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论文类型：期刊论文

发表时间：2017-04-01

发表刊物：ACTA MECHANICA SOLIDA SINICA

收录刊物：SCIE、EI、CSCD

卷号：30

期号：2

页面范围：123-136

ISSN号：0894-9166

关键字：SBFEM Stress singularity; Boundary conditions; Side-faces; Dam-reservoir-foundation; interaction; Thermal stress

摘要：A refined global-local approach based on the scaled boundary finite element method (SBFEM) is proposed to improve the accuracy of predicted singular stress field. The proposed approach is carried out in conjunction with two steps. First, the entire structure is analyzed by employing an arbitrary numerical method. Then, the interested region, which contains stress singularity, is re-solved using the SBFEM by placing the scaling center right at the singular stress point with the boundary conditions evaluated from the first step imposed along the whole boundary including the side-faces. Benefiting from the semi-analytical nature of the SBFEM, the singular stress field can be predicted accurately without highly refined meshes. It provides the FEM or other numerical methods with a rather simple and convenient way to improve the accuracy of stress analysis. Numerical examples validate the effectiveness of the proposed approach in dealing with various kinds of problems. (C) 2017 Published by Elsevier Ltd on behalf of Chinese Society of Theoretical and Applied Mechanics.