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Evaluation of Creep-Fatigue Behavior under Multiaxial Loading Based on the Overstress Concept

Research Project

Project/Area Number 63460076
Research Category

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

Allocation TypeSingle-year Grants
Research Field 材料力学
Research InstitutionThe University of Tokyo

Principal Investigator

ASADA Yasuhide  University of Tokyo, Dept. of Mech. Eng. Prof., 工学部, 教授 (20011091)

Co-Investigator(Kenkyū-buntansha) NITTA Yasuwo  University of Tokyo, Dept. of Mech. Eng. Asst., 工学部, 助手 (60011087)
Project Period (FY) 1988 – 1989
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥5,100,000 (Direct Cost: ¥5,100,000)
Fiscal Year 1989: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1988: ¥4,000,000 (Direct Cost: ¥4,000,000)
KeywordsMultiaxial Stress / Creep-Fatigue / Overstress / Internal Stress / 304 Stainless Steel / Environmental Effect / 304ステンレス鋼 / クリープ疲労相互作用
Research Abstract

A research has been made in order to establish a creep-fatigue life prediction procedure under multiaxial loading condition. Deformation and failure behaviors under the multiaxial creepfatigue condition were studied in detail. Hollow cylindrical test specimens were prepared with solution annealed 304 stainless steel and were subjected to a strain controlled tension-torsion under proportional loading at 650゚C in air. Additionally, uniaxial push-pull strain controlled creep-fatigue tests were also made with the same test material at 650゚C in air and in high vacuum environment.
Analyses were made with stress-strain responses of the test results to obtain the overstress and the internal stress in order to make clear the relation between the inelastic deformation behaviors and those components of stress.
A development of anisotropy was observed with the overstress and the internal stress even though the peak stresses showed isotropy. The time dependent behavior of the overstress showed a chan … More ge due to the ratio of normal versus shear overstress components. It was concluded that the shear component of the overstress controls the time-independent component of the inelastic deformation and that the normal component of the overstress controls the time-dependent component of the inelastic deformation. Additionally, It was made clear that the stress relaxation behavior is composed of, at least, two components: one is the relaxation of the overstress and the other is the relaxation of the internal stress. The former occurs with a high stress relaxation rate to cease within a short time duration,, however, the latter has a slow relaxation rate to last for long time.
Regarding the creep fatigue failure behavior, the inelastic strain integration of the overstress controls the time-independent component of the creep-fatigue damage. Furthermore, The maximum resolved shear component of the overstress controls the environment free component of the damage. The environmental effect is included in the time-independent damage component and is governed by a resolved normal component of the overstress.
The time-dependent component of the damage is well described with the time integration of the maximum principal overstress component. Obtained is the creep-fatigue life prediction equation which is available for the multiaxial loading condition including the environmental effect. Less

Report

(3 results)
  • 1989 Annual Research Report   Final Research Report Summary
  • 1988 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] 中村、石川、朝田: "高温多軸応力下における内部応力と応力緩和挙動に関する研究" 日本機械学会論文集. 55. 2159-2164 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] T.Nakamura,T.Ishikawa and Y.Asada: "Extension of Overstress Concept for Biaxial Creep-Fatigue Behavior" Preprint of 3rd International Conference on Biaxidal/Multiaxial Fatigue. II. 47.1-47.18 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] T.Nakamura,T.Ishikawa and Y.Asada: "Relaxation Behavior of 304 Stainless Steel under Tension-Torsion Biaxial Loading" Collection and Uses of Relaxation Data in Design ASME Publication PVP. 172. 69-76 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] T.Nakamura,T.Ishikawa and Y.Asada: "Extension of overstress Concept to Biaxial/Multiaxial Creep-Fatiuge Behavior" Proceedings of 3rd International Conference on Biaxial/Multiaxial Fatigue(to be published).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] T.Nakamura,T.Ishikawa and Y.Asada: "Relaxation Behavior of 304 Stainless Steel under Tension-Torsion Biaxial Loading" Engineering Materials Science(to be published).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Nakamura, T., Ishikawa, T. and Asada, Y.: "A Study on Internal Stress and Stress Relaxation Behavior under Multiaxial Stress at Elevated Temperatures" Proceedings of Japan Society of Mechanical Engineers (in Japanese) Vol. 55 pp.2159-2164 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Nakamura, T., Ishikawa, T. and Asada, Y.: "Extension of Overstress Concept for Biaxial Creep-Fatigue Behavior" Preprint of 3rd International Conference on Biaxial/Multiaxial Fatigue (University of Stuttgart) Vol. II pp.47.1-47.18 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Nakamura, T., Ishikawa, T. and Asada, Y.: "Relaxation Behavior of 304 Stainless Steel under Tension-Torsion Biaxial Loading" "Collection and Uses of Relaxation Data in Design", American Society of Mechanical Engineers, Publication PVP-172 pp.69-76 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Nakamura, T., Ishikawa, T. and Asada, Y.: "Extension of the Overstress Concept to Biaxial/Multiaxial Creep-Fatigue Behavior" Proceedings of 3rd International Conference on Biaxial/Multiaxial Fatigue.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Nakamura, T., Ishikawa, T. and Asada, Y.: "Relaxation Behavior of 304 Stainless Steel under Tension-Torsion Biaxial Loading" Engineering Materials Science.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 中村俊哉,石川智成,朝田泰英: "高温多軸応力下における内部応力と応力緩和挙動に関する研究" 日本機械学会論文集. 55. 2159-2164 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] T.Nakamura,T.Ishikawa and Y.Asada: "Extension of Overstress Concept for Biaxial Creep-Fatigue Behavior" Proceedings of 3rd International Conference on Biaxial/Multiaxial Fatigue. II. 47.1-47.18 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] T.Nakamura,T.Ishikawa and Y.Asada: "Relaxation Behavior of 304 Steel under Tension-Torsion Biaxial Loading" “Collection and Uses of Relaxation Data in Design"ASME Publication PVP. 172. 69-76 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] T.Nakamura,T.Ishikawa and Y.Asada: "Extension of Overstress Concept to Biaixial Creep-Fatigue Behavior" Proceedings of 3rd International Conference on Biaxial/Multiaxial Fatigue.

    • Related Report
      1989 Annual Research Report
  • [Publications] T.Nakamura,T.Ishikawa and Y.Asada: "Relaxation Behavior of 304 Stainless Steel under Tension-Torsion Biaxial Loading" Engineering Materials Science.

    • Related Report
      1989 Annual Research Report

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Published: 1988-04-01   Modified: 2016-04-21  

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