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All Outputs (19)

Porous calcium phosphate glass microspheres for orthobiologic applications (2018)
Journal Article
Hossain, K. M. Z., Patel, U., Kennedy, A. R., Macri-Pellizzeri, L., Sottile, V., Grant, D. M., …Ahmed, I. (2018). Porous calcium phosphate glass microspheres for orthobiologic applications. Acta Biomaterialia, 72, 396-406. https://doi.org/10.1016/j.actbio.2018.03.040

© 2018 Orthobiologics is a rapidly advancing field utilising cell-based therapies and biomaterials to enable the body to repair and regenerate musculoskeletal tissues. This paper reports on a cost-effective flame spheroidisation process for producti... Read More about Porous calcium phosphate glass microspheres for orthobiologic applications.

Measurement and simulation of pressure drop across replicated porous aluminium in the Darcy-Forchheimer regime (2018)
Journal Article
Otaru, A., Morvan, H., & Kennedy, A. R. (2018). Measurement and simulation of pressure drop across replicated porous aluminium in the Darcy-Forchheimer regime. Acta Materialia, 149, https://doi.org/10.1016/j.actamat.2018.02.051

Experimental measurements of the pressure drop across porous metals have been compared with computational fluid dynamics simulations, for the first time, for structures typified by large pores with small interconnecting “windows”. Structural informat... Read More about Measurement and simulation of pressure drop across replicated porous aluminium in the Darcy-Forchheimer regime.

A water-soluble core material for manufacturing hollow composite sections (2017)
Journal Article
Xiao, Z., Harper, L., Kennedy, A. R., & Warrior, N. (2017). A water-soluble core material for manufacturing hollow composite sections. Composite Structures, 182, https://doi.org/10.1016/j.compstruct.2017.09.058

This paper presents the development of a low-cost water-soluble core material, which is suitable for producing hollow composite structures via high pressure moulding processes, such as compression moulding and resin transfer moulding. The bulk materi... Read More about A water-soluble core material for manufacturing hollow composite sections.

Structural and physico-chemical analysis of calcium/ strontium substituted, near-invert phosphate based glasses for biomedical applications (2017)
Journal Article
Patel, U., Moss, R., Hossain, K., Kennedy, A., Barney, E., Ahmed, I., & Hannon, A. (2017). Structural and physico-chemical analysis of calcium/ strontium substituted, near-invert phosphate based glasses for biomedical applications. Acta Biomaterialia, 60, 109-127. https://doi.org/10.1016/j.actbio.2017.07.002

Neutron diffraction, 23Na and 31P NMR and FTIR spectroscopy have been used to investigate the structural effects of substituting CaO with SrO in a 40P2O5·(16 x)CaO·20Na2O·24MgO·xSrO glass, where x is 0, 4, 8, 12 and 16 mol%. The 31P solid-state NMR r... Read More about Structural and physico-chemical analysis of calcium/ strontium substituted, near-invert phosphate based glasses for biomedical applications.

A novel method for the manufacture of porous structures with multi-component, coated pores (2017)
Journal Article
Siddiq, A. R., & Kennedy, A. R. (2017). A novel method for the manufacture of porous structures with multi-component, coated pores. Materials Letters, 196, https://doi.org/10.1016/j.matlet.2017.03.100

A novel process is demonstrated which is able to produce porous structures with internal coatings. This is achieved using sacrificial porogens which are coated with a powder and which are then infiltrated by compression moulding using a molten polyme... Read More about A novel method for the manufacture of porous structures with multi-component, coated pores.

Pore-scale numerical investigation of pressure drop behaviour across open-cell metal foams (2017)
Journal Article
de Carvalho, T. P., Morvan, H., Hargreaves, D. M., Oun, H., & Kennedy, A. (2017). Pore-scale numerical investigation of pressure drop behaviour across open-cell metal foams. Transport in Porous Media, 117(2), 311-336. https://doi.org/10.1007/s11242-017-0835-y

The development and validation of a grid-based pore-scale numerical modelling methodology applied to five different commercial metal foam samples is described. The 3-D digital representation of the foam geometry was obtained by the use of X-ray micro... Read More about Pore-scale numerical investigation of pressure drop behaviour across open-cell metal foams.

