Hello dear helpers,
i have problems to simulate the behaviour of a crushable foam. I have force displacement as input, convert to stress-strain, input the values to simulation and then the force-displacement from simulation does not match the experiment. Probably i make a mistake in the conversion or do not correctly input the stress vs volumetric strain for ls-dyna crushable foam.
To better understand the problem I would like to plot for one element in the middle of my foam block the stress vs volumetric strain. I activated extend_binary and STRFLG=1, but I can not find volumetric strain ln(V) in the output. Can someone give me an advice where to find it?
I could have found it. Unfortunately it is empy, only zero values.... not sure why.
I dont get it... how can i plot volumetric strain ln(V)?
You need to include the elements you want to plot in *Database_history_solid. The strain flag allows you to plot fringe data but not plot strain.
Some old threads on the topic
https://feassistant.com/forums/ls-dyna/strain-plot/
https://feassistant.com/forums/ls-dyna/stress-vs-time-and-strain-vs-time/