单向复合材料板初始屈服面的有限元分析

A FINITE ELEMENT ANALYSIS OF THE INITIAL YIELDING SURFACE OF UNIDIRECTIONAL COMPOSITES

摘要

摘要: 单向纤维增强复合材料板的强度准则研究一般可分为:1)提出合理物理假设,建立强度准则的数学表达式;2)用实验方法来直接建立单向板在应力空间中的破坏曲面;3)混合使用前两种方法,提出半经验形式的准则。

Abstract: This paper improves on the early work's modal^[1].A generalized plane strain computer programm is formulated with 8 nodes isoparameter element.The initial yield surfaces of unidirectiornally reinforced composites are obtained with the change in fiber volume fractions and the concentration factor is given under transverse loading. The results of the paper are useful without doubt to composite material designs and micro-failure mechanism analysis.