Effects of applied pressure and temperature during curing operation on the strength of tubular single-lap adhesive joints

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Adhesive joints have been widely used for fastening thin adherends because they can distribute the load over a larger area than the mechanical joint, require no holes, add very little weight to the structure and have superior fatigue resistance. However, the load capabilities of adhesive joints are affected by both applied pressure and temperature during cure, as well as by service environments because the adhesion characteristics of adhesives are very sensitive to manufacturing and environmental conditions. In this study, the tensile load capabilities of tubular single-lap adhesive joints with an epoxy adhesive were experimentally investigated with respect to service temperature and the applied pressure and temperature during curing operation. The effects of the applied pressure on the tensile load capabilities of tubular single-lap adhesive joints were studied by measuring the actual cure finish temperature using thermocouples and dielectrometry. From the experiments, it was found that the actual cure finish temperature of tubular single-lap adhesive joints increased as applied pressure increased, which increased residual thermal stress in the adhesive layer to decrease the load capabilities of adhesive joints. From finite element analysis and experimental results of tubular single-lap adhesive joints, the optimal geometry condition for adhesive joints was also investigated.
Publisher
VSP BV
Issue Date
2004
Language
English
Article Type
Article
Keywords

COMPOSITE-MATERIALS; DESIGN; CURE

Citation

JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, v.18, no.1, pp.87 - 107

ISSN
0169-4243
DOI
10.1163/156856104322747027
URI
http://hdl.handle.net/10203/84428
Appears in Collection
ME-Journal Papers(저널논문)
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