All Outputs (44)

The Relationship Between the Extent of Indentation and Impact Damage in Carbon-Fibre Reinforced-Plastic Composites after a Low-Velocity Impact (2024)
Journal Article
Brooks, R., Liu, J., Hall, Z., Joesbury, A., Harper, L., Liu, H., …Dear, J. (2024). The Relationship Between the Extent of Indentation and Impact Damage in Carbon-Fibre Reinforced-Plastic Composites after a Low-Velocity Impact. Applied Composite Materials, https://doi.org/10.1007/s10443-024-10223-2

The present paper investigates the low-velocity impact behaviour of carbon-fibre reinforced-plastic (CFRP) composite panels and the damage incurred when they are subjected to a single impact. The relationship between the depth of permanent surface in... Read More about The Relationship Between the Extent of Indentation and Impact Damage in Carbon-Fibre Reinforced-Plastic Composites after a Low-Velocity Impact.

Thermoplastic composite injection-overmoulding with indirectly-loaded reinforcement: Design for manufacture (2024)
Journal Article
Parsons, A. J., Chen, S., Ryder, A., Bradley, D., Warrior, N. A., & Harper, L. T. (2024). Thermoplastic composite injection-overmoulding with indirectly-loaded reinforcement: Design for manufacture. Composite Structures, 337, Article 118056. https://doi.org/10.1016/j.compstruct.2024.118056

Thermoplastic Overmoulding is an emerging manufacturing method combining low-cost, high-rate injection moulding with continuous fibre composite elements. The combination of materials with dissimilar stiffnesses can create stress concentrations and wa... Read More about Thermoplastic composite injection-overmoulding with indirectly-loaded reinforcement: Design for manufacture.

Two-dimensional to three-dimensional dry fibre preforming (2023)
Book Chapter
Chen, S., & Harper, L. (2023). Two-dimensional to three-dimensional dry fibre preforming. In Design and Manufacture of Structural Composites (101-123). Elsevier. https://doi.org/10.1016/B978-0-12-819160-6.00005-6

Preforming is the process of converting two-dimensional (2D) intermediate fibre products, such as fabrics and mats, into complex three-dimensional (3D) shapes to resemble the geometry of the final component. Preforming is a necessary step for all liq... Read More about Two-dimensional to three-dimensional dry fibre preforming.

Cost, rate, and robustness (2023)
Book Chapter
Hancock, S., & Harper, L. (2023). Cost, rate, and robustness. In Design and Manufacture of Structural Composites (447-471). Elsevier. https://doi.org/10.1016/B978-0-12-819160-6.00022-6

This chapter outlines the most important considerations for the economic evaluation of composites, as assessing both cost and performance in parallel is critical for designing and manufacturing efficient applications. The cost of raw materials is oft... Read More about Cost, rate, and robustness.

Design and Manufacture of Structural Composites (2023)
Book
Harper, L., & Clifford, M. (Eds.). (2023). Design and Manufacture of Structural Composites. Elsevier. https://doi.org/10.1016/c2018-0-05165-8

Design and Manufacture of Structural Composites provides an overview of the main manufacturing challenges encountered when processing fibre-reinforced composite materials. Composites are unique in that the material is created at the same time as the... Read More about Design and Manufacture of Structural Composites.

Introduction (2023)
Book Chapter
Harper, L., & Clifford, M. (2023). Introduction. In Design and Manufacture of Structural Composites (3-17). Elsevier. https://doi.org/10.1016/b978-0-12-819160-6.00009-3

Fibre-reinforced polymer composites are acknowledged to offer some of the highest specific properties (stiffness, strength) of any engineering materials, but this chapter takes a look at why these materials are not more widely adopted for general str... Read More about Introduction.

A global-to-local sub modelling approach to investigate the effect of lubrication during double diaphragm forming of multi-ply biaxial non-crimp fabric preforms (2023)
Journal Article
Yu, F., Chen, S., Lawrence, G. D., Warrior, N. A., & Harper, L. T. (2023). A global-to-local sub modelling approach to investigate the effect of lubrication during double diaphragm forming of multi-ply biaxial non-crimp fabric preforms. Composites Part B: Engineering, 254, Article 110590. https://doi.org/10.1016/j.compositesb.2023.110590

The forming behaviour of preforms constructed from multiple plies of Non-Crimp Fabric (NCF) has been investigated for manufacturing a complex double-curved geometry using Double Diaphragm Forming (DDF). An established multi-resolution finite element... Read More about A global-to-local sub modelling approach to investigate the effect of lubrication during double diaphragm forming of multi-ply biaxial non-crimp fabric preforms.

