An investigation of the failure mechanisms in high temperature materials subjected to isothermal and anisothermal fatigue and creep conditions

Hyde, Christopher J.; Sun, Wei; Hyde, T.H.

doi:10.1016/j.proeng.2011.04.192

Visualizing charge separation in bulk heterojunction organic solar cells (2013)
Journal Article
Vithanage, D. A., Devižis, A., Abramavičius, V., Infahsaeng, Y., Abramavičius, D., MacKenzie, R., …Gulbinas, V. (2013). Visualizing charge separation in bulk heterojunction organic solar cells. Nature Communications, 4, Article 2334. https://doi.org/10.1038/ncomms3334

Solar cells based on conjugated polymer and fullerene blends have been developed as a low-cost alternative to silicon. For efficient solar cells, electron–hole pairs must separate into free mobile charges that can be extracted in high yield. We still... Read More about Visualizing charge separation in bulk heterojunction organic solar cells.

Characterization of viscoplasticity behaviour of P91 and P92 power plant steels (2013)
Journal Article
Saad, A. A., Hyde, T., Sun, W., Hyde, C. J., & Tanner, D. W. J. (2013). Characterization of viscoplasticity behaviour of P91 and P92 power plant steels. International Journal of Pressure Vessels and Piping, 111-112, https://doi.org/10.1016/j.ijpvp.2013.08.001

This paper deals with the determination of material constitutive model for P91 and P92 steels at high temperatures. An isothermal, strain-controlled test programme was conducted for both steels for a temperature range between 400 and 675 °C. The expe... Read More about Characterization of viscoplasticity behaviour of P91 and P92 power plant steels.

Anionic polymerisation of caprolactam at the small-scale via DSC investigations (2013)
Journal Article
Khodabakhshi, K., Gilbert, M., Fathi, S., & Dickens, P. (2014). Anionic polymerisation of caprolactam at the small-scale via DSC investigations. Journal of Thermal Analysis and Calorimetry, 115, 383-391. https://doi.org/10.1007/s10973-013-3344-4

This work was part of a major project aiming to produce polyamide 6 parts using an additive manufacturing process. This is by manufacturing 3D parts layer by layer. The influence of heating strategy (heating rate, cooling rate and maximum temperature... Read More about Anionic polymerisation of caprolactam at the small-scale via DSC investigations.

Comparison of several optimisation strategies for the determination of material constants in the Chaboche visco-plasticity model (2013)
Journal Article
Rouse, J. P., Hyde, C. J., Sun, W., & Hyde, T. (2013). Comparison of several optimisation strategies for the determination of material constants in the Chaboche visco-plasticity model. Journal of Strain Analysis for Engineering Design, 48(6), https://doi.org/10.1177/0309324713490925

Determining representative material constant sets for models that can accurately predict the complex plasticity and creep behaviour of components undergoing cyclic loading is of great interest to many industries. The Chaboche unified visco-plasticity... Read More about Comparison of several optimisation strategies for the determination of material constants in the Chaboche visco-plasticity model.

Effective determination of cyclic-visco-plasticity material properties using an optimisation procedure and experimental data exhibiting scatter (2013)
Journal Article
Rouse, J. P., Hyde, C. J., Sun, W., & Hyde, T. H. (2013). Effective determination of cyclic-visco-plasticity material properties using an optimisation procedure and experimental data exhibiting scatter. Materials at High Temperatures, 30(2), 117-128. https://doi.org/10.3184/096034013x13720928952114

It may be inevitable in the design and analysis of most high temperature components (such as power industry pipe work) that variations in load and/or temperature will occur in normal operation. This presents complications in the prediction of the res... Read More about Effective determination of cyclic-visco-plasticity material properties using an optimisation procedure and experimental data exhibiting scatter.

Introducing PEGI: a usability process for the practical evaluation of Geographic Information (2013)
Journal Article
Brown, M., Sharples, S., & Harding, J. (2013). Introducing PEGI: a usability process for the practical evaluation of Geographic Information. International Journal of Human-Computer Studies, 71(6), https://doi.org/10.1016/j.ijhcs.2013.01.004

As the use of Geographic Information (GI) is becoming more widespread, the usability of GI is being recognised as an important issue. However, exploring the usability of information products brings with it a range of problems that are not easily han... Read More about Introducing PEGI: a usability process for the practical evaluation of Geographic Information.

