Transcript Brief_inclass_ppt.pptx

Study of Impact Wear due to
Micrometeoroid Impact in
Spacecraft and Spacesuit Materials
Micrometeoroid scale (approx)
http://upload.wikimedia.org/wikipedia/commons/f/fc/Micro
meteorite.jpg
Chet VanGaasbeek
Friction, Wear, and Lubrication of Materials
Fall 2013
Large Challenge in Space Exploration
• Hypervelocity impact
events (>10 km/s).
• Distribution of
micrometeoroid sizes
pose varying threats
(1 μm – 1 mm dia)
• Typically less than
1gm mass.
Analysis Approach
• Model using FEA
(Abaqus/Explicit)
• Coupled
Eulerian/Lagrangian
approach
• Smoothed Particle
Hydrodynamic approach
• Very Short timescale
• Vary friction, measure
impact wear in terms of
delta-KE, loss of material.
Compare to test results.