摘要
整体屈曲是缝纫复合材料夹芯板的一种重要失效模式。考虑到缝纫夹芯复合材料板一般较厚且面板与芯层厚度相差较大,缝纫工艺对夹芯板刚度影响较大的特点,基于高阶剪切理论,编制了缝纫泡沫夹芯复合材料板稳定性分析的有限元程序。利用该程序对多个算例进行了计算,所得临界屈曲应力与文献及试验结果吻合很好。同时,讨论了不同边界条件下缝纫泡沫夹芯复合材料板稳定性随缝纫参数(包括针距、行距和缝纫针半径)以及结构参数(包括面板铺层角、芯层厚度和缝纫夹芯板边长)的变化规律。
The global buckling is one of the important failure modes of stitched foam-core composite sandwich plates.Considering the characters that the thicknesses of stitched foam-core composite sandwich are always relatively large and the thicknesses of face panel and core are obviously different,in addition that the stitching process influences the property evidently,the finite element program for stability analysis of stitched foam-core composite sandwich plates was written based on higher-order shear deformation theory.The calculation results revealed the consistency with the results in references and experiments.The relationship between the stability of stitched foam-core composite sandwich plates and stitching parameters（including step,space and radius of needle） and structural parameters（including stacking angles in face panel,thickness of the core and length of the sandwich） was discussed.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2011年第2期201-205,共5页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(10932001
11072015)
关键词
缝纫
复合材料
泡沫夹芯板
屈曲
高阶剪切
stitched
composite
foam-core sandwich
buckling
higher-order shear
