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1769763 
Journal Article 
Strength Improvement of Adhesively-Bonded Joints Using a Reverse-Bent Geometry 
Campilho, RDSG; Pinto, AMG; Banea, MD; Silva, RF; da Silva, LFM 
2011 
Yes 
Journal of Adhesion Science and Technology
ISSN: 0169-4243
EISSN: 1568-5616 
25 
18 
2351-2368 
WOS:000296715100003 
Adhesive bonding of components has become more efficient in recent years due to the developments in adhesive technology, which has resulted in higher peel and shear strengths, and also in allowable ductility up to failure. As a result, fastening and riveting methods are being progressively replaced by adhesive bonding, allowing a big step towards stronger and lighter unions. However, single-lap bonded joints still generate substantial peel and shear stress concentrations at the overlap edges that can be harmful to the structure, especially when using brittle adhesives that do not allow plasticization in these regions. In this work, a numerical and experimental study is performed to evaluate the feasibility of bending the adherends at the ends of the overlap for the strength improvement of single-lap aluminium joints bonded with a brittle and a ductile adhesive. Different combinations of joint eccentricity were tested, including absence of eccentricity, allowing the optimization of the joint. A Finite Element stress and failure analysis in ABAQUS (R) was also carried out to provide a better understanding of the bent configuration. Results showed a major advantage of using the proposed modification for the brittle adhesive, but the joints with the ductile adhesive were not much affected by the bending technique. (C) Koninklijke Brill NV, Leiden, 2011 
Bonded joint; structural adhesive; finite element analysis; strength prediction