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Analyses on Damage and Deformation in Notched Component under Multiaxial Low Cycle Fatigue

Research Project

Project/Area Number 62460075
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 機械材料工学
Research InstitutionKyoto University

Principal Investigator

INOUE Tatsuo  Faculty of Engineering, Kyoto University, Professor, 工学部, 教授 (10025950)

Co-Investigator(Kenkyū-buntansha) IMATANI Shoji  Frculty of Enginnering, Kyoto University, Instructor, 工学部, 助手 (70191898)
HOSHIDE Toshihiko  Faculty of Engineering, Kyoto University, Instructor, 工学部, 助手 (80135623)
Project Period (FY) 1987 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥7,900,000 (Direct Cost: ¥7,900,000)
Fiscal Year 1988: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1987: ¥6,900,000 (Direct Cost: ¥6,900,000)
KeywordsNotched Component / Low Cycle Fatigue / Multiaxial Stress / Finite Element Analysis / Damage Mechanics / Fracture Mechanics / Crack Initiation / き裂伝ぱ
Research Abstract

An elastic-plastic finite element procedure was developed to analyze stress/strain at notch root of specimen subjceted to combined tension and torsion loadings. The applicability of the developed procedure was examined in the comparison with experimental observation.
Fatigue tests were conducted under in-phase axial-torsional loadings in load-controlled condition. Tested materials were pure copper and medium-carbon steel. Cracking behavior was observed by using a plastic replication technique. The results indicated that the fatigue life and cracking morphology was dependent on the material microstructure and/or stress multiaxiality.
Two analytical procedures were investigated to explain the difference in life and cracking mentioned above, One of the procedures was based on a damage mechanics approach. The analytical result obtained using the procedure showed a good correspondence with the crack distribution depending on the stress multiaxiality. The other procedure was based on modeling of both processes of crack initiation and propagation, simultaneously. It was found from the simulated results that the proposed procedure was effective for describing the fatigue life and cracking morphology depending on the microstructure and multiaxial stress state.

Report

(3 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • 1987 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] Tatsuo,INOUE: Proc.Far East Fract.Group Workshop. 177-184 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 星出敏彦: 材料. 38. (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 星出敏彦: 日本機械学会論文集 A編. 55. (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 星出敏彦: 材料.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Tatsuo INOUE: "Damage Mechanics Approach to Crack Initiation in Notched Component under Multiaxial Low Cycle Fatigue" Proceedings of the Far East Fracture Group Workshop. 177-184 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Toshihiko HOSHIDE: "Propagation Behavior of Elastic-Plastic Fatigue Crack under Biaxial Stress State" Journal of the Society of Material Science, Japan. 38. (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Toshihiko HOSHIDE: "Analysis of Intergranular Cracking in Low Cycle Fatigue under Biaxial Stresses" Transaction of the Japan Society of Mechanical Engineers. A 55. (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Toshihiko HOSHIDE: "Fatigue Crack Growth and Life Prediction of Notched Component Subjected to Combined Axial-Torsional Loadings"

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Tatsuo,INOUE: Proc.Far East Fract.Groct Workshop. 177-184 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 星出敏彦: 材料. 38. (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] 星出敏彦: 日本機械学会論文集A編. 55. (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] 星出敏彦: 材料.

    • Related Report
      1988 Annual Research Report
  • [Publications] 星出敏彦: 日本機械学会論文集 A編.

    • Related Report
      1987 Annual Research Report

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Published: 1987-04-01   Modified: 2016-04-21  

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