A reined global-local approach for evaluation of singular stress ield based on scaled boundary inite element method

【Author】

Lin Pang;Gao Lin;Zhiqiang Hu;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology;Institute of Earthquake Engineering,Faculty of Infrastructure Engineering,Dalian University of Technology;

【Institution】

State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology;Institute of Earthquake Engineering,Faculty of Infrastructure Engineering,Dalian University of Technology;

【Abstract】

A reined global-local approach based on the scaled boundary inite element method(SBFEM) is proposed to improve the accuracy of predicted singular stress ield. 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 irst step imposed along the whole boundary including the side-faces. Beneiting from the semi-analytical nature of the SBFEM, the singular stress ield can be predicted accurately without highly reined 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.

【Keywords】

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

References

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Total: 39 articles

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  • [3] LI Shang-ming, LIANG Hong, LI Ai-min School of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, China,, A SEMI-ANALYTICAL SOLUTION FOR CHARACTERISTICS OF A DAMRESERVOIR SYSTEM WITH ABSORPTIVE RESERVOIR BOTTOM, Journal of Hydrodynamics, 2008 (06)
  • [4] Shenshen Chen;Qinghua Li;Yinghua Liu;Zhiqing Xue;College of Civil Engineering,Hunan University of Technology;Department of Engineering Mechanics,School of Aerospace,Tsinghua University;, MODE III 2-D FRACTURE ANALYSIS BY THE SCALED BOUNDARY FINITE ELEMENT METHOD, Acta Mechanica Solida Sinica, 2013 (06)

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