Three-Dimensional Crack Analysis using X-FEM Considering Symmetric Conditions

Journal of Computational Science and Technology

Naoki MIURA²  Toshio NAGASHIMA¹ 

[1] Faculty of Science and Technology, Sophia University;Central Research Institute of Electric Power Industry

关键词: Extended FEM;    Fracture Mechanics;    Energy Release Rate;    Symmetric Conditions;   

DOI  :  10.1299/jcst.2.210

学科分类：地球科学(综合)

来源: Japan Academy

【 摘 要 】

References(20)Cited-By(1)The extended finite element method (X-FEM), which can model the domain without explicitly meshing the crack surface, can be used to perform stress analyses for efficiently solving fracture mechanics problems. In the present study, the constraint condition enforcement for X-FEM analysis considering symmetry is presented. Since the interpolation functions utilized in X-FEM analysis include the enrichment basis functions, the freedoms of the node on the symmetric plane should be constrained properly in the X-FEM model with symmetric conditions. Moreover, evaluation of the energy release rate by the domain integral method should be performed considering the symmetry conditions. In the present paper, the constraint conditions for three-dimensional X-FEM analysis considering symmetric conditions are summarized, and numerical examples using symmetric X-FEM models are shown. The proposed procedure can be used to perform efficient X-FEM analyses of practical fracture problems.

【 授权许可】

Unknown