摘要
在扩展有限元法的基础上,引入一类附加位移形函数——分数型间断函数来模拟裂纹影响的衰减效应,并对相关公式进行推导,编写了扩展有限元程序模拟裂纹的扩展。通过算例表明,采用改进的扩展有限元法对裂纹扩展进行数值模拟无须重新划分网格,且具有较高的精度。
Based on the extended finite element method （ XFEM） , a class of enrichment displacement function -the fraction discontinu-ous function is applied to simulate the attenuating effect resulted by discontinuity such as crack and so on .Moreover , the relevant formula is derived and the XFEM program is compiled to simulate the crack propagation .Finally, the results with high accuracy are provided to completely demonstrate that the crack growth can be modeled by XFEM without re -meshing.
出处
《福建建设科技》
2014年第4期39-42,共4页
Fujian Construction Science & Technology
关键词
裂纹扩展
扩展有限元法
附加自由度
非连续附加函数
分数型间断函数
crack growth
extended finite element （XFEM）
enriched freedom degree
discontinuous enrichment function
fraction discontinuous function
