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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=1739976013-prpsaRTSlPh5J3fgjTlc2J3W6yohC8Y7-0-130aad4cc2058639ef66977b07887723)
绝热温升通过下式计算:
![](https://epubservercos.yuewen.com/CBD420/17977545008662006/epubprivate/OEBPS/Images/77_02.jpg?sign=1739976013-R0jY97kTYhSmWOL2bOTf1e2n0vx33Tcf-0-762c9bedbb28892cbd648c03fe7ef183)
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=1739976013-Dg7O9K0QKDFC6Z1G9ffvzxkU4ri6kiRn-0-f0d247b3b87913f24e481c9d6878b4f8)
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=1739976013-rajC49YT7n26VhpjatlZawTz1WlNmaLX-0-35360cef079323cdabb4a5de49c7a44f)
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.