摘要
为了研究泡沫金属对压印-粘接复合接头力学性能的影响,对5052铝合金进行压印-粘接试验,分别使用泡沫铜和泡沫镍作为复合接头三明治结构的夹层,通过静力学拉伸-剪切试验,对压印-粘接复合接头的接头成形质量参数、接头强度、失效位移、失效模式和能量吸收能力进行研究。结果表明：泡沫金属可以减弱上板挤压下板的扩充力,使复合接头的镶嵌量减小;5052铝合金板材组合压印-粘接复合连接接头的抗拉强度由粘接剂和压印内锁结构共同提供;泡沫铜夹层可以改善压印-粘接复合接头的应力分布,提高其均匀性、稳定性;泡沫镍与胶层结合较好,复合接头的强度较高;泡沫金属对压印-粘接复合接头的能量吸收值有一定程度的影响,当夹层为泡沫镍时,能够大大提升复合接头的能量吸收能力。
To study the effect of foam metal on mechanical properties of clinch-bonded hybrid joint,the clinch-bonding test of 5052 aluminum alloy was carried out. Using copper foam or nickel foam as the interlayer of the sandwich structure of clinch-bonded hybrid joint respectively,the forming quality parameters,strength,failure displacement,failure mode and energy absorption of the hybrid joint with clinch-bonded were investigated by static tensile-shear test. The results show that the foam metal can weaken the extrusion expansion force of the upper sheet squeezing on the lower sheet and can reduce the clinch-bonded amount of hybrid joint. The tensile strength of clinchbonded hybrid joint of 5052 aluminum alloy sheet is provided by the adhesive and the interlocking structure of clinch together. Copper foam sandwich can improve the stress distribution of clinch-bonded hybrid joint and can improve the uniformity and stability of the joints.The combination of nickel foam and adhesive is very good and the strength of the clinch-bonded hybrid joint is higher. The foam metal has a certain influence on the energy absorption value of the clinch-bonded hybrid joint,when the sandwich is nickel foam,the energy absorption capacity of the hybrid joint can be improved greatly.
作者
初明明
何晓聪
雷蕾
赵得锁
张杰
CHU Ming-ming;HE Xiao-cong;LEI Lei;ZHAO De-suo;ZHANG Jie(Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, Chin)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2018年第3期242-247,共6页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51565023)
