通过选择恰当的模型和科学的空间离散化,对SHPB加载过程进行了2D数值模拟,数值重现了帽型试样高应变条件下的绝热剪切变形历程.基于应力塌陷绝热剪切形成判据分析了材料绝热剪切变形规律;利用模拟结果的应力一时间、应变一时间曲线进行了温度场的计算,确定了剪切带的类型,计算结果与实验结果吻合.
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