Abstract
In this paper, an adhesively-bonded stepped-lap joint suffering from a void within its adhesive layer is investigated. The void separates the layer into two sections. The joint is under tensile load and materials are isotropic and assumed to behave as linear elastic. Classical elasticity theory is used to determine shear stress distribution in the separated sections of adhesive layer along the overlap length. A set of differential equations was derived and solved by using appropriate boundary conditions. Finite element solution was used as the second method to verify the obtained results by analytical method. A two-dimensional model was created in ANSYS and meshed by PLANE elements. A good agreement was observed between two methods of solutions. Results revealed that the stepped-lap joint performed better in stress distribution with a void rather than single-lap and double-lap joints.
Highlights
Adhesively-bonded joints are widely used due to their several advantages over the other common methods
Avoid in the adhesive layer separated the layer into two sections
Shear stress distribution of the adhesive layer was obtained for several voids with different locations or sizes
Summary
Adhesively-bonded joints are widely used due to their several advantages over the other common methods. Shishehsaz / Investigation on Void Effect on Shear Stress Field in Bonded Stepped-Lap Joint. The effects of void in scarf joint was investigated by Kan and Ratwani (1983) In the study, they assumed that the adhesive takes on only shear stress. Bavi (2011) in a void analysis for a single-lap joint assumed that the adhesive layer is under shear and tensile stress. Shear stress distribution in the adhesive layer of a specific design of a stepped-lap joint under tensile loading is investigated. Shishehsaz / Investigation on Void Effect on Shear Stress Field in Bonded Stepped-Lap Joint 333 layer. The differential equations for the tensile load in the upper adherend in a joint without a void is represented by Equation 1, Ghoddous and Shishesaz (2014). Shear stress distribution along the adhesive can be found by Equation 21-a for Section I and Equation 21-b for Section II
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