Torsional Test Method for Adhesive Joints

Abstract

A modified tubular butt assembly for testing adhesive joints was found to yield greater precision and sensitivity than previous methods. Effects due to modifying the surface pretreatment of aluminurn-epoxy joints could be identified and analyzed statistically by the Wilcoxon-Mann-Whitney test. The use of a very short tube integrally mounted on a solid rod minimizes axial stress components. The joints are easily handled and tested, and due to their greater reproducibility, fewer tests are necessary.