STUDY ON CRACK PROPAGATION RATE UNDER FATIGUE LOAD

YANG DaPeng; WANG JunJie; YANG XinHua; ZHAO Yao

doi:10.16579/j.issn.1001.9669.2017.01.030

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STUDY ON CRACK PROPAGATION RATE UNDER FATIGUE LOAD

更新时间：2022-09-22

- STUDY ON CRACK PROPAGATION RATE UNDER FATIGUE LOAD
- Journal of Mechanical Strength Vol. 39, Issue 1, Pages: 178-182(2017)
- 作者机构：
  
  1. 华中科技大学土木工程与力学学院力学系博士后流动站
  2. 郑州职业技术学院机械工程系
  3. 华中科技大学船舶与海洋工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2017.01.030
  CLC：
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YANG DaPeng, WANG JunJie, YANG XinHua, et al. STUDY ON CRACK PROPAGATION RATE UNDER FATIGUE LOAD. [J]. 39(1):178-182(2017)
DOI：

YANG DaPeng, WANG JunJie, YANG XinHua, et al. STUDY ON CRACK PROPAGATION RATE UNDER FATIGUE LOAD. [J]. 39(1):178-182(2017) DOI： 10.16579/j.issn.1001.9669.2017.01.030.

摘要

主要研究含裂纹构件在具有不同应力比与不同加载频率的疲劳载荷作用下裂纹扩展速率公式新的表现形式。运用新裂纹扩展速率公式,定量地计算出具有不同应力比与不同加载频率的疲劳载荷作用下线弹性裂纹的扩展速率。综合考虑了疲劳作用应力,裂纹尖端应力强度因子的变化幅值,总结出新裂纹扩展速率公式的适用范围,检验了新裂纹扩展速率公式的准确性和实用性。

Abstract

In this article,the new manifestation of crack propagation rate formula has been mainly studied when fatigue loads with diverse stress ratio and frequency acting on component with cracks. Linear and elastic crack propagation rate under fatigue loads with diverse stress ratio and frequency has been calculated quantificationally and accurately by modifying new crack propagation rate formula. Scope of application of modifying new crack propagation rate formula has been summarized where the effects of applied fatigue stresses,stress intensity factor transformation amplitudes at the fatigue crack tip are taken into considerations,accuracy and practicability of modifying new crack propagation rate formula having been tested.

关键词

应力比频率扩展速率线弹性

Keywords

Stress ratioFrequencyPropagation rateLinear and elastic

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