Viscoelastic melt rheology and time-temperature superposition of polycarbonate – multi-walled carbon nanotube nanocomposites (2013)
Journal Article
Choong, G. Y., De Focatiis, D. S., & Hassell, D. G. (in press). Viscoelastic melt rheology and time-temperature superposition of polycarbonate – multi-walled carbon nanotube nanocomposites. Rheologica Acta, 52(8), https://doi.org/10.1007/s00397-013-0706-6

This work investigates the linear and non-linear viscoelastic melt rheology of four grades of polycarbonate melt-compounded with 3 wt% Nanocyl NC7000 multi-walled carbon nanotubes and of the matching matrix polymers. Amplitude sweeps reveal an earlie... Read More about Viscoelastic melt rheology and time-temperature superposition of polycarbonate – multi-walled carbon nanotube nanocomposites.

Topographical and chemical effects of electrochemically assisted deposited hydroxyapatite coatings on osteoblast-like cells (2013)
Journal Article
Pegg, E. C., Matboli, F., Marriott, T., Khan, I., & Scotchford, C. (2014). Topographical and chemical effects of electrochemically assisted deposited hydroxyapatite coatings on osteoblast-like cells. Journal of Biomaterials Applications, 28(6), https://doi.org/10.1177/0885328213487410

A recently commercialised hydroxyapatite electrochemically assisted chemical deposition technique (BoneMaster) has been shown to induce increased bone apposition; whether this response is caused by the surface topography or chemistry is unknown. An i... Read More about Topographical and chemical effects of electrochemically assisted deposited hydroxyapatite coatings on osteoblast-like cells.

Participant experiences of mobile device-based diary studies (2013)
Journal Article
Sun, X., Golightly, D., Cranwell, J., Bedwell, B. D., & Sharples, S. (2013). Participant experiences of mobile device-based diary studies. International Journal of Mobile Human Computer Interaction, 5(2), https://doi.org/10.4018/jmhci.2013040104

Mobile device-based diary studies have potential as contextual data capture methods that address the limitations of the traditional paper-based diary method. While there have been a number of studies that demonstrate the power of the mobile device-ba... Read More about Participant experiences of mobile device-based diary studies.

Development of a smoke visualisation system for wind tunnel laboratory experiments (2013)
Journal Article
Trinder, M., & Jabbal, M. (2013). Development of a smoke visualisation system for wind tunnel laboratory experiments. International Journal of Mechanical Engineering Education, 41(1), https://doi.org/10.7227/IJMEE.41.1.5

The design, build and test of a smoke visualisation system for a vertical wind tunnel at Brunel University are described. The smoke visualisation system utilised a fog machine for smoke generation and required the design and manufacture of a smoke ra... Read More about Development of a smoke visualisation system for wind tunnel laboratory experiments.

Active fixturing: literature review and future research directions (2013)
Journal Article
Bakker, O. J., Papastathis, T., Popov, A. A., & Ratchev, S. (2013). Active fixturing: literature review and future research directions. International Journal of Production Research, 51(11), https://doi.org/10.1080/00207543.2012.695893

Fixtures are used to fixate, position and support workpieces and represent a crucial tool in manufacturing. Their performance determines the result of the whole manufacturing process of a product. There is a vast amount of research done on automatic... Read More about Active fixturing: literature review and future research directions.

Recent research on flexible fixtures for manufacturing processes (2013)
Journal Article
Bakker, O. J., Papastathis, T., Ratchev, S., & Popov, A. A. (2013). Recent research on flexible fixtures for manufacturing processes. Recent Patents on Mechanical Engineering, 6(2), https://doi.org/10.2174/2212797611306020003

Fixtures, are used to fixate, position and support workpieces, and form a crucial tool in manufacturing. Their performance influences the manufacturing (and assembly) process of a product. Furthermore, fixturing can form a significant portion of the... Read More about Recent research on flexible fixtures for manufacturing processes.

Near-net-shape production of hollow titanium alloy components via electrochemical reduction of metal oxide precursors in molten salts (2013)
Journal Article
Hu, D., Xiao, W., & Chen, G. Z. (2013). Near-net-shape production of hollow titanium alloy components via electrochemical reduction of metal oxide precursors in molten salts. Metallurgical and Materials Transactions B, 44(2), 272-282. https://doi.org/10.1007/s11663-013-9800-5

Metal oxide precursors (ca. 90 wt pct Ti, 6 wt pct Al, and 4 wt pct V) were prepared with a hollow structure in various shapes such as a sphere, miniature golf club head, and cup using a one-step solid slip-casting process. The precursors were then e... Read More about Near-net-shape production of hollow titanium alloy components via electrochemical reduction of metal oxide precursors in molten salts.

