Learning Forum

[ah3616]

I have a question in regards to utilizing dynain files for my simulations in LSDYNA. We are running a quasi static expansion model which causes stress/strain in the material. I then want to use the quasi static model results as my input for an FSI model. I tried to utilize the dynain file to consider the stressed state of the solid material in my FSI model. However, when I used the dynain file as my solid mesh input file it caused major slowing in runtime. Upwards of 20x slower and I do not have the computing time for that.

Is there anything that can be done to help fix this increase in runtime? As soon as I used the generic keyword file for the element/node locations without the stress/strain information - my simulation ran quickly (aside from some free node issues).

[igandiko]

Hello, which version are you running? Have you tried a newer or dev version of the solver? Have you tried to reduce the contents of dynain file, just as a test, to narrow down the issue? Comparing the mes00* files, is there a drop in timestep between the two runs (with dynain vs without dynain)?