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Representing ductile damage with the dual domain material point method [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2015.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
pages 611-627 : digital, PDF file
Additional Creators
Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
In this study, we incorporate a ductile damage material model into a computational framework based on the Dual Domain Material Point (DDMP) method. As an example, simulations of a flyer plate experiment involving ductile void growth and material failure are performed. The results are compared with experiments performed on high purity tantalum. We also compare the numerical results obtained from the DDMP method with those obtained from the traditional Material Point Method (MPM). Effects of an overstress model, artificial viscosity, and physical viscosity are investigated. Our results show that a physical bulk viscosity and overstress model are important in this impact and failure problem, while physical shear viscosity and artificial shock viscosity have negligible effects. A simple numerical procedure with guaranteed convergence is introduced to solve for the equilibrium plastic state from the ductile damage model.
Report Numbers
E 1.99:la-ur--15-24649
la-ur--15-24649
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Note
Published through SciTech Connect.
12/14/2015.
"la-ur--15-24649"
": S0045782515004016"
Computer Methods in Applied Mechanics and Engineering 300 C ISSN 0045-7825 AM
C. C. Long; D. Z. Zhang; C. A. Bronkhorst; G. T. Gray, III.
Funding Information
AC52-06NA25396
View MARC record | catkey: 24087421