Failure analysis of bonded T-peel joints: Efficient modelling by standard finite elements with experimental validation

• Published in: International journal of adhesion and adhesives Vol. 30; no. 5; pp. 306 - 312
• Main Authors: Castagnetti, D., Dragoni, E., Spaggiari, A.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier Ltd 01.07.2010; Elsevier
• Subjects: Accuracy; Adhesive joints; Adhesives; Application fields; Applied sciences; Criteria; Exact sciences and technology; Experimental tests; Failure; Failure analysis; Finite elements; Mathematical analysis; Mathematical models; Polymer industry, paints, wood; T-peel; Technology of polymers; T-peel; Finite elements; Adhesive joints; Experimental tests; Failure analysis; Experimental test; Mechanical model; Epoxy resin; Theoretical study; Mechanical properties; Aluminium alloy; Fracture criterion; Modeling; T joint; Finite element method; Adhesive joint; Elastic properties; Adhesive
• ISSN: 0143-7496; 1879-0127
• DOI: 10.1016/j.ijadhadh.2009.10.004

The paper describes an efficient procedure, based on standard finite element techniques, for the failure analysis of bonded structures. Modelled with structural elements, the adherends are attached by means of standard kinematic constraints to a single layer of solid elements reproducing the adhesive. The work assesses the accuracy of the proposed method in the prediction of the post-elastic response of adhesive joints by applying a singularity-free stress failure criterion. Benchmarks for the model are the load–deflection curves obtained by an ad-hoc experimental campaign on steel and aluminium T-peel joints. The accuracy of the model appears very good with respect to the experimental results, both in terms of maximum force and post-elastic behaviour. The failure criterion adopted appears well-founded and the CPU time needed for the analysis is minimum thus corroborating this efficient procedure for the analysis of very complex structures.