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LS Dyna

LS Dyna

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LS-Dyna Frequency Domain Problem with Viscoelastic material model

    • November 16, 2025 at 5:33 pm
      Dennis Chen
      Subscriber

      Is it possible to conduct a damped modal analysis or defined mode-based damping ratio based on the viscoelastic properties of a material (prony series terms).   There will be a duplicate question on the Ansys mechanical forum but it is NOT duplicate.   I am asking this question for both LS-Dyna and MAPDL. 

    • November 20, 2025 at 5:35 pm
      Ram Gopisetti
      Ansys Employee

      Hi, 

      In my understanding, assigning mode-based damping ratios in LS-DYNA for viscoelastic materials is limited; rather, the material's Prony series terms govern the damping behavior across all modes as part of the constitutive response. 

      Cheers, Ram

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