Research Repository

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Optimisation of local in-plane constraining forces in double diaphragm forming (2018)
Journal Article
Chen, S., McGregor, O., Harper, L., Endruweit, A., & Warrior, N. (in press). Optimisation of local in-plane constraining forces in double diaphragm forming. Composite Structures, doi:10.1016/j.compstruct.2018.06.062. ISSN 0263-8223

Rigid blocks (risers) were introduced in the double diaphragm forming (DDF) process to change the local in-plane strain distribution in the diaphragms, aimed at reducing wrinkling defects in the production of fabric preforms. A two-step optimisation... Read More

Simulating damage onset and evolution in fully bio-resorbable composite under three-point bending (2018)
Journal Article
Gao, X., Chen, M., Yang, X., Harper, L., Ahmed, I., & Lu, J. (2018). Simulating damage onset and evolution in fully bio-resorbable composite under three-point bending. Journal of the Mechanical Behavior of Biomedical Materials, 81, doi:10.1016/j.jmbbm.2018.02.022. ISSN 1751-6161

This paper presents a strain-based damage model to predict the stress-strain relationship and investigate the damage onset and evolution of the fibre and matrix of a fully bio-resorbable phosphate glass fibre reinforced composite under three-point be... Read More

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, doi:10.1016/j.compstruct.2017.09.058. ISSN 0263-8223

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

Long discontinuous carbon fibre/polypropylene composites for high volume structural applications (2017)
Journal Article
composites for high volume structural applications. Journal of Composite Materials, doi:10.1177/0021998317722204. ISSN 0021-9983

A processing route is presented to manufacture discontinuous carbon fibre reinforced polypropylene (CF.PP) composites, using much longer fibre lengths (25mm) and higher volume fractions (up to 45%) than previously reported in the literature. Carbon f... Read More

Double diaphragm forming simulation for complex composite structures (2017)
Journal Article
Chen, S., McGregor, O., Endruweit, A., Elsmore, M., De Focatiis, D., Harper, L., & Warrior, N. (in press). Double diaphragm forming simulation for complex composite structures. Composites Part A: Applied Science and Manufacturing, 95, doi:10.1016/j.compositesa.2017.01.017. ISSN 1359-835X

A finite element (FE) model has been developed to simulate the double diaphragm forming (DDF) process, to identify potential defects when forming complex 3D preforms from 2D biaxial non-crimp fabric plies. Three different metrics have been introduced... Read More

Compression moulding of composites with hybrid fibre architectures (2016)
Journal Article
Corbridge, D., Harper, L. T., De Focatiis, D. S., & Warrior, N. (2017). Compression moulding of composites with hybrid fibre architectures. Composites Part A: Applied Science and Manufacturing, 95, doi:10.1016/j.compositesa.2016.12.018. ISSN 1359-835X

Advanced Sheet Moulding Compounds (ASMC) and unidirectional (UD) prepregs have been co-compression moulded to form a hybrid composite material. In-mould flow influences the UD fibre architecture in two ways. When UD fibres are aligned transversely to... Read More

3D geometric modelling of discontinuous fibre composites using a force-directed algorithm (2016)
Journal Article
Harper, L., Qian, C., Luchoo, R., & Warrior, N. (2016). 3D geometric modelling of discontinuous fibre composites using a force-directed algorithm. Journal of Composite Materials, doi:10.1177/0021998316672722. ISSN 0021-9983

A geometrical modelling scheme is presented to produce representative architectures for discontinuous fibre composites, enabling downstream modelling of mechanical properties. The model generates realistic random fibre architectures containing high f... Read More

Defect formation during preforming of a bi-axial non-crimp fabric with a pillar stitch pattern (2016)
Journal Article
Chen, S., McGregor, O., Harper, L., Endruweit, A., & Warrior, N. (2016). Defect formation during preforming of a bi-axial non-crimp fabric with a pillar stitch pattern. Composites Part A: Applied Science and Manufacturing, 91, doi:10.1016/j.compositesa.2016.09.016. ISSN 1359-835X

To capture the asymmetrical shear behaviour of a bi-axial NCF with a pillar stitch, a non-orthogonal constitutive model was developed and implemented in finite element forming simulations. Preforming experiments indicate that the local distribution o... Read More

Flow characteristics of carbon fibre moulding compounds (2016)
Journal Article
Evans, A., Qian, C., Turner, T., Harper, L., & Warrior, N. (2016). Flow characteristics of carbon fibre moulding compounds. Composites Part A: Applied Science and Manufacturing, 90, doi:10.1016/j.compositesa.2016.06.020. ISSN 1359-835X

This paper presents the development of a low-cost carbon fibre moulding compound using an automated spray deposition process. Directed Fibre Compounding (DFC) is used to produce charge packs directly from low cost carbon fibre tows and liquid epoxy r... Read More

