Dynamic Deformation of Tapered Lap Adhesive Joint under Impact Loading.

Propagation of stress wave and concentration of dynamic stress in tapered lap adhesive joints under impact loading were investigated analytically and experimentally. Stress distribution and time variation of stress and strain in the joints under tensile impact loading were calculated using F.E.M. considering viscoelastic properties of adhesive resin. Impact tests on the adhesive joints of aluminum alloy were conducted. Calculated results agreed with experimental results. Effects of taper length on the concentration of stress and strain were examined by comparing the calculated results with the experimental results. An increase in taper length is effective to reduce the concentrations of stress and strain in adhesive lap joints under impact loading.