EXPERIMENT STUDY ON CRACK GROWTH RATE OF ADB610 STEEL UNDER DIFFERENT STRESS RATIOS

WEI Long; WANG ShiYue; LIU GuoShou; YANG XiJie

doi:10.16579/j.issn.1001.9669.2016.01.013

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EXPERIMENT STUDY ON CRACK GROWTH RATE OF ADB610 STEEL UNDER DIFFERENT STRESS RATIOS

更新时间：2022-09-22

- EXPERIMENT STUDY ON CRACK GROWTH RATE OF ADB610 STEEL UNDER DIFFERENT STRESS RATIOS
- Journal of Mechanical Strength Vol. 38, Issue 1, Pages: 64-68(2016)
- 作者机构：
  
  1. 昆明理工大学建筑工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2016.01.013
  CLC：
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WEI Long, WANG ShiYue, LIU GuoShou, et al. EXPERIMENT STUDY ON CRACK GROWTH RATE OF ADB610 STEEL UNDER DIFFERENT STRESS RATIOS. [J]. 38(1):64-68(2016)
DOI：

WEI Long, WANG ShiYue, LIU GuoShou, et al. EXPERIMENT STUDY ON CRACK GROWTH RATE OF ADB610 STEEL UNDER DIFFERENT STRESS RATIOS. [J]. 38(1):64-68(2016) DOI： 10.16579/j.issn.1001.9669.2016.01.013.

摘要

采用标准紧凑拉伸试样进行五级应力比(R=0.1、0.2、0.3、0.4和0.5)的疲劳裂纹扩展速率试验,使用递增多项式法对试验数据进行处理,得到不同应力比下的裂纹扩展速率曲线及表达式。定量分析了应力比对裂纹扩展速率和Paris公式中两个重要参数的影响,并对五级应力比下的疲劳断口进行了分析,探讨了应力比对裂纹扩展速率的影响机理。

Abstract

The test of the fatigue crack growth rate under five stress ratios（ R = 0. 1,0. 2,0. 3,0. 4 and 0. 5） is completed used the compact tensile specimen. The test data are processed by using incremental polynomial method and the expressions and curves of crack growth rate under different stress ratios are obtained. The effect of stress ratio on crack growth rate and two important parameters in Paris formula are analyzed. Moreover,the fatigue fractures under different stress ratios are analyzed,and discussed the mechanism of effect on crack propagation rate under different stress ratios.

关键词

Paris公式递增多项式法应力比裂纹扩展速率断口形貌疲劳断口

Keywords

Paris formulaIncremental polynomial methodStress ratioCrack growth rateFractographsFatigue fracture

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