The effect of surface condition, dwell time and plunge rate on the mechanical properties of dissimilar joints between polyethylene and aluminum were investigated. The scratches made by the mandrels on the aluminum surface acted as mechanical locks and hence the strength of the dissimilar joint was increased. An increased dwell time and a decreased plunge rate exhibited a positive effect on the bond strength values. The major joining mechanisms were mechanical interlocking between the sheets and wetting of the aluminum surface by the molten polyethylene. The increase in the actual contact area due to the increased surface roughness, improved the shear-tensile load of the joint (up to 56%).

研究了表面条件，保压时间和切入率对聚乙烯和铝异种接头力学性能的影响。芯轴在铝表面上产生的刮擦起机械锁的作用，因此异种接头的强度得到了提高。延长的停留时间和降低的切入速率对粘结强度值表现出积极的影响。主要的连接机制是薄板之间的机械互锁以及熔融聚乙烯对铝表面的润湿。由于增加的表面粗糙度，实际接触面积的增加改善了接头的剪切拉伸载荷（高达56％）。