复合材料层合板临界屈曲载荷分散性

被引：12

作者：

卢子兴

王晓英

俸翔

机构：

[1] 北京航空航天大学航空科学与工程学院

来源：

复合材料学报 | 2013年 / 30卷 / 01期

关键词：

复合材料层合板; 临界屈曲载荷; 分散性; 随机场; Monte-Carlo模拟;

D O I：

10.13801/j.cnki.fhclxb.2013.01.026

中图分类号：

TB33 [复合材料];

学科分类号：

0805 ; 080502 ;

摘要：

基于随机场理论,将纤维和基体性能以及纤维体积分数作为随机场变量,利用局部平均法对随机场进行离散。结合MATLAB与ANSYS的PDS模块对复合材料层合板临界屈曲载荷进行Monte-Carlo模拟,分析各类随机场变量、随机场的相关长度、对称性和边界条件对临界屈曲载荷分散性的影响。结果表明:不同随机场变量对层合板屈曲载荷分散系数影响的程度不同,纤维体积分数的影响最大,其次为纤维性能与基体性能;屈曲载荷的分散系数存在尺寸效应,随着板尺寸的增加,屈曲载荷分散系数逐渐减小;减小相关长度可有效地减小屈曲载荷的分散系数;纤维正对称铺设所引起的屈曲载荷分散系数稍大于反对称铺设情况,而两对边固支板的屈曲载荷分散系数一般大于四边简支板的结果。

引用

页码：194 / 200

页数：7

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