Weldox 700E钢

表2-270 Johnson-Cook模型参数

S DEY, T BØRVIK, O S HOPPERSTAD, et al. The effect of target strength on the perforation of steel plates using three different projectile nose shapes [J]. International Journal of Impact Engineering, 2004, 30:1005-1038.

文献作者获取了Weldox 700E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:

绝热温升通过下式计算:

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:

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2-271 Modified_Johnson_Cook材料模型参数

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.