The processing and properties of syntactic Al foams containing low cost expanded glass particles (2016)
Journal Article
Wright, A., & Kennedy, A. R. (in press). The processing and properties of syntactic Al foams containing low cost expanded glass particles. Advanced Engineering Materials, https://doi.org/10.1002/adem.201600467

Expanded glass particles (EGP) are used to manufacture Al syntactic foams using a simple vacuum casting method. Clamping of the casting in the stainless steel mold is observed when preheating the mold to >400?C, causing damage to the EGP, resulting i... Read More about The processing and properties of syntactic Al foams containing low cost expanded glass particles.

Assessing the potential for multi-functional “hybrid” porous Al-phase change material structures (2016)
Journal Article
Kennedy, A. R. (in press). Assessing the potential for multi-functional “hybrid” porous Al-phase change material structures. Materials Letters, 185, https://doi.org/10.1016/j.matlet.2016.08.104

This study reports the potential for porous aluminium structures, containing porosity in the region of 50–80%, to provide enhancement of the rate of energy capture in phase change materials, whilst being capable of providing a basic mechanical functi... Read More about Assessing the potential for multi-functional “hybrid” porous Al-phase change material structures.

Effect of solidification rate on pore connectivity of aluminium foams and its consequences on mechanical properties (2016)
Journal Article
Lázaro, J., Solórzano, E., Rodríguez-Pérez, M., & Kennedy, A. R. (in press). Effect of solidification rate on pore connectivity of aluminium foams and its consequences on mechanical properties. Materials Science and Engineering: A, 672, https://doi.org/10.1016/j.msea.2016.07.015

This study evaluates the influence of solidification rate on the generation and control of pore connectivity of closed-cell aluminium foams. Additionally, it gives the experimental support to evaluate and model the effect of this pore connectivity on... Read More about Effect of solidification rate on pore connectivity of aluminium foams and its consequences on mechanical properties.

The permeability of virtual macroporous structures generated by sphere packing models: comparison with analytical models (2016)
Journal Article
Otaru, A., & Kennedy, A. R. (in press). The permeability of virtual macroporous structures generated by sphere packing models: comparison with analytical models. Scripta Materialia, 124, https://doi.org/10.1016/j.scriptamat.2016.06.037

Realistic porous structures typical of those made by replication of packed beds of spherical particles have been produced by a novel modelling method. Fluid dynamics simulation of the permeability of these structures agrees well with experimental mea... Read More about The permeability of virtual macroporous structures generated by sphere packing models: comparison with analytical models.

The stabilising effect of oxides in foamed aluminium alloy scrap (2015)
Journal Article
Vinod Kumar, G., García-Moreno, F., Banhart, J., & Kennedy, A. R. (2015). The stabilising effect of oxides in foamed aluminium alloy scrap. International Journal of Materials Research, 106(9), https://doi.org/10.3139/146.111255

The expansion and stability of foams made from remelted aluminium alloy scrap has been studied. Foams made from scrap alloy contain oxide bi-films introduced from the swarf (machining chips and turnings) of LM26 alloy and these oxides act as stabiliz... Read More about The stabilising effect of oxides in foamed aluminium alloy scrap.

Tailoring the pressure-drop in multi-layered open-cell porous inconel structures (2015)
Journal Article
Oun, H., & Kennedy, A. R. (in press). Tailoring the pressure-drop in multi-layered open-cell porous inconel structures. Journal of Porous Materials, 22(6), https://doi.org/10.1007/s10934-015-0046-2

This study investigates the pressure-drop behaviour associated with airflow through bulk and structurally tailored multi-layered, open-cell porous Inconel structures over a wide airflow velocity range (0–50 m s-1). The effect of airflow velocity on t... Read More about Tailoring the pressure-drop in multi-layered open-cell porous inconel structures.

