Nearly Incompressible Large Deformation Analysis using 4-node Tetrahedral Strain Smoothing Element (SSE-T4)

Abstract

A novel finite element formulation using 4-node tetrahedral elements is presented for large deformation analysis of nearly incompressible solids. The present method is a straightforward extension of the strain smoothing element (SSE) or the edge center-based SSE (EC-SSE) using selective reduced integration (SRI) to avoid volumetric locking. The deviatoric strain distribution of the present method is piecewise linear, whereas the volumetric one is piecewise constant. The suppression effect of spurious low-energy modes and pressure checkerboarding with the present method will be discussed at the conference.