SHIBUTANI Tadahiro

Affiliation

Institute of Advanced Sciences

Job Title

Professor

Research Fields, Keywords

Strength of Materials, Fracture Mechanics, Safety Engineering, Risk Management

Mail Address

E-mail address

Web Site

https://smms.ynu.ac.jp/

Related SDGs




The Best Research Achievement in Research Career 【 display / non-display

The Best Research Achievement in the last 5 years 【 display / non-display

  • 【Published Thesis】 IoT-Based Prognostics and Systems Health Management for Industrial Applications  2016.07

    【Published Thesis】 Benchmark Analyses on the Elastic-Plastic Behavior of Carbon Steel Pipes Under Seismic Load  2020.04

    【Published Thesis】 Potential failure mode identification of operational amplifier circuit board by using high accelerated limit test  2018.06

    【Book】 Mitigating Tin Whisker Risks: Chapter 9 Mechanically induced tin whiskers  2016.06

    【Published Thesis】 Verification of appropriate life parameters in risk and reliability quantifications of process hazards  2019.07

Graduating School 【 display / non-display

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    1996

    Kyoto University   Faculty of Engineering   Department of Engineering of Physics   Graduated

Graduate School 【 display / non-display

  •  
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    2000

    Kyoto University  Graduate School, Division of Engineering  Department of Engineering Physics and Mechanics  Doctor Course  Completed

Degree 【 display / non-display

  • Doctor of Engineering -  Kyoto University

Campus Career 【 display / non-display

  • 2019.10
    -
    Now

    Duty   Yokohama National UniversityInstitute of Advanced Sciences   Center for Creation of Symbiosis Society with Risk   Professor  

  • 2019.04
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    2019.09

    Duty   Yokohama National UniversityInstitute of Advanced Sciences   Center for Creation of Symbiosis Society with Risk   Associate Professor  

  • 2015.10
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    2019.03

    Duty   Yokohama National UniversityCenter for Creation of Symbiosis Society with Risk   Associate Professor  

  • 2014.04
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    2015.09

    Duty   Yokohama National UniversityCenter for Risk Management and Safety Sciences   Associate Professor  

  • 2009.04
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    2014.03

    Duty   Associate Professor  

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External Career 【 display / non-display

  • 2012.08
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    2014.07

    Senior Scientific Research Specialist, MEXT  

  • 2007.03
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    2008.02

    University of Maryland   Visiting scholar  

Academic Society Affiliations 【 display / non-display

  • 1998
     
     
     

    Japan Society of Mechanical Engineering

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    Japan Society of Material Science

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    Japan Institute of Electronics Packaging

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    HPI

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    Japan Society for Safety Engineering

Field of expertise (Grants-in-aid for Scientific Research classification) 【 display / non-display

  • Social systems engineering/Safety system

  • Materials/Mechanics of materials

 

Research Career 【 display / non-display

  • Reliability of Micro Joints in Electronics Packaging

    Grant-in-Aid for Scientific Research  

    Project Year:  -   

  • Evaluation of Interfacial Strength between Thin Films

    Grant-in-Aid for Scientific Research  

    Project Year:  -   

  • Mechanism of Fracture due to Atom Migration in Small Structures

    Project Year: 1998.04  -  2000.09 

Books 【 display / non-display

  • Mitigating Tin Whisker Risks: Chapter 9 Mechanically induced tin whiskers

    Tadahiro Shibutani, Michael Osterman (Part: Contributor , Range: Chapter 9 Mechanically induced tin whiskers )

    Wiley  2016.06

     View Summary

    This chapter discusses the pressure-induced whisker at separable interfaces as a key reliability issue of lead-free separable contacts and connectors. It shows theories of mechanically induced tin whiskers. Then, several case studies with pure tin and lead-free finishes were performed to evaluate pressure-induced tin whiskers. For electronics components, several factors affect the stress field of the finish: (i) thickness of the plating, (ii) structure of the ambient component material, and (iii) material microstructures. As a methodology for the assessment of pressure-induced tin whisker formation, the creep-based tin whisker formation model shows good results. Several connectors with tin or tin-rich alloy finishes were assessed by means of the nanoindentation technique. For the flexible printed circuit (FPC), mechanical properties of adhesives are key factors influencing tin whisker formation. Each mechanical property can be obtained by the indentation technique, and stress distribution can be estimated by finite element analysis (FEA).

