Structured Extended Finite Element Methods of Solids Defined by Implicit Surfaces

[摘要] A paradigm is developed for generating structured finite element models from solid models by means of implicit surface definitions. The implicit surfaces are defined by radial basis functions. Internal features, such as material interfaces, sliding interfaces and cracks are treated by enrichment techniques developed in the extended finite element method (X-FEM). Methods for integrating the weak form for such models are proposed. These methods simplify the generation of finite element models. Results presented for several examples show that the accuracy of this method is comparable to standard unstructured finite element methods.

[发布日期] 2002-11-17 [发布机构] Lawrence Livermore National Laboratory

[关键词] Lawrence Livermore National Laboratory;Finite Element Method;Accuracy;99 General And Miscellaneous//Mathematics, Computing, And Information Science