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Effect of Adherend Recessing on the Tensile Strength of Single Lap Joints
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Orientador(es)
Resumo(s)
Bonded joints are gaining importance in many fields of
manufacturing owing to a significant number of advantages to
the traditional methods. The single lap joint (SLJ) is the most commonly
used method. The use of material or geometric changes in
SLJ reduces peel and shear peak stresses at the damage initiation
sites. In this work, the effect of adherend recessing at the overlap
edges on the tensile strength of SLJ, bonded with a brittle adhesive,
was experimentally and numerically studied. The recess dimensions
(length and depth) were optimized for different values of
overlap length (LO), thus allowing the maximization of the joint’s
strength by the reduction of peak stresses at the overlap edges.
The effect of recessing was also investigated by a finite element
(FE) analysis and cohesive zone modelling (CZM), which allowed
characterizing the entire fracture process and provided joint
strength predictions. For this purpose, a static FE analysis was performed
in ABAQUS1 considering geometric nonlinearities. In the
end, the experimental and FE results revealed the accuracy of
the FE analysis in predicting the strength and also provided
some design principles for the strength improvement of SLJ using
a relatively simple and straightforward technique.
Descrição
Palavras-chave
Aluminium and alloys Epoxy=Epoxides Finite element analysis Fracture mechanics Joint design
Contexto Educativo
Citação
Editora
Taylor & Francis