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Numerical Determination on Effective Elastic Moduli of 3-D Solid with a Large Number of Microcracks using FM-DBEM

Hongtao Wang1,2, Haitao Wang2, Lie Jin2, Zhenhan Yao3
Corresponding author.
Tel: +86 10 6278 4825; fax: +86 10 6279 7136. Email: wanghongtao@tsinghua.edu.cn
Institute of Nuclear & New Energy Technology, Tsinghua University, Beijing, 100084, P. R. China.
School of Aerospace, Tsinghua University, Beijing, 100084, P. R. China.

Computer Modeling in Engineering & Sciences 2013, 94(6), 529-552. https://doi.org/10.3970/cmes.2013.094.529

Abstract

Since only the boundary of the analyzed domain needs to be discretized, the boundary element method (BEM) inherently has the advantages of solving crack problems. In this paper, a micromechanics BEM scheme is applied to determine the effective elastic moduli of three-dimensional (3-D) solids containing a large number of parallel or randomly oriented microcracks. The 3-D analyses accelerated by the fast multipole method were carried out to investigate the relations between the effective elastic moduli and the microcrack density parameter. Numerical examples show that the results agree well with the available analytical solution and known micromechanics models. From the numerical examples, we can see that the FM-DBEM inherits the virtue of high accuracy from BIE besides dimension reduction. It makes the method be a promising approach for analyzing elastic materials with numerous microcracks of various shapes.

Keywords

dual boundary element method, fast multipole, large-scale, microcrack, effective elastic moduli, stress intensity factor

Cite This Article

Wang, H., Wang, H., Jin, L., Yao, Z. (2013). Numerical Determination on Effective Elastic Moduli of 3-D Solid with a Large Number of Microcracks using FM-DBEM. CMES-Computer Modeling in Engineering & Sciences, 94(6), 529–552.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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