modeling epp in ls dyna

[Bradi88]

Hello.
did you happen to have to simulate the behavior of a foam such as expanded polypropylene?
in particular, do you know the parameters to be inserted in the mat83 and how do you make a define_curve?

 

[Stefano Civ]

Hi.

to define a curve, using the layout with icons (the "new"):

model--keyword--define----curve

the curves must be imported (load xy data) from .csv files

if you have the curves referred to multiple strain rates first define all curves, with number id progresivo

then create table (define--table) and the first values will be the strain rate and the second data (the "y") will be the id of the corresponding curve

eye to the units!! that are the same between curves and strain rate in the table

the parameters depend on the material, on the ls- dyna keyword manual volume 2 find everything

steak

 

[Stefano Civ]

or vedo... 2012