Reinforcing fibres (2023)
Book Chapter
Parsons, A. (2023). Reinforcing fibres. In L. Harper, & M. Clifford (Eds.), Design and Manufacture of Structural Composites (19-34). Elsevier. https://doi.org/10.1016/B978-0-12-819160-6.00008-1

This chapter provides information on the type of reinforcing fibres commonly used in polymer composites. Inorganic and organic fibres are described along with general information on their manufacture, applications, and representative properties. Suit... Read More about Reinforcing fibres.

Rapidly predicting the effect of tool geometry on the wrinkling of biaxial NCFs during composites manufacturing using a deep learning surrogate model (2023)
Journal Article
Viisainen, J., Yu, F., Codolini, A., Chen, S., Harper, L., & Sutcliffe, M. (2023). Rapidly predicting the effect of tool geometry on the wrinkling of biaxial NCFs during composites manufacturing using a deep learning surrogate model. Composites Part B: Engineering, 253, Article 110536. https://doi.org/10.1016/j.compositesb.2023.110536

A deep learning surrogate model is developed to rapidly predict the wrinkling patterns of a biaxial non-crimp fabric (NCF) layup for any given tool geometry during forming. The underlying dataset of finite element simulations is used to investigate t... Read More about Rapidly predicting the effect of tool geometry on the wrinkling of biaxial NCFs during composites manufacturing using a deep learning surrogate model.

Modelling the effects of patch-plug configuration on the impact performance of patch-repaired composite laminates (2023)
Journal Article
Liu, H., Liu, J., Hall, Z. E., Brooks, R. A., Crocker, J. W., Joesbury, A. M., …Dear, J. P. (2023). Modelling the effects of patch-plug configuration on the impact performance of patch-repaired composite laminates. Composites Science and Technology, 233, Article 109917. https://doi.org/10.1016/j.compscitech.2023.109917

The patch-plug configuration has been widely used to repair composite structures and restore the structural integrity of damaged composites. In the present research, single-sided CFRP patch-repaired panels, with different patch-plug configurations, a... Read More about Modelling the effects of patch-plug configuration on the impact performance of patch-repaired composite laminates.

The influence of inter-ply friction during double-diaphragm forming of biaxial NCFs (2023)
Journal Article
Lawrence, G. D., Chen, S., Warrior, N. A., & Harper, L. T. (2023). The influence of inter-ply friction during double-diaphragm forming of biaxial NCFs. Composites Part A: Applied Science and Manufacturing, 167, Article 107426. https://doi.org/10.1016/j.compositesa.2023.107426

Inter-ply friction plays an important role in the formation of defects in automated preforming of complex components, as relative sliding between plies can generate local compressive stresses in the direction of the primary yarns, leading to out-of-p... Read More about The influence of inter-ply friction during double-diaphragm forming of biaxial NCFs.

Experimental and numerical investigations on the impact behaviour of pristine and patch-repaired composite laminates (2022)
Journal Article
Liu, H., Brooks, R. A., Hall, Z. E., Liu, J., Crocker, J. W., Joesbury, A. M., …Dear, J. P. (2022). Experimental and numerical investigations on the impact behaviour of pristine and patch-repaired composite laminates. Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, 380(2232), Article 20210340. https://doi.org/10.1098/rsta.2021.0340

The present paper investigates the impact behaviour of both pristine carbon-fibre-reinforced-plastic (CFRP) composite laminates and repaired CFRP laminates. For the patch-repaired CFRP specimen, the pristine CFRP panel specimen has been damaged by cu... Read More about Experimental and numerical investigations on the impact behaviour of pristine and patch-repaired composite laminates.

Multiscale viscoplastic modeling of recycled glass fiber-reinforced thermoplastic composites: Experimental and numerical investigations (2022)
Journal Article
Nachtane, M., Meraghni, F., Chatzigeorgiou, G., Harper, L., & Pelascini, F. (2022). Multiscale viscoplastic modeling of recycled glass fiber-reinforced thermoplastic composites: Experimental and numerical investigations. Composites Part B: Engineering, 242, Article 110087. https://doi.org/10.1016/j.compositesb.2022.110087

One of the main challenges facing fiber-reinforced polymer composites is the lack of options for end-of-life recycling. The environmental impact of waste materials disposed of at landfill sites, by incineration, or by erratic dispersion in the enviro... Read More about Multiscale viscoplastic modeling of recycled glass fiber-reinforced thermoplastic composites: Experimental and numerical investigations.

The effectiveness of patch repairs to restore the impact properties of carbon-fibre reinforced-plastic composites (2022)
Journal Article
Hall, Z. E., Liu, J., Brooks, R. A., Liu, H., Crocker, J. W., Joesbury, A. M., …Dear, J. P. (2022). The effectiveness of patch repairs to restore the impact properties of carbon-fibre reinforced-plastic composites. Engineering Fracture Mechanics, 270, Article 108570. https://doi.org/10.1016/j.engfracmech.2022.108570

The present paper studies the low-velocity impact testing of carbon-fibre reinforced-plastic (CFRP) pristine and patch-repair CFRP panels. Firstly, the effect of repeated impacts on the pristine CFRP damage growth is considered at impact energies of... Read More about The effectiveness of patch repairs to restore the impact properties of carbon-fibre reinforced-plastic composites.

