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作者:

Li, Dao-Hang (Li, Dao-Hang.) | Shang, De-Guang (Shang, De-Guang.) (学者:尚德广) | Mao, Zheng-Yu (Mao, Zheng-Yu.) | Chen, Hong (Chen, Hong.) | Cong, Ling-Hua (Cong, Ling-Hua.) | Tao, Zhi-Qiang (Tao, Zhi-Qiang.)

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EI Scopus SCIE

摘要:

In this paper, a life prediction method based on damage mechanism for titanium alloy TC4 under multiaxial thermo-mechanical fatigue loading is proposed. Temperature and time dependent influence factors are proposed and introduced into the strain amplitude-life curve method to consider the temperature and time dependence of damage, respectively. The increase in fatigue and oxidation damages caused by tensile mean stress and non-proportional additional hardening is expressed by the mean stress in Macaulay brackets and by using a multiaxial damage param-eter, respectively. A fast cracking influence factor is proposed to consider the influence of fast cracking of materials caused by the combined action of high temperature, tensile stress and shear stress on damage behavior. The material constants are identified by test data under uniaxial and proportional loadings, and are further used for prediction under non-proportional loading. The failure life results of uniaxial isothermal fatigue tests with and without dwell time, uniaxial and multiaxial thermo-mechanical fatigue tests are used to verify the proposed method. The value of the scatter band of life prediction result is less than +/- 2, as well as the maximum and mean relative errors between predicted and experimental strain amplitudes are 18.49% and 6.54%, respectively.

关键词:

Titanium alloy Damage mechanism Life prediction Multiaxial thermo-mechanical fatigue

作者机构:

  • [ 1 ] [Li, Dao-Hang]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 2 ] [Shang, De-Guang]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 3 ] [Mao, Zheng-Yu]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 4 ] [Chen, Hong]Aircraft Strength Res Inst China, Xian 710065, Peoples R China
  • [ 5 ] [Cong, Ling-Hua]Aircraft Strength Res Inst China, Xian 710065, Peoples R China
  • [ 6 ] [Tao, Zhi-Qiang]Beijing Union Univ, Coll Robot, Beijing 100020, Peoples R China

通讯作者信息:

  • [Shang, De-Guang]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China;;

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来源 :

ENGINEERING FRACTURE MECHANICS

ISSN: 0013-7944

年份: 2023

卷: 282

5 . 4 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:19

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