The Inelastic Strain Rate subnode allows you to provide inelastic strain contributions to the material models Layered Linear Elastic Material and Layered Hyperelastic Material 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 Layered Linear Elastic Material node selected in the model tree: