work
<p>In this paper, ductile fracture simulation under the multiaxial loading is examined. Ductility of the material is considered by damage model, moreover, crack propagation is described by the finite cover method. Predicting the crack propagation phenomena about the metal material is necessary for the engineering field. Finite element method (FEM) is widely used to predict the metalworking and fracture process involves necking, crack, and failure. However, FEM is not good at predicting crack propagation. The generalized finite element method is good at describing discontinuous field like a fracture. Finite cover method(FCM), which defines the multiple covers, is one of the candidates to describe the discontinuous deformation. Moreover, a lot of constitutive equation has devised in order to deal with complex material behavior. Though there are many material constants, they sometimes have no physical meaning. In this study, a simplified Lemaitre model with FCM is employed to crack propagation simulation under multi-axial loading by applying different combinations of normal and transverse loads to the model. Some respective examples show the result of crack propagation and examine the effect of the multi-axial loading.</p>
Other Link： https://ci.nii.ac.jp/naid/130007653792
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Nitsche法を用いたシェル要素とソリッド要素の接合
山本剛大, 山田貴博, 松井和己
土木学会論文集A2分冊（応用力学） 73 ( 2 ) I_177 - I_187 2017.12 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：土木学会 Joint Work
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Comparison of the performance of experienced and novice surgeons: measurement of gripping force during laparoscopic surgery performed on pigs using forceps with pressure sensors
A. Araki, K. Makiyama, H. Yamanaka, D. Ueno, K. Osaka, M. Nagasaka, T. Yamada and M. Yao
Surgical Endoscopy 31 1999 - 2005 2017 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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き裂進展のための体積ロッキングを回避した有限被覆法の開発
杉山裕文,松井和己,山田貴博
日本計算工学会論文集 2016 20160021 2016 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本計算工学会 Joint Work
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Nitsche 法に基づくはり要素とソリッド要素の接続手法
山田貴博, 仲田光秀
土木学会論文集A2分冊（応用力学） 71 ( 2 ) I_319 - I_326 2015.12 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：土木学会 Joint Work
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Development of Shell Element with Thickness Stretch
Takeki Yamamoto, Takahiro Yamada and Kazumi Matsui
Transactions of JSCES 2015 20150004 2015.4 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Computational Science and Engineering Joint Work
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Hiroyuki Yamanaka,Kazuhide Makiyama,Kimito Osaka, Manabu Nagasaka, Masato Ogata, Takahiro Yamada an … Show more authors
Hiroyuki Yamanaka,Kazuhide Makiyama,Kimito Osaka, Manabu Nagasaka, Masato Ogata, Takahiro Yamada and Yoshinobu Kubota Hide authors
Advances in Urology 2015 2015.2 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：Hindawi Publishing Corporation Joint Work
Other Link： http://www.hindawi.com/journals/au/2015/495308/
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STRESS ANALYSIS BY FINITE ELEMENT PROCEDURE FOR OVERLAPPING MESHES BASED ON DOMAIN DECOMPOSITION APPROACH
Tatsuya Watanuki, Takahiro Yamada and Kazumi Matsui
Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 70 ( 2 ) I_255 - I_264 2014.12 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers Joint Work
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スプラインによる特性 Galerkin 法における Nitsche の方法に基づく境界組み込み手法
木村達也, 丸岡晃, 山田貴博, 松井和己
土木学会論文集A2分冊（応用力学） 69 ( 2 ) I_87 - I_94 2013.12 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：土木学会 Joint Work
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非圧縮性流れにおける混合型 B スプライン近似に基づく特性ガラーキン法
丸岡 晃, 山田貴博
土木学会論文集A2分冊（応用力学） 68 ( 2 ) I_149 - I_160 2012.12 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：土木学会 Joint Work
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移流拡散問題におけるBスプライン基底関数を用いた特性ガラーキン法
丸岡 晃, 山田貴博
日本計算工学会論文集 2012 20120001 2012.1 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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背景直交格子を用いた領域分割型重合メッシュ有限要素法
山田貴博，落合亮，松井和己
土木学会論文集A2分冊（応用力学） 67 ( 2 ) I_117 - I_125 2011.12 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：土木学会 Joint Work
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マーカ積分有限要素法による準静的大変形解析
山田貴博, 松井和己
第21回計算力学講演会CD-ROM講演論文集 2009.11
Language：Japanese Publishing type：Research paper (other science council materials etc.) Publisher：日本計算工学会 Joint Work
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Marker Integration Eulerian Finite Element Method for Large Deformation Problems of Solid
15th International Conference on Finite Elements in Flow Problems, Abstracts 116 2009.4
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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On Properties of Numerical Procesures Based on Galerkin Method for Wave Equation
