Advanced analysis and testing of adhesive joints

SCI is currently engaged in a programme of finite element modelling and physical testing to improve its understanding of the behaviour of adhesive joints between steel and other materials.  The focus of the current project is the glass-adhesive-steel interface in a type of glazing support system, but the methods developed during this project will be applicable to other materials and building elements.  The project is part of a wider investigation into steel-glass interfaces and steel-glass composite structures.  It is funded by the European Commission through its RFCS programme and Corus Tubes.

At the heart of the SCI research is the detailed investigation of the localised behaviour of the adhesive joint.   To overcome the many complexities inherent in multi-material composite systems, the first step has been to consider a simple plane interface between a single pane of toughened glass and a steel angle.   Test specimens using three different types of adhesive have been prepared by Cambridge University and are currently being tested in their laboratories.  Two types of small scale test are being undertaken to determine the behaviour of the joint under shear and peeling action.  The figure below shows the ‘small scale’ test specimen undergoing an in-plane shear test.

In parallel with the physical tests, finite element models of the test specimens have been prepared by SCI.  Results from the finite element analysis are being compared with the results from the physical tests to allow calibration of the models.  The lessons learned from the current phase of analysis will then be applied to the modelling of full-scale glazing support systems.  The figure below shows the finite element predictions of the behaviour of the ‘peeling’ test specimen (two steel angles with a strip of glass sandwiched in between).

The project is to conclude with the formulation of a ‘simple’ analytical model that will enable any glazed façade with continuous adhesive based connections to be modelled without the need to undertake physical tests or additional finite element techniques.

For further information, please contact:

Ed Yandzio
Principal Engineer
Email:e.yandzio@steel-sci.com
Tel: +44 (0) 1344 636539