Comparison of different adhesively-bonded joint types for mechanical structures

Adhesively-bonded joints are widely used to join structural components. The most common joint types are single-lap joints (SLJ), double-lap joints (DLJ), stepped-lap joints and scarf joints. Several factors influence the behaviour and strength of an adhesive joint, namely the type of adhesive (britt...

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Bibliographic Details
Published in:	Applied adhesion science Vol. 6; no. 1; p. 1
Main Authors:	Barbosa, N. G. C., Campilho, R. D. S. G., Silva, F. J. G., Moreira, R. D. F.
Format:	Journal Article
Language:	English
Published:	Cham Springer International Publishing 24-12-2018 Springer Nature B.V
Subjects:	Adhesion tests Adhesive bonding Adhesive joints Adhesive strength Adhesives Advances in Structural Adhesive Bonding Aircraft accidents & safety Biomaterials Bonded joints Chemistry and Materials Science Comparative studies Computer simulation Ductile-brittle transition Finite element method Joint geometry Lap joints Materials Science Mathematical models Mechanical Engineering Scarf joints Stepped lap joints Stress analysis Surfaces and Interfaces Thin Films Fracture mechanics Finite element analysis Cohesive zone models Epoxy Polyurethane
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Summary:	Adhesively-bonded joints are widely used to join structural components. The most common joint types are single-lap joints (SLJ), double-lap joints (DLJ), stepped-lap joints and scarf joints. Several factors influence the behaviour and strength of an adhesive joint, namely the type of adhesive (brittle or ductile, strong or weak) and joint geometry. One of the most important parameters that affects the joint strength is the overlap length ( L O ). A comparative study that involves several joint geometries and uses adhesives with different characteristics was carried out to check which type of adhesive is most suitable for a particular joint geometry. For this purpose, SLJ, DLJ, stepped-lap joints and scarf joints were chosen for testing with three adhesives. The experimental results were compared with numerical results obtained from Abaqus ® using an integrated cohesive zone modelling module. Initially, a stress analysis was carried out to compare the different joint geometries. With this work, it was concluded that the optimal joint type significantly depends on the type of adhesive used, such that less strong and ductile adhesives are more suitable for joint geometries that exhibit large stress variations, while stronger but more brittle adhesives are recommended for joint geometries with more uniform stresses.
ISSN:	2196-4351 2196-4351
DOI:	10.1186/s40563-018-0116-1