Application of the 10-node composite tetrahedral framework to impact and fracture via mesh adaptivity
Please login to view abstract download link
We have extended the recently reformulated 10-node composite tetrahedral finite element for solid mechanics. A deleterious soft mode, common to both the quadratic and composite tetrahedral element with constant pressure formulations was effectively stabilized through a novel convex energy penalty function that enables the formulation to be viable for shock simulation. Recent work focused on extending the requisite stabilization scheme to a stressed reference configuration for mesh adaptivity. File-based workflows illustrate new mapping schemes with respect to the balance of mass, momentum, and energy. Current work focuses on in-core adaptivity with increments in contact resolution, element robustness, and the extension to thermomechanical coupling and phase-field formulations for crack initiation and propagation. These new methods will be illustrated for numerous examples including the impact of soft targets and shear-dominated failure. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.
