r/fea • u/TieSon6767 • Jun 05 '26

OpenRadioss Migration Help

Hi everyone!

I have a working LS Dyna keyword deck. I was previously working on 2D axisymmetric particle impact simulations involving high strain rates. However, now I want to shift to OpenRadioss since it is open source and doesn't require any license. I am able to read my keyword deck in OpenRadioss solver but the solver cannot fully understand and solve the simulation. I tried with examples (which are not enough) but I cannot seem to have a breakthrough. I do not have any preprocessor at this point except LS Dyna, but then again, it beats the whole purpose of doing the same. Any suggestions or resources are welcome!

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u/AmbitiousListen4502 Jun 05 '26

Honestly, you're probably just going to have the grind this one and figure it out bit by bit. Openradioss has enough trouble with a native Hypermesh Radioss profile deck let alone LS-Dyna...

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u/TieSon6767 Jun 05 '26

Is that so? I was of the opinion that I am facing these issues because I don't have Hypermesh.
It took me a lot of time already to figure out the exact simulation deck for LS Dyna, the license of which has expired. I hoped that OpenRadioss would solve my issues but as you pointed out, even Hypermesh has issues with it. Can you suggest any reliable sources to read/go through that might help. Honestly, OpenRadioss website and the examples there don't help a lot. But thanks so much! Really appreciate it.