接着接合した金属薄板の塑性曲げに及ぼす温度・速度の影響

抄録

This paper deals with the temperature-dependent elasto-viscoplasticity behaviour of a highly ductile acrylic adhesive and its effect on plastic bending of adhesively bonded sheet metals. Tensile lap shear tests of aluminium single-lap joints were performed at various temperature of 10-40°C at several tensile speeds. Based on the experimental results, a new constitutive model of temperature-dependent elasto-viscoplasticity of the adhesive is presented. From V-bending experiments and the corresponding numerical simulation, it was found that the gull-wing type geometrical imperfection of the V-bent sheet is suppressed by high-speed forming at a lower temperature.