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Hi all,
I'm modeling sand with MLAW6 in Radioss, but I don't know how to define these parameters (C1)?
Can you guy help me?
Hi Nancy,
The coefficients for /EOS must be determined experimentally or found by literature generally. Another way to determine that, is to calibrate the results of your simulation based on a known response, but this also require data from a physical model. So, you have to find the ones that best describe your material.
I think that search in literature for data is your best option. Any data that connect pressure and density can be used to define these coefficients.
Additionally, /MAT/LAW6 is mainly used to simulate fluids and not porous media (like sand), so it is not a good choice for this application.
I would recommend you /MAT/LAW10, /MAT/LAW21 or /MAT/LAW102 in contrast.
Finally, /EOS/POLYNOMIAL is not preferred for sand material, but /EOS/COMPACTION fits better. It is also more likely to find coefficient data for this /EOS and sand material.
Polyvios
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