What parameters do I need to change in the composite?

Eli_B

I simulated the impact of a ball on a laminate. There must be a delamination, but I need to modify the force/displacement graph. I have used M25 COMPSHELL as the material, hence the Tsai Wu criterion. What parameters do I need to change so that I can have the force/displacement graph as attached? Thank you

Rogerio Nakano_21179

Hi

You will not be able to have delamination with only the shell mesh and material model.

one option is to add /FAIL/LAD_DAMA to the material.

/FAIL/LAD_DAMA: Describes the Ladeveze failure model for delamination (interlaminar fracture)

 

https://2021.help.altair.com/2021/hwsolvers/rad/topics/solvers/rad/fail_lad_dama_starter_r.htm?zoom_highlightsub=%2Ffail%2Flad

 

An alternative approach is to  estimate delamination using connector element between the shell plies.

Also, per your model, you are using /RWALL/SPHER. Maybe you need to add friction as well.

 

I hope this is helpful

Regards