I am trying to use material model 58 of ls dyna to simulate a drop tower test on a carbon fibre epoxy composite. However i am getting poor simulation results with very high eroded internal energy values for composite. My parameters are as follows
Hollow composite cylinder (with quad shell elements) of thickness 5mm with a mass of about 120g.
Impactor of weight 82 kg with impact vel of 6 m/s (direction along the longitudinal of composite cylinder)
material model in ls dyna : MAT 58
Currently am using Contact Auto single surface. Can i use any other contact algorithm and why?
Also how do i determine the optimum value of ERODS in MAT 58?
Answers to these queries and other suggestions are solicited
regards
Suhas