A Two-Dimensional Stress Analysis of Adhesive Butt Joints Filled With Elastic Circular Fillers in the Adhesive Subjected to Static Tensile Loadings

摘要

This paper deals with a two-dimensional stress analysis of adhesive butt joints with elastic circular fillers in the adhesive subjected to external tensile loadings. Similar adherends and an adhesive including elastic circular fillers were replaced with finite strips in the analyses. Stress distributions in the adhesive butt joints were analyzed exactly using a two-dimensional theory of elasticity. The effects of stiffness, location of filler particles and number of filler particles on the interface stress distributions and the periphery of the filler particles were clarified in the numerical calculations. It was seen that as the amount of filler particles increased, the stiffness of filler increased and the location of filler approached the edges of interfaces, strengths of the joints under static tensile loadings were estimated to increase. For verification of the analyses, experiments were carried out to measure the strains in the joints under the static tensile loadings and bending moments. The analytical results were in fairly good agreement with the experimental results. In addition, the analytical results were also compared with those obtained from 2-D and 3-D FEM calculations. Rupture tests were conducted, and joint strengths were shown to be improved by adding the elastic fillers.