Residual Stress 2017: Techniques and Solutions for Industry Applications

Anas Yaghi: Senior Research Engineer, Manufacturing Technology Centre

Anas Yaghi obtained his PhD in Mechanical Engineering from the University of Nottingham in 1993. He then worked as a research fellow at the same university until 2012, when he decided to join the Manufacturing Technology Centre (MTC) as a Senior Research Engineer in Physics Modelling. The MTC is one of seven High-Value Manufacturing Catapult Centres in the UK. His experience in stress analysis and the finite element method spans almost 30 years. He is a specialist in the simulation of thermo-mechanical processes such as fusion welding and additive manufacture.

Matthew Roy: Lecturer in Materials for Demanding Environments, University of Manchester

Dr. Matthew Roy CEng MIMechE attained undergraduate and Masters degrees focussed on Mechanical and Materials Engineering from Western University, followed by a PhD in Materials Engineering from the University of British Columbia in Canada. In 2014, he assumed the post of Lecturer in Materials for Demanding Environments at the University of Manchester. His principal research interests are advanced manufacturing and materials processing, linking processing methodology to the in-service life of resulting components. He most recently has focussed this interest into a coordinated effort to predict and characterise residual stress and weld metallurgy.

Hadi Moztarzadeh: Senior Fellow in Mechanical Engineering, WMG, University of Warwick

Mr Hadi Moztarzadeh (CEng, MIMechE) is a Senior Fellow in Mechanical Engineering at WMG, University of Warwick. His research focuses on Stress Analysis and Simulation mainly for Additive Manufacturing (AM). Hadi has been the Principal Investigator (PI) on a number of projects to determine residual stress in metal-AM, using non-destructive diffraction techniques and destructive methods. He has been developing a Finite Element model for a metal-based AM process, where a range of experimental stress analysis is employed to validate the simulation work-package. Hadi graduated in Mechanical Engineering (MSc) from University of Sheffield and conducting research towards PhD at University of Warwick.

Wei Li: Materials Technologist, Rolls-Royce

Dr Wei Li undertook his PhD study on machining induced residual stress in the University of Manchester from 2004 to 2007 and has been working in Rolls-Royce Materials Engineering for nearly 10 years. He is the subject matter expert in high temperature structural materials, responsible for the materials capability acquisition strategy for structural components. He has extensive experience with a wide spectrum of nickel alloys and components made via casting, forging, rolling, powder metallurgy, machining and additive manufacturing processes. He has an interest in materials physics and micromechanics of crystal plasticity, grain boundary integrity, microcrack initiation, crack tip stress field etc.

Li Xu: Senior Specialist, Fracture Mechanics & Fatigue Analysis, Lloyd’s Register Marine & Offshore

Li Xu graduated from Dalian University of Technology in China with an MSc Naval Architecture degree. Then I came to UK and completed my PhD at University of Strathclyde, Glasgow, investigating breaking wave impact on FPSO bows through experiments. I then continued post doctoral research investigating the simplified method of fatigue and fracture analysis for structures with discontinuity. In 2015 I joined industry (Lloyd’s Register Marine & Offshore) working on jobs related to fatigue and fracture. Since then I started to deal with residual stresses in industry applications.

Tom Siddall: Group Head of Structural Analysis Group, Structural Integrity Branch, EDF Energy

Tom Siddall is a mechanical engineer with 24 years’ experience in structures and dynamics. Early career began in heavy industry before moving to aerospace Engineering where I worked on structural design of flight controls and aircraft under carriage, including BAe Systems Hawk, Eurofighter Typhoon and Airbus 400M. Moved to EDF Energy in 2008, to support the UKs fleet of nuclear power stations. Discipline areas include blast and impact dynamics, fatigue, fracture mechanics and high temperature creep. Currently oversee a team of 20 structural analysts, providing technical support and governance for emergent station events and safety case development.

Charlie Bates: Consultant, Frazer-Nash Consultancy

Charlie Bates has a master’s degree in mechanical engineering from University College London. He has been working as a mechanical integrity consultant at Frazer-Nash for over five years. Here he has undertaken many stress analysis projects using finite element analysis and fracture mechanics techniques. These projects have been for a variety of industry sectors including oil & gas, nuclear, aerospace and power generation. Charlie is often required to apply the latest assessment techniques in his work and has undertaken research tasks whilst at Frazer-Nash, for example considering the effect of constraint on fracture toughness.

Philippe Bastid: Principal Project Leader, TWI Ltd

Philippe Bastid obtained his PhD from Ecole des Mines de Paris in 1995, working on the thermomechanical behaviour of cast iron. He spent five years at Imperial College, London, modelling the behaviour of titanium aluminides and porous materials. He joined TWI in 2001, working on a range of projects, such as stress analysis for structural assessment, fracture analysis, weld modelling for prediction of residual stresses. He recently characterised fatigue crack growth in austenitic steels from small scale tests at negative R ratios and applied the data to predict the fatigue life of structural specimens with compressive residual stresses from welding.

Nicholas O'Meara: Project Leader, TWI Ltd

Nick O'Meara has worked at TWI since January 2016. Previously, he used finite element analysis techniques to predict microstructures and residual stresses in nuclear pressure vessel steel welds at the University of Manchester as part of a nuclear materials Engineering Doctorate. His current activities include managing projects relating to the structural performance of welded structures. These projects often involve predicting the evolution of welding induced characteristics such a residual stresses, distortion, microstructure, material properties and hydrogen distribution.

Tony Fry: Science Area Leader, National Physical Laboratory

Tony Fry has been working at the National Physical Laboratory in high temperature materials and residual stress measurement for 20 years. During this time he has worked on quantifying the alignment during low cycle fatigue tests, measuring the heat transfer of materials, development of residual stresses and the measurement and degradation of alloys in high temperature steam environments. A particular focus of his work is to harmonise testing procedures to reduce the uncertainty and scatter between laboratories and to improve the understanding of material measurement. He is the Science Area Leader at NPL for the Advanced Material Characterisation Group.

Catrin Mair Davies: Senior Lecturer, Imperial College London

John Bouchard: Materials Engineering Research Lead, Open University

Professor John Bouchard is a Fellow of the Institution of Mechanical Engineers and leads Materials Engineering research within the School of Engineering and Innovation at the Open University (OU). He is Director of StressMap, a business unit providing residual stress measurement services to industry, and is currently developing an International Stress Engineering Centre at Harwell in collaboration with the ISIS Facility. His personal research interests include measurement, modelling and management of residual stress, fracture mechanics and the high temperature performance of structural systems. He joined the OU in 2008 following a successful career in the nuclear industry.

Simon Quinn: Director, Research Institute for Industry (Rifi), University of Southampton

Joy Tao: HYA/HAR Component Life Assessment Lead, Structural Analysis Group, Structural Integrity Branch, EDF Energy