说明：  一个调试成功的JOHSON-COOK模型的abaqus子程序，使用fortran语言编程。使用时注意在cae界面设置足够的非独立变量个数。以免出现不能计算。
(A subroutine of J-C module based on abaqus, which has been completely successful. pay attention that you should give the value of devpar.)