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| HYBRID MESH-FREE FINITE VOLUME DIFFERENCE METHOD FOR ELASTOPLASTIC PROBLEMS |
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Abstract To improve the precision of stresses with the mesh-free method，the stresses as well as displacements are interpolated independently. The whole domain is divided into boundary-domain and inside-domain. For the nodes on the boundary，the mesh-free finite volume method is used to establish the discrete equations. For the other nodes inside the domain，the mesh-free finite difference method is employed to discretize the gradients of stress node by node. Under the hypothesis of the small deformation，the hybrid mesh-free finite volume difference method for elasto-plastic analyses is proposed based on the incremental constitutive equations. The course of tunnel excavation is stimulated. Numerical examples show that the proposed incremental hybrid mesh-free finite volumetric difference method has high precision and efficiency，moreover it is of some practical value.
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Received: 17 January 2008
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MAO Yuting1, 2, HE Manchao1, 2, LIU Fangzhou3, BAI Xing4, YANG Xiaojie1, 2, TAO Zhigang1, 2*. Development and application of a large-scale physical model system for tunnel creep testing[J]. , 2026, 45(6): 1627-1638. |
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