An Elastic Plastic Contact Model with Strain Hardening for the LAMMPS Granular Package

Technical Report · Sun Mar 01 00:00:00 EST 2015

DOI:https://doi.org/10.2172/1177388· OSTI ID:1177388

Kuhr, Bryan ^[1]; Brake, Matthew Robert ^[2]; Lechman, Jeremy B. ^[3]

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1. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Component Science and Mechanics
3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Nanoscale and Reactive Processes

The following details the implementation of an analytical elastic plastic contact model with strain hardening for normal im pacts into the LAMMPS granular package. The model assumes that, upon impact, the co llision has a period of elastic loading followed by a period of mixed elastic plas tic loading, with contributions to each mechanism estimated by a hyperbolic seca nt weight function. This function is implemented in the LAMMPS source code as the pair style gran/ep/history. Preliminary tests, simulating the pouring of pure nickel spheres, showed the elastic/plastic model took 1.66x as long as similar runs using gran/hertz/history.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1177388
• Report Number(s): SAND2015-1974; 579369
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE