The Proceedings of The Computational Mechanics Conference
Online ISSN : 2424-2799
2005.18
Session ID : 924
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924 Large deformation elastic-plastic analysis by SMAC-SPH using Constrained Moving Least Squares Method
Hiroyuki MINAKIHirohisa NOGUCHI
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Abstract
SPH using Constramed-Moving-Least-Square Method (C-MLS) is proposed and is applied to large deformation elastic perfectly plastic analysis. The spatial approximation of SPH is less accurate due to the only 0-th order consistency. Various Kernel approximations have been enhanced for the improvement of accuracy, In this study, C-MLS interpolation that improves MLS is applied to SPH. C-MLS is an improvement over MLS in the case when the approximation function does not pass through the node. The Poisson's equation for pressure is solved to take account of incompressibility in plastic analysis. Numerical analysis of longitudinal vibrating bar and cylinder impact are demonstrated to validate the present method.
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© 2005 The Japan Society of Mechanical Engineers
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