Porous titanium manufactured by a novel powder tapping method using spherical salt bead space holders: characterisation and mechanical properties (2015)
Journal Article
Jia, J., Siddiq, A. R., & Kennedy, A. R. (2015). Porous titanium manufactured by a novel powder tapping method using spherical salt bead space holders: characterisation and mechanical properties. Journal of the Mechanical Behavior of Biomedical Materials, 48, https://doi.org/10.1016/j.jmbbm.2015.04.018

Porous Ti with open porosity in the range of 70–80% has been made using Ti powder and a particulate leaching technique using porous, spherical, NaCl beads. By incorporating the Ti powder into a pre-existing network of salt beads, by tapping followed... Read More about Porous titanium manufactured by a novel powder tapping method using spherical salt bead space holders: characterisation and mechanical properties.

Porous poly-ether ether ketone (PEEK) manufactured by a novel powder route using near-spherical salt bead porogens: characterisation and mechanical properties (2014)
Journal Article
Siddiq, A. R., & Kennedy, A. R. (2015). Porous poly-ether ether ketone (PEEK) manufactured by a novel powder route using near-spherical salt bead porogens: characterisation and mechanical properties. Materials Science and Engineering: C, 47, https://doi.org/10.1016/j.msec.2014.11.044

Porous PEEK structures with approximately 85% open porosity have been made using PEEK-OPTIMA® powder and a particulate leaching technique using porous, near-spherical, sodium chloride beads. A novel manufacturing approach is presented and compared wi... Read More about Porous poly-ether ether ketone (PEEK) manufactured by a novel powder route using near-spherical salt bead porogens: characterisation and mechanical properties.

A study of an improved cutting mechanism of composite materials using novel design of diamond micro-core drills (2014)
Journal Article
Butler-Smith, P. W., Axinte, D. A., Daine, M., Kennedy, A. R., Harper, L. T., Bucourt, J. F., & Ragueneau, R. (2015). A study of an improved cutting mechanism of composite materials using novel design of diamond micro-core drills. International Journal of Machine Tools and Manufacture, 88, 175-183. https://doi.org/10.1016/j.ijmachtools.2014.10.002

Core drilling at small diameters in carbon composite materials is largely carried out using diamond electroplated tools consisting of hollow shafts and simplistic geometries that are likely to work in an abrasional/rubbing mode for material removal.... Read More about A study of an improved cutting mechanism of composite materials using novel design of diamond micro-core drills.

Experimental investigation of pressure-drop characteristics across multi-layer porous metal structures (2014)
Journal Article
Oun, H., & Kennedy, A. R. (in press). Experimental investigation of pressure-drop characteristics across multi-layer porous metal structures. Journal of Porous Materials, 21(6), https://doi.org/10.1007/s10934-014-9863-y

This study investigates the effect of airflow (in the range of 0–70 m s-1) on the pressure-drop characteristics for a novel multi-layered, nickel-based porous metal, as a function of thickness (affected by sectioning) and density (affected by compres... Read More about Experimental investigation of pressure-drop characteristics across multi-layer porous metal structures.

Discrete element modelling of flexible fibre packing (2014)
Journal Article
Langston, P., Kennedy, A. R., & Constantin, H. (2015). Discrete element modelling of flexible fibre packing. Computational Materials Science, 96(A), https://doi.org/10.1016/j.commatsci.2014.09.007

This paper presents Discrete Element Model simulations of packing of non-cohesive flexible fibres in a cylindrical vessel. No interstitial fluid effects are modelled. Each fibre-particle is modelled as a series of connected sphero-cylinders. In an in... Read More about Discrete element modelling of flexible fibre packing.

Discrete element modelling of the packing of spheres and its application to the structure of porous metals made by infiltration of packed beds of NaCl beads (2014)
Journal Article
Langston, P., & Kennedy, A. R. (2014). Discrete element modelling of the packing of spheres and its application to the structure of porous metals made by infiltration of packed beds of NaCl beads. Powder Technology, 268, 210-218. https://doi.org/10.1016/j.powtec.2014.08.018

A numerical model, using the discrete element method, has been developed to quantify specific parameters that are pertinent to the packing behaviour of relatively large, spherical NaCl beads and mixtures of beads of different sizes. These parameters... Read More about Discrete element modelling of the packing of spheres and its application to the structure of porous metals made by infiltration of packed beds of NaCl beads.