  • High reliability lead-free plating and tin whisker mitigation

    JIEP Tin Whisker Research Comittee (Part: Joint Editor )

    THE NIKKAN KOGYO SHIMBUN,LTD.  2013.12 ISBN: 978-4-526-071

Papers 【 display / non-display

  • IoT-Based Prognostics and Systems Health Management for Industrial Applications

    Daeil Kwon, Melinda R. Hodkiewicz, Jiajie Fan, Tadahiro Shibutani, Michael G. Pecht

    IEEE Access ( IEEE )  4   3659 - 3670   2016.07  [Refereed]

    Joint Work

    Web of Science DOI

  • Construction of Best Fit Fatigue Curve and Mean Stress Correction Method for Aluminum Alloy 6061-T6

    SHIGA Yuta, KOBAYASHI Hideo, YAMADA Toshihiro, SANO Takeru, SHIBUTANI Tadahiro

    Journal of High Pressure Institute of Japan ( HIGH PRESSURE INSTITUTE OF JAPN(HPI) )  59 ( 3 )   106 - 116   2021

    Joint Work

     View Summary

    Aluminum alloys of 6061-T6 have been applied as a liner for Type III composite cylinders. Load-controlled fatigue tests were performed on sever-al kinds of 6061-T6. The fatigue strength shows dependency on the ten-sile strength and there is no clear fatigue limit in the high fatigue life range of 10<sup>7</sup>-10<sup>8</sup> cycles. Based on these results, the best fit fatigue curve (BFC) of 6061-T6 was constructed for the fatigue analysis. An equation of the BFC includes tensile strength as a parameter. The superiority of the constructed BFC was verified by comparing it with that of the ASME code and the DOD handbook. The mean stress correction methods for the BFC of 6061-T6 were also discussed. A selected equation of the method is applicable to the both cases of tensile and compressive mean stresses. The superiority of the selected equation was verified by comparing it with that of the DOD handbook.

    DOI CiNii

  • Proposal for Condition-based Maintenance Method using Lubricating Oil Analysis and Machine Learning

    Aihara Ryoma, Fmakinwa Ayo, Shibutani Tadahiro

    Journal of Japan Society for Safety Enginennring ( Japan Soceiety for Safety Engineering )  59 ( 6 )   416 - 423   2020.12

    Joint Work

     View Summary

    <p>This paper provides a novel approach for condition-based monitoring based on lubricant analysis and machine-learning algorithm. We collected used lubricant oil samples from marine diesel engines. Samples were analyzed by using X-ray Fluorescence analysis. Wear elements such as iron were detected quantitatively. The relationship between elements were visualized by Gaussian Graphical Model(GGM), and it was suggested that iron particles mainly come from wear modes such as the contact between cylinder and piston ring. Kullback-Leibler divergence was used to quantify the change in the GGM. Anomaly scores were calculated for samples and the scores depends on ship routes. Sensitivity analysis revealed that sulfur and calcium from fuel affect the increase in the anomaly score. This approach may provide the quantitative novel information to condition based maintenance.</p>

    DOI CiNii

  • 3D Configuration of an Equal Tee Pipe and the Effect of It on Strength Evaluation by FEM Analysis

    NAKAMURA Izumi, SHIBUTANI Tadahiro

    The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers )  2020 ( 0 )   2020.09

