Optimisation of the shear stress transfer in structural bonded assemblies using a curved bonded joint geometry

Structural adhesive bonding is coming into increasing use in civil engineering either for strengthening operations involving the adhesive bonding of external reinforcements or to replace traditional assembly techniques in new structures. However adhesive bonding induces stress concentrations at the...

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Bibliographic Details
Published inConstruction & building materials Vol. 25; no. 2; pp. 442 - 451
Main Authors Chataigner, Sylvain, Caron, Jean-Francois
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.02.2011
Elsevier B.V
Elsevier
Subjects
Adhesives
Analysis
Composite materials
Curved joint
Engineering Sciences
Epoxy adhesives
Epoxy resins
Finite element method
Hydrostatic pressure
Materials
Mechanical properties
Mechanics
Mechanics of materials
Optimization
Physics
Shear transfer
Structural bonding
Epoxy adhesives
Shear transfer
Curved joint
Structural bonding
Composite materials
Hydrostatic pressure
Optimization
COLLAGE
OPTIMISATION
EPOXYDE
STRUCTURE
MATERIAU COMPOSITE
CISAILLEMENT
JOINT
TRANSFERT
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Summary:Structural adhesive bonding is coming into increasing use in civil engineering either for strengthening operations involving the adhesive bonding of external reinforcements or to replace traditional assembly techniques in new structures. However adhesive bonding induces stress concentrations at the edges of the joint, which have been studied by a large number of researchers in order to reduce these phenomena and increase the capacity and service life of the assembly. These studies are all, therefore, concerned with optimizing shear stress transfer in adhesively bonded joints. This paper investigates the role of the hydrostatic pressure on the ultimate capacities of common civil engineering adhesives. This led us to investigate a new joint geometry, the “curved” bonded joint that naturally creates compressive stresses on the edge of the joint. Initially, classical modelling is conducted to determine how the geometry affects the stresses in the joint. Then, fracture mechanics is used to investigate crack propagation. After this theoretical modelling, several experimental investigations are presented. These are quasi-static tests which compare classical shear lap joints to curved joints. The experimental results are then exploited using the modelling described before. Additional testing is currently in progress, but the curved bonded joint seems to hold good prospects and a patent has been filed.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2010.03.005