Transient serum exposure regimes to support dual differentiation of human mesenchymal stem cells (2012)
Journal Article
France, L., Scotchford, C., Grant, D., Rashidi, H., Popov, A., & Sottile, V. (2014). Transient serum exposure regimes to support dual differentiation of human mesenchymal stem cells. Journal of Tissue Engineering and Regenerative Medicine, 8(8), https://doi.org/10.1002/term.1567

Human mesenchymal stem cells (MSCs), which can generate both osteoblasts and chondrocytes, represent an ideal resource for orthopaedic repair using tissue-engineering approaches. One major difficulty for the development of osteochondral constructs us... Read More about Transient serum exposure regimes to support dual differentiation of human mesenchymal stem cells.

Advanced geometry modelling of 3D woven reinforcements in polymer composites: processing and performance analysis (2012)
Conference Proceeding
Zeng, X., Brown, L. P., Endruweit, A., & Long, A. C. (2012). Advanced geometry modelling of 3D woven reinforcements in polymer composites: processing and performance analysis.

Numerical methods have become increasingly effective tools for analysis and design of composite materials. This study investigates how the inclusion of geometrical variations in modelling 3D woven fabrics affects the accuracy of numerical predictions... Read More about Advanced geometry modelling of 3D woven reinforcements in polymer composites: processing and performance analysis.

Thermo-mechanical fatigue testing and simulation using a viscoplasticity model for a P91 steel (2012)
Journal Article
Hyde, C. J., Sun, W., Hyde, T., & Saad, A. (2012). Thermo-mechanical fatigue testing and simulation using a viscoplasticity model for a P91 steel. Computational Materials Science, 56, https://doi.org/10.1016/j.commatsci.2012.01.006

An experimental programme of cyclic thermo-mechanical testing for a P91 power plant steel, under isothermal, and in-phase and out-of-phase thermo-mechanical, temperature-strain cycle conditions, has been implemented. Using the experimental data, an o... Read More about Thermo-mechanical fatigue testing and simulation using a viscoplasticity model for a P91 steel.

A toolbox for parameter-free predictions of solid-state properties of monodisperse glassy polymers with frozen-in molecular orientation (2012)
Journal Article
De Focatiis, D. S., & Buckley, C. P. (2012). A toolbox for parameter-free predictions of solid-state properties of monodisperse glassy polymers with frozen-in molecular orientation. Journal of Polymer Science Part B: Polymer Physics, 50(24), https://doi.org/10.1002/polb.23196

A toolbox that allows designers to predict the properties of oriented glassy polymers using only existing material constants is constructed from a constitutive model applicable to both polymer solids and polymer melts. Two solid-state properties of p... Read More about A toolbox for parameter-free predictions of solid-state properties of monodisperse glassy polymers with frozen-in molecular orientation.

The use of vignettes for conducting healthcare research (2012)
Book Chapter
Keane, D., Lang, A. R., Craven, M. P., & Sharples, S. (2012). The use of vignettes for conducting healthcare research. In V. G. Duffy (Ed.), Advances in human aspects of healthcare. San Franciso, USA: CRC Press

Improving healthcare requires engaging with clinicians and patients in order to better understand their needs and expectations. Research methods that are used to conduct healthcare research are selected on the basis of study objectives and practicali... Read More about The use of vignettes for conducting healthcare research.

A geometric parameter study of piezoelectric coverage on a rectangular cantilever energy harvester (2011)
Journal Article
Patel, R., McWilliam, S., & Popov, A. (2011). A geometric parameter study of piezoelectric coverage on a rectangular cantilever energy harvester. Smart Materials and Structures, 20(8), Article 085004. https://doi.org/10.1088/0964-1726/20/8/085004

This paper proposes a versatile model for optimizing the performance of a rectangular cantilever beam piezoelectric energy harvester used to convert ambient vibrations into electrical energy. The developed model accounts for geometric changes to the... Read More about A geometric parameter study of piezoelectric coverage on a rectangular cantilever energy harvester.

An investigation of the failure mechanisms in high temperature materials subjected to isothermal and anisothermal fatigue and creep conditions (2011)
Journal Article
Hyde, C. J., Sun, W., & Hyde, T. (in press). An investigation of the failure mechanisms in high temperature materials subjected to isothermal and anisothermal fatigue and creep conditions. Procedia Engineering, 10, https://doi.org/10.1016/j.proeng.2011.04.192

Many engineering components are subjected to conditions which have a detrimental effect on the materials from which they are made. Such components are used, for example, within high temperature regions of aeroengines (e.g. turbine discs) and power pl... Read More about An investigation of the failure mechanisms in high temperature materials subjected to isothermal and anisothermal fatigue and creep conditions.

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