含任意分层缝纫正交层合板压缩屈曲分析  

ANALYSIS ON COMPRESSION BUCKLING OF STITCHED ORTHOTROPIC LAMINATES INCLUDING ARBITRARY DELAMINATION

作　　者：桂良进[1] 郦正能[1] 章怡宁[2] 杨旭[2] 

机构地区：[1]北京航空航天大学飞行器设计与应用力学系,北京100083 [2]航空工业总公司沈阳飞机设计研究所,沈阳110035

出　　处：《复合材料学报》2001年第2期97-101,共5页Acta Materiae Compositae Sinica

基　　金：航空科学基金! (0 0 B5 10 5 2 )

摘　　要：建立了分析含任意形状分层的缝纫增强复合材料层合板压缩屈曲问题的连续分析模型。该模型允许缝纫层合板含有一个或多个形状不同的分层。分析结果表明 ,缝纫针脚在分层区域的分布。A continuous model for determining the buckling strains of stitched laminates including arbitrary embedded delamination is developed. The analysis allows stitched laminates to have a multiple number of delamination of various shapes and sizes at any location. The method treats the discontinuous laminates as a body without delamination but with a force system added at a number of discrete points in the delaminated region so as to make the net interfacial traction to vanish at these points. Hence, the procedure solves problems of delaminated stitched laminates directly as a continuous system. Numerical results accounting for the effects of the location of stitches in the delamination region, the stitching density, and equivalent stiffness coefficient of stitching thread on buckling strains of stitched laminates are presented.

关 键 词：复合材料 缝韧 层合板 分层屈曲 压缩屈曲 连续分析模型 屈曲应变 

分 类 号：TB33[一般工业技术—材料科学与工程] O34[理学—固体力学]