胶接与钎焊铝蜂窝板力学性能研究

Mechanical Properties of Glued and Brazed Aluminum Honeycomb Panel

蜂窝板是一种起源于天然蜂巢的仿生复合材料,其中,铝蜂窝板作为一种优异的轻质高强结构,广泛应用于轨道交通与航空航天领域,如舱壁、机翼与卫星整流罩等。铝蜂窝板由铝合金面板与蜂窝芯层复合而成,因此研究面板与芯层的高效连接工艺势在必行。胶接铝蜂窝板在使用过程中易产生空鼓、起包、胶接面失效等缺陷,且蜂窝板各项性能均受到了胶黏剂性能的限制。使用钎焊铝蜂窝板替代胶接铝蜂窝饭可以更好地发挥蜂窝结构的性能优势。本研究对比了相同尺寸规格下胶接与钎焊铝蜂窝板的平压、剪切和滚筒剥离性能及失效形式的差异,为不同工况条件下铝蜂窝板复合结构的连接工艺与失效研究提供了理论指导。

Honeycomb panel is a kind of bionic composite material originated from natural honeycomb nests. As an excellent light-weight and high-strength structure, aluminum honeycomb panel has been widely used in transportation and aerospace applications, such as bulkheads, wings and satellite fairings, etc. Aluminum honeycomb panels consist of aluminum alloy skins and honeycomb core, which are bonded together to form sandwich structures, and the efficient bonding technique has become key issue. The glued aluminum honeycomb panel is prone to failure of the glued surface during engineering operation, resulting in defects such as hollowing and bagging, and mechanical properties of the honeycomb panel are limited to the performance of the adhesive. Adopting brazed aluminum honeycomb panels instead of glued aluminum honeycomb is a way to better play the superiority of honeycomb structure. This study compared the mechanical properties of axial compression, shear and roller peeling as well as the failure modes of glued and brazed aluminum honeycomb panel specimens at the same size. This research can provide a theoretical guidance for the bonding technique and failure analysis of aluminum honeycomb composite structures under different working conditions.