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Armox 560T钢
表2-121 *MAT_MODIFIED_JOHNSON_COOK模型参数
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MICHAEL SALEH, LYNDON EDWARDS. Evaluation of a Hydrocode in Modelling NATO Threats against Steel Armour [C]. 25th International Symposium on Ballistics, Beijing, 2010.
文献作者获取了Armox 560T钢的Modified_Johnson_Cook材料模型参数,该模型不需要单独的状态方程,考虑了应变率效应和材料的破坏,其本构关系表达式为:
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绝热温升通过下式计算:
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式中,χ是塑性功转化为热量的转化系数。
失效模型采用CL模型:
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除了CL失效准则外,还采用基于温度的失效准则:Tc=0.9Tm,即当材料温度达到熔化温度的90%时,就删除该单元。
表2-122 修正的Johnson-Cook模型参数
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BΦRVIK T, S DEY, A H CLAUSEN. Perforation resistance of five different high-strength steel plates subjected to small-arms projectiles [J]. International Journal of Impact Engineering, 2009. 36(7):948-964.