Dr Harry Coules

Summary

My research focusses on the effects of residual stresses in engineering materials and structures. Many common manufacturing processes including welding, forging and most additive manufacturing techniques leave behind large residual stresses in materials which can accelerate damage. As a result, it is important to take the effects of residual stress into account when assessing the integrity of high-reliability structures like nuclear reactor pressure circuits and airframe components. In the past, I have worked on methods for reducing the stresses introduced by welding and on methods of residual stress measurement and reconstruction. Since 2015, I have held a research fellowship funded by the Engineering and Physical Sciences Research Council. This fellowship focusses on how residual stresses interact with failure mechanisms including fracture and high-temperature creep.

Biography

I received an MEng in Engineering Science from the University of Oxford in 2009 before joining the Welding group at Cranfield University for my PhD, which was on reduction of residual stress in welds by localised rolling. In 2013, I joined the Solid Mechanics group at Bristol to work on fracture mechanics and stress field reconstruction methods. Currently I hold an EPSRC fellowship on advanced structural analysis for nuclear applications. This allows me to do research work in several areas including fracture, high-temperature creep, residual stress, and manufacturing processes.

Keywords

• Residual stress
• Fracture mechanics
• Structural integrity
• Welding
• Stress analysis
• Neutron diffraction

Memberships

Organisations

Department of Mechanical Engineering

Other sites

• Engineering

Links

•   Google Scholar profile
• EPSRC fellowship page
• ORCID profile
• ResearchGate profile

Recent publications

• Coules, H, Horne, G, Peel, M & Connolley, T, 2019, ‘Localised prior strain-hardening increases the tearing resistance of a ductile steel’. International Journal of Mechanical Sciences, vol 150., pp. 103-111
• Benghalia, G, Rahimi, S, Wood, J, Coules, H & Paddea, S, 2018, ‘Multiscale measurements of residual stress in a low-alloy carbon steel weld clad with IN625 superalloy’. Materials Performance and Characterization, vol 7.
• Coules, H & Smith, D, 2018, ‘Measurement of the residual stresses in a PWR Control Rod Drive Mechanism nozzle’. Nuclear Engineering and Design, vol 333., pp. 16-24
• Coules, HE, Horne, GC, Venkata, KA & Pirling, T, 2018, ‘The effects of residual stress on elastic-plastic fracture propagation and stability’. Materials and Design, vol 143., pp. 131-140
• Coules, HE, 2018, ‘On predicting the interaction of crack-like defects in ductile fracture’. International Journal of Pressure Vessels and Piping, vol 162., pp. 98-101
• Wang, YQ, Coules, HE, Truman, CE & Smith, DJ, 2018, ‘Effect of elastic follow-up and ageing on the creep of an austenitic stainless steel’. International Journal of Solids and Structures, vol 135., pp. 219-232
• Venkata, KA, Truman, C, Coules, H, Dey, S & Pirling, T, 2017, ‘Assessment of the effect of residual stresses in elastic-plastic fracture of dissimilar welded components’. Materials at High Temperatures.
• Coules, H, 2017, ‘Interaction of surface cracks subjected to non-uniform distributions of stress’. International Journal of Pressure Vessels and Piping, vol 157., pp. 20-29
• Coules, H, Horne, G, Kabra, S, Colegrove, P & Smith, D, 2017, ‘Three-dimensional mapping of the residual stress field in a locally rolled aluminium alloy specimen’. Journal of Manufacturing Processes, vol 26., pp. 240-251
• Cozzolino, LD, Coules, H, Colegrove, P & Wen, S, 2017, ‘Investigation of post-weld rolling methods to reduce residual stress and distortion’. Journal of Materials Processing Technology, vol 247., pp. 243-256

View complete publications list in the University of Bristol publications system