ABSTRACT

In this paper, a comparative study between the smeared crack and extended finite element method (XFEM) is performed. Also, the effective parameters for predicting crack profiles are investigated. The results show that the crack profile in the two models is partially different. Also, the important difference between the two models is computational efficiency. In addition to analysis time, complexity algorithm of XFEM is noticeable. Update assembling matrices, determine interaction integral and control of crack mouth opening at each loading step require enough space of memory which with increasing number of elements, ordinary computers run out of memory during solving.

摘要

在本文中，对涂抹裂纹和扩展有限元法 (XFEM) 进行了比较研究。此外，还研究了用于预测裂纹剖面的有效参数。结果表明，两种模型中的裂纹剖面存在部分差异。此外，这两个模型之间的重要区别是计算效率。除了分析时间之外，XFEM 的复杂算法也很明显。更新装配矩阵、确定相互作用积分和控制裂纹开口在每个加载步骤都需要足够的内存空间，随着元素数量的增加，普通计算机在求解时会耗尽内存。