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Investigation on Threshold Behavior of High Temperature Fatigue Crack Propagation and Its Mechanisms Using Macroscopic Experiments and Microscopic Molecular Dynamic Analyses

Research Project

Project/Area Number 09450050
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionOsaka University

Principal Investigator

KUBO Shiro  Graduate School of Engineering, Osaka University, Professor, 大学院・工学研究科, 教授 (20107139)

Co-Investigator(Kenkyū-buntansha) TSUJI Masahiro  Graduate School of Engineering, Osaka University, Research Associate, 大学院・工学研究科, 助手 (10132630)
SAKAGAMI Takahide  Graduate School of Engineering, Osaka University, Associate Professor, 大学院・工学研究科, 助教授 (50192589)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥11,800,000 (Direct Cost: ¥11,800,000)
Fiscal Year 1999: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1998: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1997: ¥7,500,000 (Direct Cost: ¥7,500,000)
KeywordsHigh Temperature Fatigue / Fatigue Crack Propagation / Threshold / Molecular Dynamics / Simulation / Fracture Mechanics / 逆問題 / 電気ポテンシャルCT法 / 非破壊検査 / 異種接合材料 / 界面剥離 / スマートマテリアル / き裂同定 / 真空環境 / 周波数依存性
Research Abstract

The present project investigated the near-threshold fatigue crack propagation behavior and mechanisms of the threshold For this purpose macroscopic high temperature fatigue crack propagation experiments were conducted. Effects of environment, loading frequency, temperature and loading history were examined. On the other hand microscopic molecular dynamic analyses on near-threshold fatigue crack propagation were made. The results obtained are summarized as follows.
1.For SUS 304 stainless steel and Ni-base super alloy, high temperature fatigue crack propagation experiments were conducted in air and in vacuum. It was found that environment, loading frequency, and temperature had major influences on the near-threshold fatigue crack propagation rate da/dN and the threshold. The crack propagation resistance was lower that in air.
2.For aged Cr-Mo-V steel, high temperature crack propagation behavior was investigated. The effect of aging on the crack propagation was small. The estimation of remaining life was made. The influences of many parameters on the life were identified.
3.The simulations of the near-threshold fatigue crack propagation in iron were made using the molecular dynamics. A scheme was proposed which considered the decrease in the inter-atomic force due to oxidation of the new crack surface. It was found that near-threshold fatigue crack propagation behavior can be simulated by using the molecular dynamics. The effects of the orientation and grain boundary were examined. The crack propagation behavior contained in the linear elastic singular stress field was compared with that in the Hutchinson-Rice-Rosengren plastic singular field.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] Shiro Kubo: "Molecular Dynamic Simulation of Near-Threshold Fatigue Crack Propagation"Fatigue, Fracture, and High Temperature Design Methods in Pressure Vessels and Piping. PVP-Vol365. 363-374 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Eiichi TAMURA: "Near-Threshold Fatigue Crack Growth Behavior of SUS304 Steel at High Temperature Using Interferometric Strain/Displacement Gage (2nd Report, Fatigue Crack Growth Behavior)"JSME Int. J, Ser.I. Vol42、 No1. 97-103 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 田村栄一: "SUS304鋼における高温疲労き裂進展の下限界挙動の周波数依存性"日本機械学会論文集(A編). 65巻630号. 320-328 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 久保司郎: "下限界近傍の疲労き裂進展挙動の分子動力学解析とその方法"日本機械学会論文集(A編). 65巻631号. 582-588 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 田村栄一: "SUS304鋼における下限界近傍の高温疲労き裂進展の周波数依存性に基づくき裂進展抵抗に関する考察"日本機械学会論文集(A編). 65巻635号. 1539-1545 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Shiro Kubo: "Life Estimation of Creep Crack Propagation in Aged Power Plant Pipes Using the Engineering Approach"Fatigue, Fracture, and Weld Residual Stress. PVP-Vol.393. 105-111 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 佐藤晶: "SUS304鋼の下限界近傍の真空中高温疲労き裂伝ぱ挙動"日本機械学会材料力学部門講演会講演論文集. No.99-16. 143-144 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] KUBO, Shiro: "Molecular Dynamic Simulation of Near Threshold Fatigue Crack Propagation"Fatigue, Fracture, and High Temperature Design Methods in Pressure Vessels and Piping. ASME PVP-Vol.365. 