Abaqus - Does anyone familiar with creep and stress relaxation Abaqus simulation for plastic?

Hello all,


What's the difference between *CREEP with LAW = STRAIN and *VISCOELASTIC with LAW = STRAIN? Which one is better for plastic? Can anyone give suggestions regarding general procedures and methods of creep and stress relaxation analyses for plastic materials?

Thanks very much for any of your comments and hints provided!


Best regards,
Zhibo

Abaqus ​​​​​​​