Reply To: The equation of MAT58 in LS-DYNA

[linjun]

Dear Pedram, I have encountered a new problem in understanding MAT58 model, and I would like to ask you about it.
The specific problem is: I'm modeling the through-thickness direction bending, but there seem to be too many parameters. For example, EPSF EPSR, TSMD GM23, GM31, TAU2, GAMMA2, TAU3, GAMMUA3. Do I have to enter all these parameters?
I tried a few things, input TAU23(31 also),GAMMA23 (31),GM23(31) and SC23(31) can simulate a suitable curve, but I'm not sure if I need EPSF,EPSR,TSMD.
Thank you very much for your patient answer