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Friction and Wear Models of High
Energy Ballistic Impact Wear Events
Chet VanGaasbeek
Rensselaer Polytechnic Institute
Fall 2013 – Friction Wear and
Lubrication of Materials
Micrometeoroids and Orbital Debris
(MMOD)
• Large concern for space
exploration.
• Requirement to aggressively
research material and
composite combinations to
protect spacecraft/satellite
and astronauts.
• Short term hypervelocity
large particle impact vs long
duration abrasive wear in
space environment.
• Typically experiment +
model/FEA based research.
Credit to NASA jsc.nasa.gov
Modeling Approach
• High fidelity material models
necessary
• Johnson-Cook Plasticity –
Nonlinear plastic model based
partly on transition and melt
temperatures.
• Johnson-Cook Damage and
damage evolution – describes
material evolution by damage
parameter for high
stress/strain/temp.
• Mie-Gruneisen equation of state –
Model pressure in a shockcompressed solid.
• Smoothed Particle Hydrodynamics
– Smeared material model at high
strain to allow material to ‘flow’.
Video!