| Autor: |
Crawford, Paula, Rainey, Kevin, Rightley, Paul, Hammerberg, J. E. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2004, Vol. 706 Issue 1, p545-548, 4p |
| Abstrakt: |
The role of friction in high strain-rate events is not well understood despite being an important constitutive relationship in modern modeling and simulation studies of explosive events. There is a lack of experimental data available for the validation ofmodels of dynamic sliding. The Rotating Barrel Gas Gun (RBGG) is a novel, small-scale experimental facility designed to investigate interfacial dynamics at high loads and sliding speeds. The RBGG utilizes a low-pressure gas gun to propel a rotating annular projectile towards an annular target rod. Upon striking the target, the projectile imparts both an axial and a torsional impulse into the target at a timescale relevant to explosively-driven events. Resulting elastic waves are measured using strain gages attached to the target rod. The coefficient of friction is obtained through an analysis of the resulting strain wave data. Initial experiments have been performed using dry copper/copper interfaces. We find that the measured coefficient of friction can evolve significantly over a 30 μs event. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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