A Celebration of the Work of Professor Tony Kelly ScD FRS FREng PhD CBE DL
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A Celebration of the Work of Professor Tony Kelly ScD FRS FREng PhD CBE DL P. W. R Beaumont & Costas Soutis & Alma Hodzic Received: 23 August 2013 / Accepted: 8 September 2013 # Springer Science+Business Media Dordrecht 2013
Emeritus Professor & Distinguished Research Fellow at Cambridge University, Extraordinary Fellow of Churchill College, Cambridge & Vice-Chancellor of the University of Surrey (retired) Fellow of the Royal Society, Fellow of the Royal Academy of Engineering, Foreign Associate of the US National Academy of Engineering, Fellow of the Institute of Physics, Fellow of the Institution of Materials Mining & Metallurgy (past President)
1 A collection of invited papers to mark his 85th birthday year In the “swinging sixties”, a fashionable professor at Cambridge, Alan Cottrell, often gave invited lectures at The Royal Society. On such an occasion, it was usual of him to ask his young
P. W. R. Beaumont (*) University Of Cambridge, Cambridge, UK e-mail: [email protected] C. Soutis University of Manchester, Manchester, England A. Hodzic University of Sheffield, Sheffield, England
Appl Compos Mater
lecturer Tony Kelly, also in the Metallurgy Department, to consider the script before presenting it. In a discourse delivered to the Royal Society on 15th June 1960, Alan enunciated the principle of fibre reinforcement: “No, the practical approach is to admit the existence of cracks and notches and to try to render them innocuous. If there is a transverse notch cutting across a parallel array of fibres in a rod of some material like adhesive, the forces from the cut fibres can be transmitted to the intact fibres close to the notch tip only by passing as shearing forces through layers of the adhesive”. He continued: “If this adhesive has a fairly low resistance to shear … it will then be incapable of focussing the transmitted forces sharply…There is a tremendous opportunity for developing this principle further using fibres of very strong atomic forces like oxides and carbides”. This was “music” to Tony’s ear. With his interest and knowledge of ceramics, he recognised immediately that the oxides and the carbides would make ideal reinforcements. Tony and his earliest research students were perfectly placed in that they were already elucidating the principles of the strengthening of metals and yet were lucky enough to spot the advantages of non-metallic solids as the major strengthening agent. Tony began by asking his first research assistant, Bill Tyson from Canada, to validate or otherwise Alan’s idea by using a metallic matrix as the adhesive. From this work, Tony and Bill produced what could be called the colligative mechanical properties of an aligned fibre-reinforced system; the contribution each phase makes to overall strength; how it depended on volume fraction; and importantly upon the ratio of length to diameter of the fibre. Furthermore, they found a new means of dissipating energy…fibre pull-out. But there was one more discovery still to make with Tony’s second research graduate, George Cooper, whi
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