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| Numerical model for damage evolution of contact interface of solid |
| Received:February 22, 2009 Revised:June 17, 2010 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201101026 |
| KeyWord:damage evolution contact interface element failure processes numerical model |
| Author | Institution |
| 唐世斌 |
大连理工大学 岩石破裂与失稳研究所,大连 |
| 唐春安 |
大连理工大学 岩石破裂与失稳研究所,大连 |
| 梁正召 |
大连理工大学 岩石破裂与失稳研究所,大连 |
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| Abstract: |
| On the basis of the deformation and heterogeneity feature of contact interfaces of rock mass at mesoscopic level, a numerical model is proposed to simulate the damage evolution processes of contact interface. The relationships between shear stress and shear displacement with different vertical pre-existing loading indicated that damage occurred on the interface gradually at the beginning of shear loading, resulting in decrease of growth rate of shear stress. However, as the interface was fully damaged, shear stress would decrease to a certain degree, and the residual shear stress nearly kept a constant value which equal to the friction force. It also indicated that the maximum shear stresses increased with the increasing of normal stresses. The damage processes revealed that heterogeneity is the source of nonlinear deformation, and high shear stress is the reason of shear damage. Shear stress would be released at the damaged points and transfer to the crack tips. The coupling of damage, stress release and stress transfer processes run through the whole deformation history until those interface elements were damaged entirely. |
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