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Weldox 500E钢
文献作者获取了Weldox 500E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:
![](https://epubservercos.yuewen.com/CBD420/17977545008662006/epubprivate/OEBPS/Images/106_01.jpg?sign=1739678694-lG0wWihBzqeOeB1Scv1Sde9C5MGSia3Y-0-1b41e323d58bd46ef632f5f1d58caf2a)
绝热温升通过下式计算:
![](https://epubservercos.yuewen.com/CBD420/17977545008662006/epubprivate/OEBPS/Images/106_02.jpg?sign=1739678694-dJNDBmZVKjONqctU03Z02WhRQER3rqTi-0-5beef29550afee2303dafe076b7b90ce)
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/106_03.jpg?sign=1739678694-MXw9jqgoVvxF43LC344XX0XUeEsC2G0o-0-28ecd690930443465c490cb066cf6e97)
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2-269 Modified_Johnson_Cook材料模型参数
![](https://epubservercos.yuewen.com/CBD420/17977545008662006/epubprivate/OEBPS/Images/106_04.jpg?sign=1739678694-ZlawjpNXXQX1kQEZL8xeNww1dDot3bGl-0-004cfe70f79bf2ed166d3e3d80414b15)
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.