|
| Study on Smoothed Extended Finite Element Method and its characteristics |
| Received:November 05, 2019 Revised:January 06, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20191105001 |
| KeyWord:XFEM S-FEM S-XFEM stress intensity factor (SIF) crack |
| Author | Institution |
| 徐志民 |
西北工业大学 航空学院, 西安 |
| 谢伟 |
西北工业大学 航空学院, 西安 |
| 窦鹏鹏 |
西北工业大学 航空学院, 西安 |
|
| Hits: 911 |
| Download times: 607 |
| Abstract: |
| In this paper,a new smoothed extended finite element method (S-XFEM) was proposed by simultaneously introducing the cell-based and edge-based strain smoothing technique of the Smoothed Finite Element Method (S-FEM) into the Extended Finite element method (XFEM).The S-XFEM adopted the smooth domain partition of the ES-FEM in the selection of elements and accepted the extension nodes and the integration strategy of the CS-FEM based on triangular subdomain in the numerical integration calculation of stiffness matrix with the new integration strategy of Gaussian points.And then the S-XFEM calculation program was designed and programmed with Matlab.The characteristics of the S-XFEM were compared in several classical examples to verify the accuracy and applicability.The results show that both the XFEM and the S-XFEM have high computational accuracy and convergence.The computational accuracy of the XFEM is slightly higher than that of the S-XFEM,while the S-XFEM is obviously superior to the XFEM in mesh independence. |