A novel theoretical and numerical model to predict stiffness of double lap bonded joints under dynamic loading

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Abstract

In the present research, the modulus of a double lap bonded joint in the strain rate ranges of 0 to 1055 S-1 is predicted by a theoretical model. In this approach, using geometrical parameters of bonded joint, elastic young modulus of adherends and shear modulus of the adhesive layer at two different strain rates, strain rate sharing of bonded joint’ constituents can be calculated. Also, using these data, shear modulus of the adhesive layer at its share of strain rate is calculated; Then, using these data, dynamic modulus of double lap bonded joint can be computed. Calculating stiffness of the double lap bonded joint using geometrical parameters of bonded joint and mechanical parameters of constituents without need to do the test is the advantage of this model. Also, in this manuscript, a finite element model (using Abaqus Explicit) is presented in order to predict dynamic modulus of double lap bonded joint using elastic mechanical properties of bonded joint constituents, their densities and bonded joint geometrical parameters. The two presented models show a similar trend in the prediction of double lap bonded joint’ modulus; in a way that, at the two models, bonded joint’ modulus is increased by increasing strain rate. The maximum difference between the two models is about nine percent.

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References

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Journal of Solid and Fluid Mechanics
Volume 10, Issue 3
October 2020
Pages 135-145

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