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An experimental and numerical study on the behaviors of adhesively-bonded steel double-hat section components under axial impact loading

R, S and Deb, A and Gupta, NK (2023) An experimental and numerical study on the behaviors of adhesively-bonded steel double-hat section components under axial impact loading. In: International Journal of Impact Engineering, 179 .

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Official URL: https://doi.org/10.1016/j.ijimpeng.2023.104629


A significant consideration in the deployment of adhesively-bonded joints in applications such as automotive body structures is their performance under impact loading. Due to the distinct behaviors of an epoxy-based structural adhesive under normal and shear loads combined with its propensity to undergo brittle fracture in cohesion and adhesion, special care needs to be taken in the constitutive modeling of such an adhesive as traditional Von Mises type yielding and elastoplastic material behavior do not seem to be applicable. In the current study, to start with, experimental load-displacement behaviors till failure of single lap shear and T-peel joints with steel substrates are predicted with the aid of a cohesive zone material model using LS-DYNA, an explicit nonlinear finite element analysis solver. With confidence established on cohesive zone modeling of the joints mentioned, the procedure is extended to robust prediction of the load-displacement responses and deformed shapes of steel double-hat section components subjected to axial impact loading. Three variants of steel hat section components have been considered from the viewpoint of joining of flanges with conventional discrete spot-welds, only continuous adhesive bonding, and a hybrid configuration with a combination of adhesive bonding and sparse spot-welds. The study reported here provides insights into mechanical behaviors of adhesively-bonded steel double-hat sections under impact loading, and demonstrates an efficient finite element modeling approach for adhesively-bonded steel hat sections using cohesive zone elements with fracture mechanics-based criteria for failure.

Item Type: Journal Article
Publication: International Journal of Impact Engineering
Publisher: Elsevier Ltd
Additional Information: The copyright for this article belongs to the Elsevier Ltd.
Keywords: Adhesively-bonded joints; Cohesive zone modeling; Explicit dynamic finite element analysis; Impact testing; Steel.double-hat sections
Department/Centre: Division of Mechanical Sciences > Centre for Product Design & Manufacturing
Date Deposited: 19 Jul 2023 09:48
Last Modified: 19 Jul 2023 09:48
URI: https://eprints.iisc.ac.in/id/eprint/82509

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