Virtual Crack Closure Technique Based on MSIM Method

摘要：

　　The virtual crack closure technique is applied to the calculation of stress intensity factor (SIF) in the framework of meshless Shepard interpolation method (MSIM).In the MSIM interpolation,the Shepard shape functions are used for the partition of unity and the local cover functions are separately constructed for the nodes on the boundary and inside the domain.There are three desirable properties in the MSIM including the completeness property,the delta property which lead to easy boundary treat and the low computational expense of the shape function.In the virtual crack closure technique,the assistant finite element mesh is added beside the crack tips,and the SIFs are calculated naturally and effectively near the tips by using the MSIM.Numerical result for a star-shaped crack in a square plate is reported to demonstrate the correctness and robust of the present method.

关键词： Meshless Shepard interpolation method Partition of unity method Virtual crack closure technique Stress intensity factor

作者: Feng Su Jie Wu Yongchang Cai

作者单位: State Key Laboratory for disaster reduction in Civil Engineering,Tongji University,Shanghai,China 200092;Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai,China 200092

会议类型: 国际会议

会议名称: 第13届国际断裂大会(ICF2013)

会议地点: 北京

会议语种:英文

页码: 1-8

在线出版日期: 2013-06-16（万方平台首次上网日期，不代表论文的发表时间）