Using Stress Smoothing for Interlaminar Stress Distribution in Finite Element Analysis of Composite Laminates

摘要

This paper applies the finite element least-square extrapolation and smoothing technique to demonstrate its advantages in evaluation of interlaminar stress distributions in composite laminates. The analysis uses the quasi-3D finite element modeling technique and 3-D analysis using ABAQUS to investigate the stress distributions in graphite/epoxy laminates. Linear (2 point integration) and quadratic (3 point integration) least-square fits in 8-node quadrilateral and 20-node solid isoparametric elements are demonstrated.