开口复合材料柱壳屈曲与补救有限元分析

被引:9
作者
李钟海
程小全
张纪奎
机构
[1] 北京航空航天大学航空科学与工程学院
关键词
复合材料开口柱壳; 压缩屈曲; 穿透裂纹; 补救; 有限元法;
D O I
暂无
中图分类号
TB33 [复合材料];
学科分类号
0805 ; 080502 ;
摘要
用有限元法对含有轴向裂纹的开口加强复合材料柱壳结构进行了补救研究;分析其压缩屈曲强度与模态情况,得到了裂纹长度与屈曲强度的关系,并与无裂纹的结构进行了对比。结果表明:裂纹长度在200mm以下时,对整个结构承载能力影响很小;当裂纹长度继续增大时,屈曲区域从开口上方转移到裂纹附近,屈曲强度开始急剧下降。为了加强裂纹所在区域结构的承剪能力,进行适当的修补后,可使屈曲模态与无裂纹柱壳相同,且屈曲强度稍有增加,从而证明了所提出补救方法的有效性。
引用
收藏
页码:172 / 176+216 +216
页数:6
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