铝合金薄板在疲劳载荷下孔洞聚合试验中的材料损失

王芳文; 陈宜亨

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铝合金薄板在疲劳载荷下孔洞聚合试验中的材料损失

探索与争鸣 | 更新时间：2025-07-09

- 铝合金薄板在疲劳载荷下孔洞聚合试验中的材料损失
- Material Loss Due to Two Fatigue Cracks Growth in Coalescence Between Two Holes in Aluminum-Alloy Strip
- 西安交通大学学报 2009年43卷第3期页码：121-124
- 作者机构：
  
  西安交通大学航天航空学院,西安,710049
- 作者简介：
- 基金信息：
  
  : 2008-10-31. 作者简介: 王芳文(1963-),男,副教授;陈宜亨(联系人),男,教授,博士生导师. 基金项目: 国家自然科学基金资助项目(10572110);广西大学工程防灾与结构安全省部共建教育部重点实验室及广西防灾减灾与工程安全重点实验室开放基金资助项目(2008TMUF004)
- DOI：
  中图分类号： O346.4
- 网络首发：2009-03-10，
  
  纸质出版：2009
- 稿件说明：
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王芳文, 陈宜亨. 铝合金薄板在疲劳载荷下孔洞聚合试验中的材料损失[J]. 西安交通大学学报, 2009,43(3):121-124.

WANG Fangwen, CHEN Yiheng. Material Loss Due to Two Fatigue Cracks Growth in Coalescence Between Two Holes in Aluminum-Alloy Strip[J]. 2009, 43(3): 121-124.
王芳文, 陈宜亨. 铝合金薄板在疲劳载荷下孔洞聚合试验中的材料损失[J]. 西安交通大学学报, 2009,43(3):121-124. DOI：

WANG Fangwen, CHEN Yiheng. Material Loss Due to Two Fatigue Cracks Growth in Coalescence Between Two Holes in Aluminum-Alloy Strip[J]. 2009, 43(3): 121-124. DOI：

摘要

此文是航空铝合金薄板在疲劳载荷下2个相邻孔洞聚合的系列试验研究之一.研究发现:在某些情况下

2条初始的疲劳裂纹几乎同时产生在应力集中程度较高的2个相邻孔洞之间的区域

在2个孔洞内边缘各产生一条裂纹

同时在疲劳载荷下扩展

相互不连接

直至到达对方孔洞的边缘

也就是说孔洞的聚合是由2条裂纹导致的

而不是通常的由一条裂纹导致

最终孔洞的聚合导致大块材料的损失

而2个孔洞外边缘的疲劳裂纹在孔洞聚合导致材料损失后才继续扩展.这是一个新现象

超出了疲劳裂纹萌生的基本理论

也无法用经典的弹塑性分析理论来解释.

Abstract

This paper is one of a series of studies for the coalescence between two neighborly located holes in an aluminum-alloy strip under cyclic tensile loadings. Under some conditions

two initial fatigue cracks were found to nucleate at each hole's rim in the center region between the two holes

where the stress concentration is much more violent than that in other positions. These two cracks grew simultaneously and leaded to the coalescence of the two holes. Thus

a large material loss occurred in the center region between the two holes. Only after the material loss completed

the two outside fatigue cracks tended to grow at the outside rims of the two holes until final failure occurs. This is a new phenomenon

which is difficult to be explained with the classical theories.

关键词

Keywords

references

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王芳文,陈宜亨. 航空铝合金薄板在疲劳载荷下孔洞聚合的试验研究和一个新发现[J].西安交通大学学报, 2009, 43(1): 125-128.

WANG Fangwen, CHEN Yiheng. A new find in experimental research on coalescence between two holes in aluminum-alloy strip under cyclic tensile loading [J]. Journal of Xi'an Jiaotong University, 2009, 43(1): 125-128.

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