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Mathematical Problems in Engineering
Volume 2014, Article ID 808359, 14 pages
http://dx.doi.org/10.1155/2014/808359
Research Article

A Modified SPH Method for Dynamic Failure Simulation of Heterogeneous Material

1School of Civil, Environmental, and Ming Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
2Institute of Geotechnical and Underground Engineering, Beijing University of Technology, Beijing 100124, China
3School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798

Received 9 January 2014; Accepted 15 February 2014; Published 22 April 2014

Academic Editor: Yumin Cheng

Copyright © 2014 G. W. Ma et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A modified smoothed particle hydrodynamics (SPH) method is applied to simulate the failure process of heterogeneous materials. An elastoplastic damage model based on an extension form of the unified twin shear strength (UTSS) criterion is adopted. Polycrystalline modeling is introduced to generate the artificial microstructure of specimen for the dynamic simulation of Brazilian splitting test and uniaxial compression test. The strain rate effect on the predicted dynamic tensile and compressive strength is discussed. The final failure patterns and the dynamic strength increments demonstrate good agreements with experimental results. It is illustrated that the polycrystalline modeling approach combined with the SPH method is promising to simulate more complex failure process of heterogeneous materials.