Triaxial Woven Fabric (TWF) Composites with Open Holes (Part I):Finite Element Models for Analysis

摘要

Two finite element models (Superelement 1 and Superelement 2) are developed for prediction of mechanical behavior of triaxial woven fabri (TWF) composites with open holes Superelement 1 is a 15-node superelement constructed of six identical 8-node 3-D isoparametric elemenst and three identical 4-node 2-D isoparametric laminate elements Superelement 2 is similar to the first element except that this element takes into accoumt the geometric and material properties fo the twisted yarns The assembly is done by the pseudo element technique suggested herein and the static condensatin procedure The availability of these elements allows for hte analysis of complex structures fo the triaxial fabric ewith open holes Superelement 1 can be used for the vibratin analysis with some ecomomy of computer space and time Superelement 2 can be used for detailed stress analysis and for strength prddictin Although these two elements are developed for the TWF composites with open holes they can be applicable for analytical models for other materials and structures made of other types of textile composites.