    Joint Work

     View Summary

    In order to understand the feature of the actual tee pipe's configuration and the effect of the modeling of the configuration on the inelastic FEM analysis, the authors investigated the 3D configuration of a 150A equal tee pipe, and conducted monotonic loading analysis on the tee pipe. From the 3D configuration measurement, it was confirmed that the wall thickness of the tee pipe was non-uniformly distributed in the pipe; the thickest position was the bottom of tee and the wall thickness was approximately 47% thicker than the nominal value. The thinnest position was the branch pipe, and the wall thickness was almost the same as the nominal value. Following to the 3D configuration measurement, two FEM analysis models were prepared; one was based on the measured configuration, and the other was based on the nominal dimension. From the monotonic in-plane bending and out-of-plane bending analyses on these models, the load-deflection relationships of each condition were obtained. The results showed that the nominal dimension model evaluated the collapse load approximately 24-30% lower than that by the model based on the actual configuration.

    DOI CiNii

  • Verification of appropriate life parameters in risk and reliability quantifications of process hazards

    Mahesh Kodoth, Tadahiro Shibutani, Yehia F Khalil, Atsumi Miyake

    Process Safety and Environmental Protection ( Elsevier )  127   314 - 320   2019.07  [Refereed]

    Single Work

     View Summary

    Failure frequency estimation is one of the important measures of risk quantification. In traditional reliability assessment, mean time to failure (MTTF) is one of the most common life parameter to field failure data analysis. However, it is critically important to use correct life parameter for accurate reliability estimation. One of the uncertainties in reliability assessment is the inappropriate life parameter and how they could be selected. The scope of this study is to select an appropriate life parameters for hydrogen refueling stations (HRS). Field failure data of HRS is used as a case study to compare failure analysis based on two life parameters i.e. survival time vs. number of fillings at the station. A non-parametric estimator is used to estimate cumulative failure function based on number of fillings. The cumulative hazard using the Nelson-Aalen estimator showed a linear relationship with the number of fillings. A parametric estimator using 2-values (β and η) Weibull distribution function is employed to estimate cumulative probability of failure with the survival time. The present study demonstrates that the failure rate can vary by a small to large margin based on the life parameter and estimator chosen for reliability predictions. This shows the importance and need of verification of life parameter in QRA to reduce uncertainty associated with the risk calculation.

    DOI

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Review Papers 【 display / non-display

  • Guideline for highly accelerated limit test as qualitative accelerated test procedure

    Tadahiro SHIBUTANI

      58   4 - 6   2021.01

    Introduction and explanation (others)   Single Work

  • A fusion prognostics-based qualification test methodology for microelectronic products

    Michael Pecht, Tadahiro Shibutani, Myeongsu Kang, Melinda Hodkiewicz, Edward Cripps

    Microelectronics Reliability ( Elsevier )  63   320 - 324   2016.07  [Refereed]  [Invited]

    Introduction and explanation (scientific journal)   Joint Work

  • Standards for Tin Whisker Test Methods on Lead-Free Components

    Shibutani Tadahiro, Michael Osterman, Michael Pecht

    IEEE Transactions on Components and Packaging Technologies   32 ( 1 ) 216 - 219   2009.03

    Introduction and explanation (others)   Joint Work

  • Tin Copper Alloy Double-layered Plating Mitigating Tin Whiskers

    Function & Materials   28 ( 9 ) 20 - 25   2008.09

    Introduction and explanation (others)   Joint Work

  • Mechanism of pressure induced tin whisker formation

      28 ( 8 ) 30 - 35   2008.08

    Introduction and explanation (others)   Single Work

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Academic Awards Received 【 display / non-display

  • Best Paper Award in Microelectronics Symposium 2006

    2006.09    

  • JSME Funai Award

    2006.03    

  • JSME Young Engineers Award

    2005.04    

Grant-in-Aid for Scientific Research 【 display / non-display

  • Grant-in-Aid for Scientific Research(C)

    Project Year: 2019.04  -  2022.03 

 

Council/Academic activity outside the university 【 display / non-display

  • ISO/TC262 (Risk management)

    2019.04
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    2022.03

    Government   Expert

Social Contribution(Extension lecture) 【 display / non-display

  • TC262 Strategic Workshop

    ISO TC262 risk management  (Zoom) 

    2020.11