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Continuum damage modelling of environmental degradation in joints bonded with EA9321 epoxy adhesive

Hua, Y, Crocombe, AD, Wahab, MA and Ashcroft, IA (2008) Continuum damage modelling of environmental degradation in joints bonded with EA9321 epoxy adhesive INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES, 28 (6). 302 - 313. ISSN 0143-7496

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Abstract

A mesh-independent continuum damage model has been proposed to predict the residual strength of adhesively bonded joints by introducing a displacement-based damage parameter into the constitutive equation of damaged materials. Joints bonded with a ductile adhesive EA9321 were studied for a range of environmental degradation. The moisture-dependent damage parameter for EA9321 was calibrated using an aged, mixed-mode flexure (MMF) test. The parameter was then used without further modification to model failure in aluminium and composite single-lap joints (SLJ) bonded with the same adhesive. The finite element analysis (FEA) package ABAQUS was used to implement the coupled mechanical-diffusion analyses required. The elastic–plastic response of the adhesive and the substrates, both obtained from the bulk tensile tests, were incorporated. A von Mises yield model was considered and both 2D and 3D modelling were undertaken and the results compared. The predicted joint residual strengths agreed well with the corresponding experimental data and the damage propagation pattern in the adhesive was also predicted correctly. The mesh independence of the model was demonstrated. This continuum damage model provides a means of predicting environmental degradation in ductile adhesive-bonded joints, where failure is predominantly within the adhesive layer.

Item Type: Article
Additional Information: NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Adhesion and Adhesives. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Adhesion and Adhesives, 28(6), September 2008, DOI 10.1016/j.ijadhadh.2007.08.005
Uncontrolled Keywords: Science & Technology, Technology, Engineering, Chemical, Materials Science, Multidisciplinary, Engineering, Materials Science, aluminium and alloys, finite element stress analysis, durability, progressive damage modelling, DUCTILE RUPTURE, VOID NUCLEATION, FRACTURE, BEHAVIOR, FAILURE, DEFORMATION, SIMULATION, ELEMENTS, STRAINS, GROWTH
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Divisions: Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Depositing User: Symplectic Elements
Date Deposited: 24 Sep 2012 19:37
Last Modified: 23 Sep 2013 19:38
URI: http://epubs.surrey.ac.uk/id/eprint/716732

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