Learning Forum

[Reno Genest]

Hello Ahmet,

I don't think multilinear isotropic hardening and Hill yield combined with orthotropic elasticity is supported in Explicit Dynamics and LS-DYNA. In LS-DYNA, you can open the input.k file in a text editor to check what material model that is used.

At Ansys 2023R2, there is a new orthotropic strength material model for Explicit Dynamics:

https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v232/en/exd_ag/adyn_ortho_yield_model.html



You can define orthotropic strength coefficients (A11 - A66) along with a master Stress-Plastic strain curve. See image above.

You will find  more information here:

https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v232/en/adyn_comp/adyn_comp_str_hard.html

There is information on how to obtain and calculate the coefficients here:

https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v232/en/adyn_comp/adyn_comp_plasticity_params.html

This information is in the Composite modelling guide for Autodyn:

https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v232/en/adyn_comp/adyn_comp.html

This model can be combined with orthotropic elasticity.

 

In LS-DYNA, *MAT_PAPER (*MAT_274) could be used. Here is an excerpt from the LS-DYNA User Manual Vol II:

 

You can download the LS-DYNA manuals here:

https://lsdyna.ansys.com/manuals/

Note that *MAT_PAPER is not available in Ansys WB yet, but you can include it in your model using a command snippet or using the Keyword Manager. You can use *PART_COMPOSITE to build the composite layup with *MAT_PAPER using a command snippet as well.

Let me know how it goes.

 

Reno.