Bucking Delaminating of Composite Sandwich Plates under Hygrothermal Conditions
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摘要: 根据含面芯分层损伤的均衡复合材料夹层板在面内载荷作用下的变形特点,建立了一个基于分析椭圆分层局部屈曲变形的二维模型,考虑了分层边界附近未脱胶芯子对分层子板的影响,利用复合材料层板湿热本构关系式和瑞利-里兹法对面芯分层的屈曲进行具体的研究,分析了不同材料面板,不同铺层以及各种湿热情况对临界屈曲载荷的影响.结果表明,湿热情况便夹层结构刚度和强度下降.Abstract: To analyze the buckling of elliptical face-core delaminating in composite sandwich plates, a two-dimensional elastic foundation model was established. A displacement function was considered to describe the buckling shapes. By taking the effects of hygrothermal conditions, of the core and of the composite adjacent to delaminating location into account, Reyleigh-Ritz energy method was used to predict the critical buckling load, as a function of composite material, laying angle and hygrothermal condition.
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[1] Chai H, Babcock C D, Knayss W G. One dimensional modelling of failure laminated plates by delamination buckling[J].Solids and Structure, 1981,17(11):1069~1083. [2]Vizzini A J, Lagace P A. The buckling of a delaminating sublaminate on an elastic foundation[J]．Composite Materials, 1987,21(12):1106~1117. [3]张志民.复合材料结构力学[M]．北京:北京航空航天大学出版社,1993. [4]徐永锋.含分层损伤复合材料夹层板的压缩剩余强度研究 ．北京:北京航空航天大学飞行器设计与应用力学系,1996. -
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