# Two-layer viscoplasticity

 The two-layer viscoplastic model: is intended for modeling materials in which significant time-dependent behavior as well as plasticity is observed, which for metals typically occurs at elevated temperatures; consists of an elastic-plastic network that is in parallel with an elastic-viscous network (in contrast to the coupled creep and plasticity capabilities in which the plastic and the viscous networks are in series); is based on a Mises or Hill yield condition in the elastic-plastic network and any of the available creep models in Abaqus/Standard (except the hyperbolic creep law) in the elastic-viscous network; assumes a deviatoric inelastic response (hence, the pressure-dependent plasticity or creep models cannot be used to define the behavior of the two networks); is intended for modeling material response under fluctuating loads over a wide range of temperatures; and has been shown to provide good results for thermomechanical loading. The following topics are discussed:
 Related Topics About the material library Combining material behaviors Inelastic behavior In Other Guides *ELASTIC *PLASTIC *VISCOUS Defining the viscous component of a two-layer viscoplasticity model

ProductsAbaqus/StandardAbaqus/CAE