泡沫金属三明治结构压印-粘接复合接头剥离性能分析

为研究三明治结构压印-粘接复合接头的抗剥离性能,选取AA5052铝合金板以及泡沫镍、泡沫铜以及泡沫铁镍进行压印-粘接复合连接,对接头进行拉伸剪切试验,采用扫描电镜对失效断口进行了观察,分析了接头的失效形式、失效载荷、能量吸收值以及失效机理。结果表明:夹层的存在会使接头中胶层的失效过程更加稳定,夹层对于压印-粘接复合接头的承载能力并无显著影响,但是会降低其失效过程中的能量吸收值。

Analysis of the peeling properties of sandwich structure clinch-bonded hybrid joints with metal foam as interlayer

Foamed metal is a new functional material which has excellent performance like permeability, soundproofing, shock absorption, and inoxidizability,so it has a wide range of applications in the field of industrial manufacturing. In order to study the anti-peeling properties of sandwich structure clinch-bonded hybrid joint, AA5052 aluminium alloy sheet, foam nickel, foam copper, and foam iron-nickel were used for clinch-bonded hybrid joints. Then tensile shear test was carried out on the fracture. The fracture surface was observed by scanning electron microscope. The failure mode, failure load, energy absorption values, and the failure mechanism were studied. The result showed that the existence of the interlayer would make the failure process of the adhesive more stable. The interlayer had no significant effect on the failure load of the joints but it would reduce the energy absorption of the joints.