Wei Wang Ruiqiang Zhang Amir A Shirzardi Daniel S Balint Lee Aucott Jun Jiang
Thermally-induced cracking typically occurs during the cooling stage of various manufacturing processes, and is commonly seen in multiphase or the joints of dissimilar materials due to mismatch in their thermo-mechanical properties, such as thermal expansion, elastic-plastic deformation and, in some cases, phase transformation. However, the underly…
Preprint PublishedRory Spencer Lloyd Fletcher Mike Gorley Cory Hamelin Allan Harte
Constitutive behaviour of fusion-relevant steels in the post-necking regime is necessary for detailed design of future fusion device components. A Finite Element Model Updating (FEMU) procedure using Digital Image Correlation (DIC), a simulated DIC filter and novel constitutive law was developed. The effects of the DIC process and experimental nois…
PreprintC.A. Middleton K. Amjad R.J. Greene E. Hack L. Harris A. Kupferschmid P.R. Lambert E.A. Patterson
A small, novel, integrated SHM system has been deployed during full-scale testing of a wing fatigue test and a fuselage pressurisation test. Complementary NDE measurement techniques were combined, with inputs from visible and infrared optical sensors, as well as resistance strain gauges. Sensor unitswere deployed at regions of interest and int…
PreprintRenato Pero Nicholas Randall Damian Frey Remo Widmer Tim Darby Lee Aucott Chris Hardie Sunil Pak Philippe Maquet Andrew Bushby
The International Thermonuclear Experimental Reactor (ITER) is an international nuclear fusion research and engineering project with the aim to prove the feasibility of nuclear fusion as a large-scale carbon-free source of energy. The reactor vessel contains several diagnostic windows that provide a line of sight to the plasma. Design and qualif…
PreprintA. Matejunas L. Fletcher L. Lamberson
Due to the strong rate dependence in their mechanical response, polymers find widespread use in applications subject to impact loading. However, characterizing these materials on microsecond time scales has proven challenging. Traditional experimental techniques rely on satisfying a number of limiting assumptions and typically do not provide direct…
PreprintJ. Öijerholm C. Harrington P. Gillen A. Harte L. Volpe J-H. You
In-vessel plasma facing components in fusion reactors such as ITER and DEMO experience high thermal loads and require active cooling, for which water is one possible coolant. The solution where plasma facing components utilise tungsten blocks as sacrificial armour has a joint internal structure of cooling tubes made from the copper base (~99% Cu…
Preprint PublishedWei Wang Daniel S Balint Amir A Shirzadi Yaping Wang Junyi Lee Lee Aucott Jun Jiang
Understanding the effects of interfacial micro-structures/-defects such as voids, grain boundaries (GB) and partial recrystallization (Rx) is critical to achieving superior mechanical properties for safety-critical parts. These features may appear during advanced manufacturing processes such as sintering, additive manufacturing (AM), and diffusi…
Preprint PublishedM. J. Carrington J. L. Daure S. Utada V. L. Ratia-Hanby D. A. Stewart P. H. Shipway D. G. McCartney
Multiphase Fe-based hardfacing alloys, for example Tristelle 5183 Fe-21%Cr-10%Ni7.5%Nb-5%Si-2%C in wt.%, are extensively used for tribological applications, including valves, bearings and drive mechanisms, where two surfaces are unavoidably subjected to loaded sliding contact within engineering systems. In this study, transmission electron microsco…
PreprintD. Lunt R. Thomas D. Bowden M. T. P. Rigby-Bell S. de Moraes Shubeita C. Andrews T. Lapauw J. Vleugels J. Quinta da Fonseca K. Lambrinou P. Frankel
Materials subjected to irradiation damage often undergo local changes in the microstructure that effect the expected performance. To investigate those changes, this work proposes a novel approach to detect strain localisation caused by irradiation-induced damage in nuclear materials on the microstructural level, conside…
PublishedE. J. Muttio W. G. Dettmera J. Clarke D. Peric Z. Ren L. Fletcher
A Supervised Parallel Optimisation (SPO) is presented. The proposed framework couples different optimisation algorithms to solve single-objective optimisation problems. The supervision balances the exploration and exploitation capabilities of the distinct optimisers included, providing a general framework to solve problems with diverse character…
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