Atomistic Modeling of Spall Response in a Single Crystal Aluminum
R. R. Valisetty1, A. M. Dongare2, A. M. Rajendran3, R. R. Namburu1
CMC-Computers, Materials & Continua, Vol.44, No.1, pp. 23-57, 2014, DOI:10.3970/cmc.2014.044.023
Abstract Materials used in soldier protective structures, such as armor, vehicles and civil infrastructures, are being improved for performance in extreme dynamic environments. Accordingly, atomistic molecular dynamics simulations were performed to study the spall response in a single crystal aluminum atom system. A planar 9.6 picoseconds (ps) shock pulse was generated through impacts with a shock piston at velocities ranging from 0.6 km/s to 1.5 km/s in three <1,0,0>, <1,1,0>, and <1,1,1> crystal orientations. In addition to characterizing the transient spall region width and duration, the spall
response was characterized interms of the traditional axial stress vs. axial… More >
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