Representing ductile damage with the dual domain material point method

Journal Article · Mon Dec 14 00:00:00 EST 2015 · Computer Methods in Applied Mechanics and Engineering

DOI:https://doi.org/10.1016/j.cma.2015.12.006· OSTI ID:1255952

Long, C. C. ^[1]; Zhang, D. Z. ^[1]; Bronkhorst, C. A. ^[1]; Gray, III, G. T. ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

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.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1255952
• Alternate ID(s): OSTI ID: 1398148
• Report Number(s): LA-UR-15-24649; PII: S0045782515004016
• Journal Information: Computer Methods in Applied Mechanics and Engineering, Vol. 300, Issue C; ISSN 0045-7825
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
97 MATHEMATICS AND COMPUTING
material point method
ductile material failure
particle methods