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作者:

Tao, Zhi-Qiang (Tao, Zhi-Qiang.) | Shang, De-Guang (Shang, De-Guang.) (学者:尚德广) | Sun, Yu-Juan (Sun, Yu-Juan.)

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EI Scopus SCIE

摘要:

A notch correction method is proposed under multiaxial cyclic loading, in which the real stress increments can be directly obtained by correcting the pseudo stress increments at the notch. Moreover, the proposed method does not inherently restrict the direction and magnitude of real backstress increment in the real stress space. Additionally, on the basis of Kanazawa et al.'s model, the proposed method utilizes pseudo notch strains in replacement of measured strains to take account of the additional hardening due to the non-proportionality of external loadings. Based on the proposed correction method integrated with constitutive equations using Garud's hardening model, a notch stress-strain estimation methodology is developed to calculate the local elastic-plastic stress-strain responses at the notch area. The presented methodology does not require iteration. The applicability of the presented methodology was verified by the experimental data of TC21 titanium alloy notched tubular specimens in this study and SAE 1070 steel notched shaft specimens from the literature. The results showed that the calculated notch strains correlate well with the measured strains under proportional and non-proportional loadings. (C) 2017 Elsevier Ltd. All rights reserved.

关键词:

Elastic-plastic Multiaxial cyclic loading Non-proportional hardening Notched component Stress-strain

作者机构:

  • [ 1 ] [Tao, Zhi-Qiang]Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, Beijing 100124, Peoples R China
  • [ 2 ] [Shang, De-Guang]Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, Beijing 100124, Peoples R China
  • [ 3 ] [Sun, Yu-Juan]Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, Beijing 100124, Peoples R China

通讯作者信息:

  • 尚德广

    [Shang, De-Guang]Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, Beijing 100124, Peoples R China

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来源 :

INTERNATIONAL JOURNAL OF FATIGUE

ISSN: 0142-1123

年份: 2017

卷: 103

页码: 280-293

6 . 0 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:169

中科院分区:2

被引次数:

WoS核心集被引频次: 20

SCOPUS被引频次: 22

ESI高被引论文在榜: 0 展开所有

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