两级载荷作用下复合材料界面的脱粘

陈艳华; 石志飞; 朱庆杰

两级载荷作用下复合材料界面的脱粘

1.
北京交通大学土木建筑工程学院北京 100044;
2.
河北理工学院土木建筑系唐山 063009

基金项目: 国家自然科学基金(50378001)和国家教育部优秀青年教师教学和科研奖励计划资助项目(教人司2000[26]号)。

详细信息

通讯作者:
石志飞,教授,博士生导师,研究方向为智能材料与结构、材料的疲劳 E-mail:zfshi178@sohu.com

中图分类号: TU375
计量
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出版历程
- 收稿日期: 2003-05-26
- 修回日期: 2003-07-20
- 刊出日期: 2004-08-14

INTERFACIAL DEBONDING OF COMPOSITE UNDER TWO-STAGE LOADING

1.
School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
2.
Department of Civil Engineering, Hebei Institute of Technology, Tangshan 063009, China

摘要

摘要: 研究了两级拉伸疲劳载荷作用下,纤维增强复合材料界面的脱粘。首先基于剪切筒模型,建立了求解纤维与基体应力的控制微分方程,并求得了相关解答。然后借助断裂力学中描述疲劳裂纹扩展的公式和能量耗散率理论,给出了界面脱粘长度、加载次数以及脱粘应力之间的关系式。最后通过实例模拟了两级拉伸疲劳载荷作用下的界面裂纹扩展,分析了界面疲劳裂纹扩展速率、脱粘长度在不同加载方式下的变化规律,以及材料泊松比的变化对界面脱粘的影响。从而为进一步研究工程结构的疲劳破坏和材料的最优设计提供一定的理论依据。
- 纤维增强复合材料 /
- 两级载荷 /
- 界面疲劳 /
- 脱粘 /
- 裂纹扩展
Abstract: The interfacial damage of fiber-reinforced composite under two-stage tension fatigue loading is studied. Based on the shear-lag model, the governing equations of the problem are established and the related solution is obtained. By the aid of the Paris law and the energy release theory, the relationship between debond rate and debond force is established. As an example, the interfacial debonding is simulated under the two-stage tension fatigue loading. The rules of the crack growth are analyzed for several kinds of two-stage loadings. The effect of Poisson's contraction on interfacial debonding is studied also. The present study is helpful for analyzing the damage of engineering materials and structures under fatigue loading.
- fiber-reinforced composite /
- two-stage loading /
- interfacial fatigue /
- debond /
- crack growth