Simulation of Impact Penetration and Perforation of Metal Targets Using the Smoothed Particle Galerkin Method
Publication: Journal of Engineering Mechanics
Volume 144, Issue 8
Abstract
This paper applies the smoothed particle Galerkin (SPG) method to the analysis of penetration and perforation of metal targets. The SPG weak form is integrated using the direct nodal integration (DNI) technique with a nonresidual penalty–type stabilization term derived from strain smoothing. An adaptive anisotropic Lagrangian kernel is used to model the large deformation in the penetration and perforation processes. To model material breakup and fragmentation while avoiding potential spurious self-healing of meshfree approximations used in the failure analysis, a strain-based bond failure mechanism is implemented and the sensitivity to the failure criterion is numerically investigated. Two experiments are analyzed using the SPG formulation. The numerical results are compared with the experimental data to evaluate the effectiveness of the present method. The convergence behavior of the SPG formulation is also studied.
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Acknowledgments
The authors Dr. John O. Hallquist of Livermore Software Technology Corporation for his support of this research. The suggestions and comments provided by Dr. Len Schwer through private communications are also highly appreciated.
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Published In
Journal of Engineering Mechanics
Volume 144 • Issue 8 • August 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Sep 15, 2017
Accepted: Dec 28, 2017
Published online: May 17, 2018
Published in print: Aug 1, 2018
Discussion open until: Oct 17, 2018
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