An example for USDFLD Subroutine in Abaqus
Here, I explain how to use the USDFLD subroutine in Abaqus. This subroutine is useful to assign material properties based on the variables that are important to us. Some people might think using UMAT is for assigning material properties that are not correct. In fact, if we need to define the behaviour of a material, we need to use UMAT. Otherwise, Using USDFLD is easier and in some cases, it is more useful. It is true that most of the codes that are written in USDFLD can be used in UMAT code but using UMAT code is more complex which is not necessary in many cases. I have tried to provide the general information of this code to help you in understanding this subroutine. In addition, in the PowerPoint file, you can find the introduction of this method (you can find it on the Website). If you think you need more background it might be a good idea to see the other video about the subroutine.
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