期刊
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
卷 24, 期 11-12, 页码 1959-1976出版社
BRILL ACADEMIC PUBLISHERS
DOI: 10.1163/016942410X507687
关键词
Tubular butt joint; stress concentrations; robust design; shape optimization
Thin-walled tubular joints, bonded end to end, are commonly used specimens to measure the mechanical properties of thin adhesive layers subjected to uniform shear stress distributions. Unfortunately, the application of an axial loading to this geometry leads to strong stress concentrations at the edges of the adherend-adhesive interface. This drawback undermines the use of this test for characterizing adhesives under biaxial stress conditions. With the aim of removing these stress concentrations, this paper suggests the introduction of stress relieving grooves on the internal and external surfaces of the tubular adherends. The optimal shape of the groove is identified following the Taguchi robust optimization technique. Via finite element analyses, the stress concentrations at the edges of the adherend-adhesive interface are calculated. Many geometries are examined for different adherend and adhesive properties (noise factors) in order to identify the groove shape that minimizes the stress concentrations for all experimental conditions. The analysis shows that a shallow V-shaped groove close to the adherend-adhesive interface smoothes significantly the stress peaks due to axial loading. With this simple modification, a tubular butt joint becomes a universal specimen for applying any combinations of reasonably uniform shear and normal stresses to thin adhesive layers. (C) Koninklijke Brill NV, Leiden, 2010
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