含面芯脱粘边缘闭合蜂窝壁板压缩稳定性研究  

Stability Research of Edge Closed Honeycomb Sandwich Panels with Face/Core Debond Under Compression

作　　者：潘松[1] 王新峰[1] 陈晓烽 PAN Song;WANG Xinfeng;CHEN Xiaofeng(State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing,210016,China)

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016

出　　处：《南京航空航天大学学报》2019年第1期35-40,共6页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：基于有限元软件ABAQUS,分别建立了无损伤和含板芯脱粘缺陷的边缘闭合蜂窝壁板的三维有限元模型。利用3种建模方法对比研究了边缘闭合蜂窝壁板在压缩载荷作用下的屈曲载荷规律和失稳模式。采用夹芯板理论将蜂窝芯等效为正交各向异性结构,板芯之间的胶层使用cohesive单元进行模拟。研究结果表明:随着脱粘尺寸的增加,蜂窝壁板的屈曲载荷呈现下降趋势;当30 mm≤D≤80 mm时结构由混合屈曲过渡到局部屈曲;两种等效模型发生局部屈曲后,无论是结构的屈曲载荷规律和屈曲载荷值还是失稳模式,均近似接近原始模型结果。Three-dimensional finite element models of edge closed honeycomb sandwich panels involving nondamage and face-core debonding damage are established by using finite element software ABAQUS. Three different models are employed to study the buckling loads and instability modes of the edge closed honeycomb panels under compressive loads. According to sandwich theory,the honeycomb core is equivalent to an orthotropic structure. The cohesive elements are used to simulate the interface between face are core. The results indicate that with the increase of debonding sizes,the buckling load of the honeycomb sandwich panel decreases gradually. When 30 mm ≤ D ≤ 80 mm,the instability modes transform from mixed buckling to local buckling. As the local buckling occurs,the law of buckling load,buckling load values and buckling modes in the two equivalent models become approximatively close to the original model.

关 键 词：边缘闭合蜂窝壁板 脱粘 稳定性 有限元分析 

分 类 号：TB332[一般工业技术—材料科学与工程]