Journal
COMPUTERS & STRUCTURES
Volume 106, Issue -, Pages 1-8Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compstruc.2012.03.012
Keywords
Limit analysis; Meshless methods; Volumetric locking; Strain smoothing; Nodal integration; Second order cone programming
Funding
- Vietnam National Foundation for Science and Technology Development (NAFOSTED) [107.02-2011.01]
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An element free Galerkin (EFG) based formulation for limit analysis of rigid-perfectly plastic plane strain problems is presented. In the paper it is demonstrated that volumetric locking and instability problems can be avoided by using a stabilized conforming nodal integration scheme. Furthermore, the stabilized EFG method described allows stable and accurate solutions to be obtained with minimal computational effort. The discrete kinematic formulation is cast in the form of a second-order cone problem, allowing efficient interior-point solvers to be used to obtain solutions. Finally, the performance of the stabilized EFG method is illustrated by considering several numerical examples. (C) 2012 Elsevier Ltd. All rights reserved.
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