Broughton, W R; Crocker, L E; Urquhart, J M (2001) Strength of adhesive joints: a parametric study. NPL Report. MATC(A)27

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Abstract

A parametric study has been carried out to assess the reliability of different failure criteria being used by engineers/designers to predict the static strength of adhesively bonded structures. A series of simulated experiments using finite element analysis (FEA) have been conducted on single-lap and scarf joint configurations for this purpose. The FEA was used to establish the effects of specimen geometry and different elastic-plastic material models in stress and strain distributions within the adhesive layer, and the joint strength. Von Mises and linear Drucker-Prager materials models were used to characterise deformation behaviour of the adhesive. Algebraic formulations relating geometric parameters to joint strength were derived using statistical analysis (Design of Experiments). Experimental results were used to validate the analysis procedure.
The results from the parametric study demonstrate that joint strength for the two geometries can be determined, to a reasonable degree of accuracy, using two-dimensional finite element modelling approach in conjunction with suitable failure criteria, provided that plasticity of the adhesive and adherends is taken into account. The study also revealed that the stress and strain distributions, and hence failure, for the two joint configurations are sensitive to changes in adhesive layer thickness, adherend thickness, bond length and taper angle (scarf joint only).

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	MATC(A)27
Subjects:	Advanced Materials Advanced Materials > Adhesives
Last Modified:	02 Feb 2018 13:17
URI:	http://eprintspublications.npl.co.uk/id/eprint/2032

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