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Static test for rubber model in LS DYNA

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  • Static test for rubber model in LS DYNA

    I'm a beginner in the implicit world and looking for any advise about the implicit setup.
    I am trying to perform a static load analysis on a rubber part using the material model *MAT_HYPERELASTIC_RUBBER but I am running into "failed to find equuilibrium" error very often...
    I am using Hex elements and have tried element formulations -1 and -2 as recommended by a source from Dynamore. (link - https://www.dynamore.se/en/resources..._modelling.pdf)

    The loading rate is 10mm/min and the test is for 3 minutes. So I've given DTMAX = 180 (seconds), DTMIN = 0.001 and DT0 = 0.1. But not getting the equilibrium. Is this the wrong way?

    Further, I came across another source which says that the LS DYNA implicit functionality is not available for *MAT_077. Is this true? In that case, how do we perform the static case?
    (Link - https://www.dynasupport.com/howtos/i...e-for-implicit)

    Thanks in advance.

    Best Regards,
    Heramb
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