New Numerical Strategies for Transient Interaction of Structures With Fluids and Soils

摘要

The research effort in this project constitutes a novel hybridization of techniques developed by the PIs in recent years, concerned on one hand with finite element approaches to the modeling of contact-impact phenomena in solid and structural mechanics, and on the other with eXtended Finite Element Method (XFEM) approaches which are able to advect interfaces through finite element grids without the necessity to mesh these interfaces explicitly. The work described considered situations where a finitely deforming solid interacts with an Eulerian description of a fluid or inelastically deforming solid, and also developed and demonstrated new techniques for the description of granular and/or polycrystalline media where interfaces did not require explicit gridding, but could instead by robustly treated through new stabilized enrichment techniques, not necessitating the analyst to perform costly gridding operations.