Find here an overview of viscoelastic material models in LS-DYNA:
*MAT_VISCOELASTIC (*MAT_6)
*MAT_GENERAL_VISCOELASTIC (*MAT_76)
– Can be used for rate-dependent, rubber-like materials (Feng)
*MAT_SOFT_TISSUE_VISCO (*MAT_91)
– Ligaments, tendons, fascia
– Mooney-Rivlin matrix reinforced by fibers
*MAT_QUASILINEAR_VISCOELASTIC (*MAT_176)
– Biological soft tissues such as brain, skin, kidney, spleen, etc. (Feng)
*MAT_VISCOELASTIC_HILL_FOAM (*MAT_178)
– Highly compressible, rubber-like materials (Feng, Hallquist)
*MAT_RATE_SENSITIVE_COMPOSITE_FABRIC (*MAT_158)