Abaqus UMAT subroutine for viscoelastic isotropic model (Voigt) under implicit analysis.
The Voigt viscoelastic model is implemented in the subroutine.
irfancn/Abaqus-UMAT-viscoelastic
Abaqus UMAT subroutine for viscoelastic model (Voigt) for implicit analysis.
FortranMIT