The Inelastic Strain Rate subnode allows you to provide inelastic strain contributions to the material models Linear Elastic Material, Layered and Hyperelastic Material, Layered on a variety of formats as in External Strain. Here, however, the inelastic contribution is given as a rate, and the total inelastic contribution is computed by integrating this rate in time.

See the documentation for the Inelastic Strain Rate node in the Layered Shell chapter.

Physics tab with Linear Elastic Material, Layered node selected in the model tree: