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SEAM Seminar Series Talk 2: ‘Sticking Up for Glue!’

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SEAM Seminar Series ‘Trustworthiness, Reliability & Materials Science for Aircraft Structures’. Talk 2: ‘Sticking Up for Glue!’

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Talk 2: ‘Sticking Up for Glue!’

by Professor A.J. Kinloch, FREng FRS (Imperial College London, UK)

This is the second talk, part of the 2021 SEAM Seminar Series entitled ‘Trustworthiness, Reliability & Materials Science for Aircraft Structures’. The series aims to lead the conversation from a significant industry perspective on the topic of knowledge gap and necessary Research & Development.

Chaired by: Professor Rhys Jones (SEAM Senior Affiliate Investigator; Swinburne University Adjunct Professor; and Monash University Emeritus Professor).

Abstract

Structural adhesives are being increasingly used in a very wide range of engineering applications, especially in the aerospace and automotive industries. In this talk Professor Kinloch will illustrate the wide and varied use of modern engineering adhesives and then consider three crucial aspects of their use, all of which have a strong materials science input. Firstly, the adhesive must establish intimate interfacial molecular contact with the substrate. Then, ‘intrinsic adhesion’ forces need to be established between the adhesive and the substrates, and these ‘intrinsic adhesion’ forces will be required to hold the materials together throughout the service-life of the joint. To achieve a strong and durable interface some form of surface modification is frequently required. 

Secondly, the mechanical properties of the adhesive layer play a major role in the ‘measured adhesion’ that is attained from a bonded joint. Indeed, many adhesives are formulated so that they possess a multiphase microstructure in order to increase the toughness of the layer, but without sacrificing other important properties. Thus, the toughness of the adhesive is also an important consideration. Thirdly, it must be appreciated that the mechanical performance and life expectancy of the adhesive joint will be affected by (i) the detailed design of the joint, (ii) the way in which loads are applied to the interphase, and (iii) the service environment that it must withstand. The importance and usefulness of adopting a fracture-mechanics approach to the failure of adhesive joints is apparent throughout all these different aspects. Further, the techniques of fracture mechanics are often usefully coupled with advanced surface analytical methods such as X-ray photoelectron spectroscopy and secondary-ion mass spectroscopy.

Professor Kinloch will illustrate examples of the above aspects drawn from the bonding of thermoplastic fibre-composites, increasing the toughness by formulating rubber-modified and nano-modified thermosetting polymers and predicting the service-life of structural adhesive joints under cyclic-fatigue loading.

Professor Tony Kinloch, FREng FRS holds a personal chair as ‘Professor of Adhesion’ in the Department of Mechanical Engineering at Imperial College London. He has been awarded the ‘Armourer’s and Braziers Prize for Materials Science’ from The Royal Society, the ‘Le Prix Dédale de la Sociéte Française d’Adhesion’ from the French Adhesion Society, the ‘Hawksley Gold Medal’ of the Institution of Mechanical Engineers, ‘The Griffith Medal’ from the Institute of Materials and the US Adhesion Society 3M Award for ‘Outstanding Excellence in Adhesion Research’. He is a Visiting Professor at the University of Sydney and UNSW. In 2016 he was elected a ‘Fellow of the European Structural Integrity Society’ and in 2017 a ‘Fellow of the International Congress of Fracture’. In 1997 he was elected a Fellow of the Royal Academy of Engineering (FREng) and in 2007 was elected a Fellow of The Royal Society (FRS). 


		SEAM Seminar Series Talk 2: ‘Sticking Up for Glue!’ image

		SEAM Seminar Series Talk 2: ‘Sticking Up for Glue!’ image

		SEAM Seminar Series Talk 2: ‘Sticking Up for Glue!’ image
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