Yes, I can help you with that. The `usdfld` subroutine in Abaqus allows you to define user-defined material behavior, including the Johnson-Cook damage model. What specifically would you like to know about implementing the Johnson-Cook damage model using the `usdfld` subroutine?
Hello bro, is there a simple example of the subroutine usdfld about johnson-cook damage? This one is about tensile testing of metals of the subroutine usdfld about johnson-cook damage?