Orientation Dependence in Molecular Dynamics Simulations of Shocked Single Crystals
We use multimillion-atom molecular dynamics simulations to study shock wave propagation in fcc crystals. As shown recently, shock waves along the <100> direction form intersecting stacking faults by slippage along {l_brace}111{r_brace} close-packed planes at sufficiently high shock strengths. We find even more interesting behavior of shocks propagating in other low-index directions: for the <111> case, an elastic precursor separates the shock front from the slipped (plastic) region. Shock waves along the <110> direction generate a leading solitary wave train, followed (at sufficiently high shock speeds) by an elastic precursor, and then a region of complex plastic deformation. (c) 2000 The American Physical Society.
- OSTI ID:
- 20216797
- Journal Information:
- Physical Review Letters, Vol. 84, Issue 23; Other Information: PBD: 5 Jun 2000; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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