Design guidelines for hybrid continuous/discontinuous carbon fibre laminates (2022)
Journal Article
Evans, A. D., Turner, T. A., Harper, L. T., & Warrior, N. A. (2022). Design guidelines for hybrid continuous/discontinuous carbon fibre laminates. Journal of Composite Materials, 56(10), 1513-1527. https://doi.org/10.1177/00219983221078786

Combining discontinuous carbon fibre moulding compounds with unidirectional (UD) non-crimp fabric has been studied as a potential solution for producing cost effective composite structures, with short cycle times via compression moulding. The tensile... Read More about Design guidelines for hybrid continuous/discontinuous carbon fibre laminates.

Optimisation of intra-ply stitch removal for improved formability of biaxial non-crimp fabrics (2021)
Journal Article
Chen, S., Joesbury, A. M., Yu, F., Harper, L. T., & Warrior, N. A. (2022). Optimisation of intra-ply stitch removal for improved formability of biaxial non-crimp fabrics. Composites Part B: Engineering, 229, Article 109464. https://doi.org/10.1016/j.compositesb.2021.109464

Automated fabric forming solutions are required to meet the demand of liquid moulding processes, but wrinkling is a common problem for double-curvature parts due to a combination of the reinforcement type, manufacturing parameters and the part geomet... Read More about Optimisation of intra-ply stitch removal for improved formability of biaxial non-crimp fabrics.

Investigation into the effects of inter-ply sliding during double diaphragm forming for multi-layered biaxial non-crimp fabrics (2021)
Journal Article
Yu, F., Chen, S., Harper, L. T., & Warrior, N. A. (2021). Investigation into the effects of inter-ply sliding during double diaphragm forming for multi-layered biaxial non-crimp fabrics. Composites Part A: Applied Science and Manufacturing, 150, Article 106611. https://doi.org/10.1016/j.compositesa.2021.106611

The effect of inter-ply sliding was investigated for multi-ply Non-Crimp Fabric (NCF) preforms during the Double Diaphragm Forming (DDF) process. A Finite Element (FE) model was employed to investigate the influence of the ply layup sequence and the... Read More about Investigation into the effects of inter-ply sliding during double diaphragm forming for multi-layered biaxial non-crimp fabrics.

Double diaphragm forming simulation using a global-to-local modelling strategy for detailed defect detection in large structures (2021)
Journal Article
Yu, F., Chen, S., Harper, L., & Warrior, N. (2021). Double diaphragm forming simulation using a global-to-local modelling strategy for detailed defect detection in large structures. Composites Part A: Applied Science and Manufacturing, 147, Article 106457. https://doi.org/10.1016/j.compositesa.2021.106457

A global-to-local modelling strategy is presented based on a sub-modelling approach to predict the formation of macroscale defects in bi-axial non-crimp fabric (NCF) during double diaphragm forming (DDF). A full-scale global simulation is initially p... Read More about Double diaphragm forming simulation using a global-to-local modelling strategy for detailed defect detection in large structures.

Simulating the effect of fabric bending stiffness on the wrinkling behaviour of biaxial fabrics during preforming (2021)
Journal Article
Yu, F., Chen, S., Harper, L., & Warrior, N. (2021). Simulating the effect of fabric bending stiffness on the wrinkling behaviour of biaxial fabrics during preforming. Composites Part A: Applied Science and Manufacturing, 143, Article 106308. https://doi.org/10.1016/j.compositesa.2021.106308

A macroscopic finite element model has been established to investigate the forming-induced wrinkling behaviour for bi-axial fabrics. Results indicate that using a linear bending model with a constant bending stiffness produces unrealistic wrinkle pat... Read More about Simulating the effect of fabric bending stiffness on the wrinkling behaviour of biaxial fabrics during preforming.

Solid epoxy resin systems for automated composite manufacturing (2020)
Journal Article
Yousefi, N., Evans, A. D., Harper, L. T., Maples, H. A., James, T., & Bismarck, A. (2021). Solid epoxy resin systems for automated composite manufacturing. Composites Part A: Applied Science and Manufacturing, 142, Article 106205. https://doi.org/10.1016/j.compositesa.2020.106205

© 2020 The Author(s) Thermosetting resins were formulated by mixing solid epoxy components, hardener and accelerator at elevated temperature. These mixtures were ground into uncured, solid resin powders and dispensed onto carbon fibres using a powder... Read More about Solid epoxy resin systems for automated composite manufacturing.