弹脆性损伤理论与破坏过程的计算机模拟

本文提出了一种增量形式的受损弹脆性材料的本构关系,此关系考虑了材料与损伤两者的各向异性.而且,导出了损伤模量、有效弹性模量以及动态弹性模量等张量表达式.根据本文提出的理论和方法,给出了考虑局部损伤的结构有限元方法,并应用于模拟复合材料板的损伤一破坏过程.最后,受拉伸的带中心圆孔的玻璃纤维布/环氧树脂复合材料板损伤过程的计算结果用等损伤线图形显示出来.

AN ELASTO-BRITTLE DAMAGE THEORY AND COMPUTER-SIMULATION FOR DAMAGE- FAILURE PROCESS

A damaged elasto-brittle material constitutive relation in incremental form which consideres anisotropy of both material and damage is presented in this paper.The formula calculating the tensors (including the damage modulus,the effective elastic modulus and the kinetic elastic modulus as we-ll) are also derived. And based on this elastc-brittle damage theory and me-thod,the structural finite element procedure- taking local damage into account and its application to simulate damage-failure process of composite plate has been given. Finally the calculating results of the damage process of a glass-fiber woven/epoxy composite plate with a central holl under tensile lo-ading have been shown in the form of equi-damage lines and their change.