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| Simulation of meso-fracture process of concrete using the extended finite element method |
| Received:October 10, 2011 Revised:March 16, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20126021 |
| KeyWord:the XFEM(Extended Finite Element) concrete meso mechanics fracture |
| Author | Institution |
| 杜修力 |
北京工业大学 城市与工程安全减灾教育部重点实验室,北京 |
| 金浏 |
北京工业大学 城市与工程安全减灾教育部重点实验室,北京 |
| 黄景琦 |
北京工业大学 城市与工程安全减灾教育部重点实验室,北京 |
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| Abstract: |
| The XFEM(Extended Finite Element Method) is a new and effective simulation method for analyzing the discontinuity mechanical issues,especially the fracture problem.In the XFEM,in order to reflect the discontinuities of displacement,a jump function and asymptotic crack-tip displacement fields are added to the common finite element approximation for the local enrichment based on the framework of partition of unity.The basic theory of the XFEM is introduced firstly,and the method for analyzing the fracture and crack growth of meso concrete is presented.Finally,the meso fracture processes of wet-screened concrete specimens under uniaxial tension and Winkler L-shape concrete plate are investigated by the XFEM.The concrete crack initiations,the process of expansion and failure modes are given out in the study.The simulation results agree remarkably well with the experimental observations.The results indicate that the XFEM is an efficient method to simulate the fracture process of concrete materials because the expression of displacement discontinuities on both sides of crack is independent of element meshes. |
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