胡志强

个人信息Personal Information

副教授

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:水利工程系

学科:水工结构工程

办公地点:大连理工大学建设工程学部综合试验4号楼401室

联系方式:办公电话:0411-84709552 Email: huzhq@dlut.edu.cn

电子邮箱:huzhq@dlut.edu.cn

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A refined global-local approach for evaluation of singular stress field based on scaled boundary finite element method

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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.