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About definition of Anisotropic plasticity for Explicit

About definition of Anisotropic plasticity for Explicit

About definition of Anisotropic plasticity for Explicit

(OP)
Dear group,

I am simulating sheet forming with high anisotropic material. I used *Potential option in plasticity. Abaqus requires input six values for *Potential such as: R11, R22, R33, R12, R13, R23. I really don't know how can find those values. I did tensile testings and got normal anisotropic coefficient R and planar anisotropic coefficient delta R. Could you tell me calculation those values from R or delta R?

For my material, Do i need to define both anisotropic elasticity and anisotropic plasticity or only one ?

Any suggestion is greatly appreciate.
Regards
Tung   

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