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Open AccessArticle

Interfacial Stress Analysis of Adhesively Bonded Lap Joint

Department of Mechanical Engineering, Yuan Ze University, Taoyuan City 320, Taiwan
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Materials 2019, 12(15), 2403; https://doi.org/10.3390/ma12152403
Received: 13 June 2019 / Revised: 11 July 2019 / Accepted: 25 July 2019 / Published: 28 July 2019
(This article belongs to the Special Issue Advanced Characterization of Adhesive Joints and Adhesives)
The use of adhesively bonded joints in place of traditional joining techniques such as bolted or rivet joints is becoming greatly popular in recent years. Interfacial stress in the adhesive is critical to the strength of adhesively bonded joints. It is necessary to predict the interfacial stresses accurately to ensure the safety of joints. In this work, an analytical model is explicitly presented to evaluate the stresses in a double lap joint. The equilibrium equations in the adhesive overlap region are derived on the basis of elasticity theory. The governing equations are presented in terms of shear and peel stresses in the adhesive. Analytical solutions are derived for the shear and peel stresses, which are considered to be the main reason for the failure of the double lap joint. To verify the analytical solutions, the finite element method is conducted using the commercial package ANSYS. Results from the analytical solution agree well with finite element results and numerical investigations available in the literature. The effect of the adhesive thickness, shear modulus, adherend Young’s modulus and bonding length on the shear and peel stresses in the adhesive of the double lap joint are studied. Numerical results demonstrate that both the maximum shear and peel stress occur at both ends of the bonding region. The maximum values of the shear and peel stresses increase as the adhesive thickness decreases and as the adhesive shear modulus increases provided that the adhesive thickness is sufficiently small. The simplicity and capability to obtain analytical expressions of the shear and peel stresses for double lap adhesive bonded joints makes the proposed analytical model applicable for the stress analysis and preliminary structural design. View Full-Text
Keywords: double lap joint; elasticity theory; shear stress; peel stress double lap joint; elasticity theory; shear stress; peel stress
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MDPI and ACS Style

Her, S.-C.; Chan, C.-F. Interfacial Stress Analysis of Adhesively Bonded Lap Joint. Materials 2019, 12, 2403. https://doi.org/10.3390/ma12152403

AMA Style

Her S-C, Chan C-F. Interfacial Stress Analysis of Adhesively Bonded Lap Joint. Materials. 2019; 12(15):2403. https://doi.org/10.3390/ma12152403

Chicago/Turabian Style

Her, Shiuh-Chuan; Chan, Cheng-Feng. 2019. "Interfacial Stress Analysis of Adhesively Bonded Lap Joint" Materials 12, no. 15: 2403. https://doi.org/10.3390/ma12152403

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