Coupled Thermomechanical Modeling using Dissimilar Geometries in Arpeggio

摘要

Performing coupled thermomechanical simulations is becoming an increasingly important aspect of nuclear weapon (NW) safety assessments in abnormal thermal environments. While such capabilities exist in SIERRA, they have thus far been used only in a limited sense to investigate NW safety themes. An important limiting factor is the difficulty associated with developing geometries and meshes appropriate for both thermal and mechanical finite element models, which has limited thermomechanical analysis to simplied congurations. This work addresses the issue of how to perform coupled analyses on models where the underlying geometries and aserent and tailored to their relevant physics. Such an approach will reduce tort and enable previously developed single-physics models to be leveraged in future coupled simulations. A combined-environment approach is presented in this report using SIERRA tools, witherent options in SIERRA.