Thus, the current configuration at the start of the reactivation step is the new initial configuration for the element. This result allows reactivation to be done immediately, without an adverse effect on the smoothness of the solution.Īfter reactivation the strains and the deformation gradients are based on the displacements subsequent to the moment of reactivation, rather than on their total displacements. Since these elements are reactivated in a virgin state (i.e., with zero stress), they exert zero nodal forces on the rest of the model. Alternatively, reactivation in a nonvirgin state can be specified, as described below. This configuration depends on whether a small- or large-displacement analysis is being conducted. They are reset to an “annealed” state (zero stress, strain, plastic strain, etc.) in the configuration in which they lie at the start of the reactivation step. When stress/displacement elements are reactivated in a strain-free state, they become fully active immediately at the moment of reactivation (the start of the step in which they are reactivated).
Element and contact pair removal and reactivation Element and contact pair removal and reactivationĮlement and contact pair removal/reactivation:Ĭan be used to simulate removal of part of the model, either temporarily or for the remainder of the analysis Īllows reactivation of elements strain-free or with strain Ĭan be used to save computational time when a contact pair is not needed Ĭan be used only in general analysis steps andĬan be used in a restart analysis only if it was used or activated in the original analysis.