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Domex Protect 500钢
文献作者获取了Domex Protect 500高强度装甲钢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:
![](https://epubservercos.yuewen.com/CBD420/17977545008662006/epubprivate/OEBPS/Images/77_01.jpg?sign=1739505275-0FQtXqQHvdr3bEVYru5or2ovkKD4JtA7-0-08154ac08c6c79859d564cf98c322c71)
绝热温升通过下式计算:
![](https://epubservercos.yuewen.com/CBD420/17977545008662006/epubprivate/OEBPS/Images/77_02.jpg?sign=1739505275-hkzrTKYU5aDbTk9yxqySXG6PBndGm2mv-0-ce47fa8cb0bdd6271e3aedfba2c8ddc3)
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:
![](https://epubservercos.yuewen.com/CBD420/17977545008662006/epubprivate/OEBPS/Images/77_03.jpg?sign=1739505275-i3VhDnuNWG2eEkHycyiMFHT0BfJqrzUO-0-ab634e8716e44846ce803a6eba78d7f8)
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2-143 修正的Johnson_Cook材料模型参数
![](https://epubservercos.yuewen.com/CBD420/17977545008662006/epubprivate/OEBPS/Images/77_04.jpg?sign=1739505275-VP0xzY1r2gDUlblBvTchjAGytQgEMUDO-0-4a9f9753c2e0aabde6f0359d8acd61c8)
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.