Journal of Applied Mechanics JSCE 11 117 - 121 2008.9 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers Single Work
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CHARACTERISTIC GALERKIN FINITE ELEMENT METHOD WITH MARKER PARTICLE INTEGRATION FOR METAL FORMING
Proceedings of 8th World Congress on Computational Mechanics 2008.6
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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マーカ積分有限要素法による準静的弾塑性解析
山田貴博, 松井和己
第57回理論応用力学講演会講演論文集 611 - 612 2008.6
Language：Japanese Publishing type：Research paper (other science council materials etc.) Joint Work
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波動方程式に対する数値計算スキーム設計について
計算工学講演会論文集 13 31 - 34 2008.5
Language：Japanese Publishing type：Research paper (other science council materials etc.) Single Work
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On Block Newton Procedure for Nonlinear Multiscale Problem of Solid
APCOM'07 - EPMESC XI abstracts 149 2007.12
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Formulation and Algorithm for Nonlinear Multiscale Problem of Solid Based on Block Newton Method
9th USNCCM, CD-ROM Conference Proceedings 2007.7
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Marker integration characteristic Galerkin finite element method for hyperelasticity
ICCM 2007 Conference Abstract 288 2007.4
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Characteristic Galerkin finite element method using marker particle for large deformation analysis of solid
Computational Methods, G.R.Liu, V.B.C. Tan, X. Han (Eds) 645 - 651 2006.12 [Reviewed]
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Numerical Procedure for Interaction Problem of Membrane and Fluid by using Conserving Time Integrator
Journal of Applied Mechanics JSCE 9 291 - 298 2006.8 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers Joint Work
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Numerical Procedure for Interaction Problem of Largely Deformed Membrane and Fluid
CD-ROM proceedings, 2006 ASME Pressure Vessels and Piping/ICPVT-11 Conference 2006.8 [Reviewed]
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Numerical properties of high order finite elements for wave equations
CD-ROM procedings, 7th World Congress on Computational Mechanics 2006.7
Language：English Publishing type：Research paper (international conference proceedings) Single Work
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Iterative Algorithms for Computing the Averaged Response of Nonlinear Composites under Stress-Controlled Loadings
International Journal for Multiscale Computational Engineering 4 ( 4 ) 475 - 486 2006 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Single Work
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Three-Dimensional Finite Element Modeling for Concrete Materials Using Digital Image and Embedded Discontinuous Element
International Journal for Multiscale Computational Engineering 4 ( 4 ) 461 - 474 2006 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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Image-based distinct Element Modeling of Granular Material with Irregular Shapes
Journal of Applied Mechanics JSCE 8 541 - 548 2005.8 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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Characteristic Galerkin Finite Element Method with Marker Particle Integration for Large Deformation Problem of Solid
Journal of Applied Mechanics JSCE 8 319 - 326 2005.8 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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Eulerian Finite Element Method for Solid based on Characteristic Galerkin Method with Marker Particles
Satoshi Ishii, Kazumi Matsui
8th USNCCM, CD-ROM Conference Proceedings 2005.7 [Reviewed]
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Efficient finite element procedure for image-based material simulations
Book of Abstracts, International Workshops on Advances in Computaional Mechanics 68 2004.11
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Numerical study on isolated equilibrium path of rod by ALE finite element method
Proceedings CD-ROM, 4th Europian Congress on Computational Methods in Applied Sciences and Engineering 2004.7 [Reviewed]
Language：English Publishing type：Research paper (international conference proceedings) Single Work
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不連続要素と等値面の再構成手法を用いた粒子分散型２相材料の３次元イメージベース有限要素モデリング
永井学志、渡邊勝彦
日本機械学会論文集（A編） 70 ( 691 ) 84 - 91 2004.3 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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Interval estimation of time-history response without use of direct time integration
Proceedings of 2nd MIT Conference on Computational Fluid and Solid Mechanics 509 - 512 2003.6 [Reviewed]
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Initial Shape Determination of Largely Deformed Elastic Membrane
