Fatigue damage modelling of adhesively bonded joints under variable amplitude loading using a cohesive zone model |
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| Authors: | H. Khoramishad A.D. Crocombe K.B. Katnam I.A. Ashcroft |
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| Affiliation: | aDepartment of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran 16846, Iran;bMechanical, Medical and Aerospace Engineering, Faculty of Engineering and Physical Sciences (J5), University of Surrey, Guildford, Surrey GU2 7XH, UK;cWolfson School of Mechanical and Manufacturing Engineering, Loughborough University, Leicestershire LE11 3TU, UK |
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| Abstract: | ![]()
In this paper, the fatigue response of adhesively bonded joints under variable amplitude (VA) cyclic loading was predicted using a numerical model. The adhesive layer was modelled using the cohesive zone model with a bi-linear traction-separation response. A damage model, incorporating fatigue load ratio effects, was utilised in conjunction with the cohesive zone model to simulate the detrimental influence of VA fatigue loading. This model was validated against published experimental results obtained from fatigue tests of adhesively bonded single lap joints subjected to various types of VA fatigue loading spectra. This model successfully predicted the damaging effect of VA fatigue loading on the adhesively bonded joints and was generally found to be a significant improvement on the other damage models considered. |
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| Keywords: | Variable amplitude fatigue Adhesively bonded joints Cohesive zone model Fatigue damage modelling Process zone |
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