Please have a look on this book "Introduction to computational plasticity" you will find Abaqus umat files for this material model. You need after that to get Autodyna source user material code and modify with same way.

Take care of the arrangement of stress components of the two codes.

Thanks

Alaa

Karan Gupta if you take a look in the appendices of the PhD thesis from Long Nguyen, he provides a fortran script that was used for a user-defined material model. You should be able to modify that script for your plasticity model pretty simply.

Download here: http://researchbank.rmit.edu.au/view/rmit:161572

Hi Karan,

Aside from the suggested answers, you can also use AceGen in Mathematica.

http://symech.fgg.uni-lj.si/User/AceGenPrint.pdf

Best,

Romik

A warm thanks to Alaa Elsisi's, Shannon Ryan and Romik Khajehtourian Sir I shifted to Abaqus to write VUMAT code as it was a little simpler and more material is available, I wrote isotropic hardening plasticity code in VUMAT for high strain rates and dynamic yielding using Taylor Impact test, fortunately, it is working and providing me the best plasticity model, but as of now I need to compare Zerilli Armstrong and Steinberg Guinan model in Abaqus with my model but got stuck how to implement these 2 models in Abaqus. As I have all required parameters but If you have any ideas about how to implement then please suggest, It will be highly appreciated. Thanks

http://storage.ansys.com/doc_assets/release_notes/Release_Notes_190.pdf

Karan Gupta, Nice Topic.

Following.

@Abdelkader Mohamed Elsayed, Thanks a lot for your valuable information and comments, In Ansys yes these 2 models are available and my preliminary results are from Ansys if possible can I get to know whether we can apply in Abaqus or not. Thanks a million.