Performance of bi-adhesive bonded aluminium lap joints

Pires, Inês; Quintino, L.; Durodola, J.F.; Beevers, A.

doi:10.1016/s0143-7496(03)00024-1

Cited by 166 publications

(47 citation statements)

References 5 publications

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“…The highest strength SLJ realized experimentally, at v c ¼ 0:2, is noted to be improved relative to both constant modulus cases across all the joint performance metrics: beyond the large strength increases, joint toughness and deflection at break are increased, while maintaining the joint stiffness of the (stiffest) constant modulus bondlayer assembly, i.e., across all relevant metrics, the v c ¼ 0:2 tailored joint is higher performing. Interestingly, several prior studies [44][45][46] demonstrated experimentally that a tailored joint can significantly outperform a constant modulus stiffer joint, but has only marginal merit compared to a (more) compliant joint. Our work shows significant improvements in both constant modulus cases with statistical significance.…”

Section: Resultsmentioning

confidence: 99%

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

et al. 2017

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Multilayered multi-material interfaces are encountered in an array of fields. Here, enhanced mechanical performance of such multi-material interfaces is demonstrated, focusing on strength and stiffness, by employing bondlayers with spatially-tuned elastic properties realized via 3D printing. Compliance of the bondlayer is varied along the bondlength with increased compliance at the ends to relieve stress concentrations. Experimental testing to failure of a tri-layered assembly in a single-lap joint configuration, including optical strain mapping, reveals that the stress and strain redistribution of the compliance-tailored bondlayer increases strength by 100% and toughness by 60%, compared to a constant modulus bondlayer, while maintaining the stiffness of the joint with the homogeneous stiff bondlayer. Analyses show that the stress concentrations for both peel and shear stress in the bondlayer have a global minimum when the compliant bond at the lap end comprises %10% of the bondlength, and further that increased multilayer performance also holds for long (relative to critical shear transfer length) bondlengths. Damage and failure resistance of multi-material interfaces can be improved substantially via the compliance-tailoring demonstrated here, with immediate relevance in additive manufacturing joining applications, and shows promise for generalized joining applications including adhesive bonding.

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Section: Resultsmentioning

confidence: 99%

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

et al. 2017

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“…Designers work continuously in order to increase the strength of bonded joints. One of the approach to increase the strength is decreasing of joint stiffness in the external area of overlap by changing the geometrical parameters [6][7][8][9]. An engineering tool which allows the stress analysis of adhesive joints is finite element method (FEM) [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Stress analysis of the single adhesive lap joints with plastic deformation of connected materials

2017

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In this work the results of numerical stress analysis of single adhesive lap joints were presented. In the analysis both the linear-elastic and the elastic-plastic models of adherends materials were considered. Plastic deformation of adherends has a significant influence on the stress state in the adhesive layer. In the first part of the work the mechanical properties of adherends material obtained in experimental investigations were presented. In next part of the study the numerical model of joint was presented. The results of static analysis using the finite element method showed that in the case of joining materials with low value of yield stress the plastic deformation occurs in adherend at load much smaller than destructive force of the joint. In this kind of joints the plastic deformation of adherend has an influence on rapid stress increase in adhesive layer, in final stage of loading. This phenomenon causes a decrease of load capacity of single adhesive lap joints of elasticplastic materials.

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“…Designers work continuously in order to increase the strength of adhesive joints. The approach to increase the strength of bonded joints is decreasing of joint stiffness in the external area of overlap by changing the geometrical parameters [6][7][8][9][10]. An engineering tool which allows the stress, strain and fatigue analysis of adhesive joints in engineering applications is finite element method (FEM) or boundary element method (BEM) [11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Influence of Plastic Deformation of Adherend Material on Stress Distribution in Adhesive Lap Joints

Witek

2017

Acta Metall Slovaca

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In the stress analysis of adhesive lap joints, the linear-elastic model of adherend material is often used. In some cases, when the joined material has a low yield stress, this assumption causes errors in the stress estimation in the adhesive layer or adherend. In this study, the results of numerical stress and strain analysis of adhesive lap joint were presented. In the performed analysis, both the elastic-plastic and linear-elastic models of joined materials were considered. In the first part of the study, the properties of adherend material were determined in experimental investigations. Next, the discrete model of joint was created. The results of nonlinear finite element analysis showed that for joints of materials with a low value of yield stress the plastic deformation begins in adherend at load 50% lower than destructive force of the joint. As a result of this phenomenon, the rapid stress increase in the adhesive layer is observed in an advanced phase of loading. This causes a significant decrease in strength in the lap joints of elastic-plastic materials.

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Performance of bi-adhesive bonded aluminium lap joints

Cited by 166 publications

References 5 publications

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

Stress analysis of the single adhesive lap joints with plastic deformation of connected materials

Influence of Plastic Deformation of Adherend Material on Stress Distribution in Adhesive Lap Joints

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