复合材料分层问题中界面层方法的数值研究

基金项目: 国家自然科学基金(10572012); 航空科学基金(2008ZA51010)

详细信息

Numerical study of cohesive zone approach for simulation of delamination in laminated composites

摘要

摘要: 通过对双悬臂梁(DCB) 开裂问题的数值模拟, 研究了使用界面层方法时所遇到的数值问题。重点讨论了静态方法和准静态方法对计算效率的影响以及界面层的应力应变函数对计算精度的影响。对模拟过程中所遇到的精度及收敛性问题进行了研究。研究表明, 准静态方法可有效模拟分层问题, 但界面层的本构关系应具有一个缓慢的退化过程。
- 界面层 /
- 双悬臂梁(DCB) /
- 计算效率 /
- 计算精度 /
- 收敛性
Abstract: By the numerical simulation of the delamination problem of a double-cantilever beam (DCB) , the issues encountered during numerical simulation based on the cohesive zone approach were studied, which was focusd on the quasi-static methods and static methods for calculating the efficiency as well as the stress-strain function of the interface layer for calculating the accuracy and convergence. The calculation implies that the quasi-static method can effectively simulate the process of delamination; and the stress-strain function of the interface layer should have a degenerate course.
- interface layer /
- double-cantilever beam (DCB) /
- efficiency /
- accuracy /
- convergence