摘要
为考查混合连接结构的力学性能,设计了两种不同形式的样件,通过试验研究了混合连接结构压缩与弯曲性能.结果发现:轴向压缩试验中点阵夹芯结构是连接结构的薄弱环节,芯材剪切引发的脱胶破坏与面板压皱都会引发结构失稳;面板分层是三点弯曲试验中连接结构的主要破坏模式,均发生在结构刚度突变位置,而支座反力的作用会导致点阵树脂基座的破裂,进一步引发脱胶破坏.
In order to study the mechanical property of hybrid joint to solve the problem of engineering design ,two kinds of specimens of hybrid joint were designed and their compressive and flexural prop‐erties were investigated through experiment .The experimental results show that in compressive test , lattice structure is the weakest part of the joint structure and debonding induced by core macro‐shear and face‐sheet w rinkling can result in buckling .Face‐sheet delamination is the main damage mode of joint structure in three‐point bending test and it occurs w here stiffness mutation of the structure ap‐pears ,but bearing reaction can bring about fracture of resin base of lattice core ,leading to debonding further .
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第2期123-127,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51309365)
关键词
复合材料
点阵-钢混合连接
碳纤维
压缩强度
弯曲性能
composite material
hybrid lattice-to-steel joint
carbon fiber
compressive strength
flex-ural property
