We simulate triaxial deformation of a single crystal iron at \(10^6\ \hbox {s}^{-1}\) strain rate to investigate the void evolution dynamics in a single crystal iron. We find that the peak tensile pressure is very close to the spall strength of the single crystal iron. As strain rate decreases, the peak tensile pressure approaches the void nucleation threshold of the single crystal iron. The damage of the single crystal iron takes place due to nucleation, growth and coalescence of many voids and not due to the growth of a single void. The void growth rate is very high indicating rapid growth of the voids once nucleated.

中文翻译：

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高应变率下单晶铁的损伤演化：分子动力学研究

我们模拟单晶铁在\(10^6\ \hbox {s}^{-1}\)应变率下的三轴变形，以研究单晶铁中的空隙演化动力学。我们发现峰值拉伸压力非常接近单晶铁的剥落强度。随着应变速率降低，峰值拉伸压力接近单晶铁的空隙形核阈值。单晶铁的损坏是由于许多空隙的成核、生长和聚结而不是由于单个空隙的生长而发生的。空隙增长率非常高，表明一旦成核，空隙就会迅速增长。