【求助】使用Johnson_Cook模型计算抗爆柱出现问题

本人LS-DYNA弱女一枚，最近使用 JOHNSON-COOK计算一根工字型截面柱在爆炸荷载作用下响应，同样的模型使用PLASTIC-KINEMATIC材料是可以计算的，但换做JOHNSON-COOK就不行了。运行的结果是一开始计算就显示所有的shell element都失效。messag如下：
Additional dynamically allocated memory: 228689
Total: 732400
1 t 0.0000E+00 dt 4.60E-06 flush i/o buffers
1 t 0.0000E+00 dt 4.60E-06 write d3plot file
node number 169 deleted at time 4.59602E-06
node number 248 deleted at time 4.59602E-06
...
f a i l e d e l e m e n t r e p o r t time= 4.59602E-06
number of failed solid elements = 0
number of failed beam elements = 0
number of failed shell elements = 1920
number of failed tshell elements = 0
shell element 1 failed at time 4.59602E-06
shell element 2 failed at time 4.59602E-06
这是肿么回事:Q。。？？！！
哪位大神能够帮偶解决。。不胜感激！
我把自己的模型K文件放在附件里了。