The usability of recycled carbon fibres in short fibre thermoplastics: interfacial properties (2016)
Journal Article
Burn, D., Harper, L. T., Johnson, M., Warrior, N., Nagel, U., Yang, L., & Thomason, J. (in press). The usability of recycled carbon fibres in short fibre thermoplastics: interfacial properties. Journal of Materials Science, doi:10.1007/s10853-016-0053-y. ISSN 0022-2461

The objective of this study was to investigate the feasibility of combining discontinuous recycled carbon fibres with polypropylene, to produce a low-cost, high specific stiffness material for high-volume applications. The inherent low affinity of ca... Read More

Optimisation of composite bone plates for ulnar transverse fractures (2016)
Journal Article
Chakladar, N. D., Harper, L. T., & Parsons, A. J. (2016). Optimisation of composite bone plates for ulnar transverse fractures. Journal of the Mechanical Behavior of Biomedical Materials, 57, doi:10.1016/j.jmbbm.2016.01.029. ISSN 1751-6161

Metallic bone plates are commonly used for arm bone fractures where conservative treatment (casts) cannot provide adequate support and compression at the fracture site. These plates, made of stainless steel or titanium alloys, tend to shield stress t... Read More

Formability optimisation of fabric preforms by controlling material draw-in through in-plane constraints (2015)
Journal Article
Chen, S., Harper, L., Endruweit, A., & Warrior, N. (2015). Formability optimisation of fabric preforms by controlling material draw-in through in-plane constraints. Composites Part A: Applied Science and Manufacturing, 76, doi:10.1016/j.compositesa.2015.05.006. ISSN 1359-835X

A genetic algorithm is coupled with a finite element model to optimise the arrangement of constraints for a composite press-forming study. A series of springs are used to locally apply in-plane tension through clamps to the fibre preform to control m... Read More

Inter-ply stitching optimisation of highly drapeable multi-ply preforms (2015)
Journal Article
Chen, S., Endruweit, A., Harper, L., & Warrior, N. (2015). Inter-ply stitching optimisation of highly drapeable multi-ply preforms. Composites Part A: Applied Science and Manufacturing, 71, doi:10.1016/j.compositesa.2015.01.016. ISSN 1359-835X

An efficient finite element model has been developed in Abaqus/Explicit to solve highly non-linear fabric forming problems, using a non-orthogonal constitutive relation and membrane elements to model bi-axial fabrics. 1D cable-spring elements have be... Read More

Heterogeneity of discontinuous carbon fibre composites: damage initiation captured by Digital Image Correlation (2014)
Journal Article
Johanson, K., Harper, L., Johnson, M. S., & Warrior, N. (2015). Heterogeneity of discontinuous carbon fibre composites: damage initiation captured by Digital Image Correlation. Composites Part A: Applied Science and Manufacturing, 68, doi:10.1016/j.compositesa.2014.10.014. ISSN 1359-835X

This paper aims to identify architectural features which lead to damage initiation and failure in discontinuous carbon fibre composites formed from randomly orientated bundles. A novel multi-camera digital image correlation system was used to simulta... Read More

Structural optimisation of random discontinuous fibre composites: Part 2 - case study (2014)
Journal Article
Qian, C., Harper, L., Turner, T., & Warrior, N. (2015). Structural optimisation of random discontinuous fibre composites: Part 2 - case study. Composites Part A: Applied Science and Manufacturing, 68, doi:10.1016/j.compositesa.2014.09.004

This is the second paper in a two part series presenting the development of a stiffness optimisation algorithm to intelligently optimise the fibre architecture of discontinuous fibre composites. A Multi-Criteria Decision Making (MCDM) strategy is use... Read More

Structural optimisation of random discontinuous fibre composites: Part 1 – Methodology (2014)
Journal Article
Qian, C., Harper, L., Turner, T., & Warrior, N. (2015). Structural optimisation of random discontinuous fibre composites: Part 1 – Methodology. Composites Part A: Applied Science and Manufacturing, 68, 406-416. doi:10.1016/j.compositesa.2014.08.024

This paper presents a finite element model to optimise the fibre architecture of components manufactured from discontinuous fibre composites. An optimality criterion method has been developed to maximise global component stiffness, by determining opt... Read More

Mechanical, degradation and cytocompatibility properties of magnesium coated phosphate glass fibre reinforced polycaprolactone composites (2014)
Journal Article
magnesium coated phosphate glass fibre reinforced polycaprolactone composites. Journal of Biomaterials Applications, 29(5), doi:10.1177/0885328214541302. ISSN 0885-3282

Retention of mechanical properties of phosphate glass fibre reinforced degradable polyesters such as polycaprolactone and polylactic acid in aqueous media has been shown to be strongly influenced by the integrity of the fibre/polymer interface. A pre... Read More