Hi.

I am working on the simulations of impact. I have only found a set of constants for AL 6061-T6's JC failure model in the literatures. (D1=-0.77; D2=1.45; D3=-0.47; D4=0; D5=1.6) 

However, the simulation results using these constants were not good.

Who can do me a favour and kindly provide another  set of constants (D1~D5)? Or, may you recommend another failure model and constants for AL 6061-T6?

Thank you very much.