363-374 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] TAMURA, Eiichi: "Near-Threshold Fatigue Crack Growth Behavior of SUS304 Steel at High Temperatures Using Interferometric Strain/Displacement Gage (2nd Report, Fatigue Crack Growth Behavior)"JSME Int. J., Ser.I. Vol.42, No.1. 97-103 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] TAMURA, Eiichi: "Loading Frequency Dependence of Threshold Behavior of Fatigue Crack Growth in SUS 304 Stainless Steel at Elevated Temperature"Trans. Japan Soc. Mech. Engrs.. Vol.65, No.630. 320-328 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] KUBO, Shiro: "Molecular Dynamic Simulations and Their Methods for Investigating Near-Threshold Fatigue Crack Propagation Behavior"Trans. Japan Soc. Mech.Engrs.. Vol.65, No.631. 582-588 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] TAMURA, Eiichi: "Discussion on Crack Growth Resistance Based on Loading Frequency Dependence of Near-Threshold Fatigue Crack Growth in SUS 304 Steel at Elevated Temperature"Trans. Japan Soc. Mech. Engrs. Vol.65, No.635. 1539-1545 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] KUBO, Shiro: "Life Estimation of Creep Crack Propagation in Aged Power Plant Pipes Using the Engineering Approach"Fracture, Fatigue and Weld Residual Stress. ASME PVP-Vol.393. 105-111 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] SATO, Akira: "Near-Threshold Fatigue Crack Growth Behavior of SUS 304 Steel at Elevated Temperature in Vacuum"Preprint of Japan Soc. Mech. Engrs.. No.99-16. 143-144 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] LI Shanqing: "Life Estimation of Creep Crack Propagation in Aged Power Plant Pipes Using the Engineering Approach"Fracture, Fatigue and Weld Residual Stress. PVP -Vol.393. 105-111 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 田上宣寛: "SUS304鋼の下限界近傍の真空中高温疲労き裂伝ぱ挙動"日本機械学会材料力学部門講演会講演論文集. N0.99-16. 143-144 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Shiro KUBO: "Molecular Dynamic Simulation of Near-Threshold Fatigue Crack Propagation" Fatigue, Fracture, and High Temperature Design Methods in pressure Vessels and Piping. ASME PVP-Vol.365. 363-374 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 古川 晃: "α鉄における下限界近傍の疲労き裂進展挙動に対する結晶方位の影響に関する分子動力学解析" 日本機械学会材料力学部門講演会講演論文集. No.98-5, Vol.B. 31-32 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kiyotsugu OHJI: "Near-Threshold Fatigue Crack Growth Behavior of SUS304 Steel at High Temperatures Using Interferometric Strain/Displacement Gage (1st Report, Crack Closure Behavior)" JSME Int.J., Ser.I. Vol.42. 90-96 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Eiichi TAMURA: "Near-Threshold Fatigue Crack Growth Behavior of SUS304 Steel at High Temperatures Using Interferometric Strain/Displacement Gage (2nd Report, Fatigue Crack Growth Behavior)" JSME Int.J., Ser.I. Vol.42. 97-103 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 田村 栄一: "SUS304鋼における高温疲労き裂進展の下限界挙動の周波数依存性" 日本機械学会論文集(A編). 65巻. 320-328 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 久保 司郎: "下限界近傍の疲労き裂進展挙動の分子動力学解析とその方法" 日本機械学会論文集(A編). 65巻(掲載予定). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 田上 宣寛: "高温条件下における下限界近傍の疲労き裂進展挙動に関する実験的検討" 日本機械学会関西支部第74期定時総会講演会講演論文集. No.994-1(掲載予定). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Eiichi TAMURA: "An Application of Interferometric Strain-Displacement Gauge to Measurement of Fatigue Crack Closure at High Temperatures" Proc.Int.Conf.Advanced Tech.in Experimental Mechanics. 55-56 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 田村栄一: "下限界近傍の高温疲労き裂進展の荷重周波数依存性とそれによるき裂進展抵抗に関する考察" 第9回破壊力学シンポジウム講演論文集. 85-89 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 田村栄一: "高温における低速度疲労き裂伝ぱと下限界挙動の分子動力学シミュレーション" 第9回破壊力学シンポジウム講演論文集. 90-94 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 田村栄一: "下限界近傍における疲労き裂進展の分子動力学シミュレーション" 日本機械学会材料の強度と破壊に関するモデリング/シミュレーション/,マルチメディアシンポジウム講演論文集. No.97-44. 20-23 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 三崎正輝: "下限界近傍における疲労き裂進展挙動に及ぼす結晶方位と粒界の影響に関する分子動力学的検討" 日本機械学会関西支部第73期定時総会講演会講演論文集. (発表予定). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 田村栄一: "K_<max>の上昇による中高温条件下でのSUS304鋼の低ΔK域における疲労き裂伝ぱの下限界挙動の検討" 日本機械学会論文集(A編). (掲載予定). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Shiro KUBO: "Molecular Dynamic Simulation of Near-Threshold Fatigue Crack Propagation" 1998 ASME/JSME Joint Pressure Vessels and Piping Conf.(発表予定). (1998)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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