CD-ROM Conference Proceedings, 7th USNCCM 2003
Language：English Publishing type：Research paper (international conference proceedings) Single Work
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An Arbitrary Lagrangian Eulerian Finite Element Method for Elastic Membrane
Journal of Applied Mechanics, JSCE 5 161 - 166 2002.9 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Single Work
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Large Deformation Analysis of Membrane and Rod by ALE Finite Element Method
Book of Abstratcs II, Fifth World Congress on Computational Mechanics 388 2002
Language：English Publishing type：Research paper (international conference proceedings) Single Work
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ALE Finite Element Method for Membrane and Rod
USNCCM VI, Abstracts 604 2001.7
Language：English Publishing type：Research paper (international conference proceedings) Single Work
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コンクリート材料のメソスケール解析のための高速な数値計算法
永井学志
応用力学論文集 3 177 - 184 2000.9 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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Mesoscopic Simulation of Concrete Materials on PC Cluster
Book of Abstract, ECCOMAS 2000 1000 2000.9
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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階層型デジタル画像に基づく粗骨材－モルタル界面を考慮したコンクリート材料の非線形有限要素解析手法
永井学志, 和田章
日本建築学会構造系論文集 ( 528 ) 91 - 98 2000 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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Accurate Modeling and Fast Solver for the Strress Analysis of Concrete Material Based on Digital Image Processing Technique
International Journal for Computational Civil and Structural Engineering 1 ( 2 ) 46 - 56 2000 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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非圧縮体に対するMINI要素の数値安定性
山田貴博
応用力学論文集 2 201 - 209 1999.9 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Single Work
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On Fast Iterative Solvers for Image-Based Finite Element Method
5th U.S. National Congress on Computational Mechanics, Book of Abstracts 273 1999.8
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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コンクリート材料の圧縮破壊のイメージベース有限要素解析
永井学志，和田章
コンクリート工学年次論文報告集 21 ( 3 ) 157 - 162 1999.7 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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On Fast Iterative Solvers for Image-Based Finite Element Method
USNCCM99, Book of Abstracts 273 1999.7
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Lagrangian Finite Element Method and Symplectic Integrator for Free Boundary Problem of Incompressible Fluid
Advances in Numerical Mathematics; Proceedings of the Fourth Japan-China Joint Seminar on Numerical Mathematics 145 - 154 1999 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Single Work
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Stress Analysis of Concrete Material Based on Geometrically Accurate Finite Element Modeling
Fracture Mechanics of Concrete Structures 2 1077 - 1086 1998.10 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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Finite Element Procedure of Initial Shape Determination for Hyperelasticity
Structural Engineering and Mechanics 6 ( 2 ) 173 - 183 1998.9 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Single Work
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A Bubble Element for the Compressible Euler Equations
International Journal for Computational Fluid Dynamics 9 273 - 283 1998.8 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Single Work
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3次元実画像データに基づくコンクリート材料の有限要素解析手法
永井学志，和田章
日本建築学会構造系論文集 509 77 - 82 1998.7 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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Finite Element Analysis Of Concrete Material Based On The 3-Dimensional Real Image Data
Fourth World Congress on Computational Mechanics, Abstracts 1 590 1998.6
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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A Bubble Element for Compressible and Incompressible Viscous Fluid
Fourth World Congress on Computational Mechanics, Abstracts 2 590 1998.6
Language：English Publishing type：Research paper (international conference proceedings) Single Work
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Scaled Bubble Element for Compressible and Incompressible Fluid
Fourth Japan-US Symposium on Finite Element Methods in Large-Scale Computational Fluid Dynamics, Proceedings 109 - 114 1998.4
Language：English Publishing type：Research paper (international conference proceedings) Single Work
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１階両外柱の模型実験を含んだRC造高層建築物の静的パラレル実験解析
市橋重勝，坂田弘安，林靜雄，和田章
日本建築学会構造系論文集 499 93 - 100 1997.9 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work