Outputs (45)

Joule heating of carbon fibre tapes – A low-cost approach for automated dry fibre deposition (2024)
Journal Article
Lu, S., Song, P., Harper, L., & Turner, T. (2024). Joule heating of carbon fibre tapes – A low-cost approach for automated dry fibre deposition. Composites Part A: Applied Science and Manufacturing, 187, Article 108498. https://doi.org/10.1016/j.compositesa.2024.108498

Joule heating is potentially a low-cost option for activating the binder on the surface of carbon fibre tapes during automated dry fibre placement (ADFP). In this paper, the electrical contact resistance between a carbon fibre tape and cylindrical el... Read More about Joule heating of carbon fibre tapes – A low-cost approach for automated dry fibre deposition.

Poly-Ether-Ether-Ketone (PEEK) Biomaterials and Composites: Challenges, Progress, and Opportunities (2024)
Journal Article
Molinar-Díaz, J., Parsons, A. J., Ahmed, I., Warrior, N. A., & Harper, L. T. (2024). Poly-Ether-Ether-Ketone (PEEK) Biomaterials and Composites: Challenges, Progress, and Opportunities. Polymer Reviews, 1-39. https://doi.org/10.1080/15583724.2024.2406965

Polyetheretherketone (PEEK) is a lightweight, bioinert, high-performance thermoplastic that is beginning to see clinical use in orthopedic applications. PEEK outperforms conventional metallic counterparts in terms of reduced stress shielding and impr... Read More about Poly-Ether-Ether-Ketone (PEEK) Biomaterials and Composites: Challenges, Progress, and Opportunities.

Laser cutting of CFRP using novel cutting strategies (2024)
Journal Article
Kelsey, D., Elkington, H., Jackson-Crisp, A., Harper, L., Marithmu, S., & Voisey, K. (2024). Laser cutting of CFRP using novel cutting strategies. Procedia CIRP, 124, 509-512. https://doi.org/10.1016/j.procir.2024.08.163

Laser cutting of carbon fibre reinforced plastics generates a heat affected zone (HAZ) in the vicinity of the cut, affecting the integrity of the material and therefore the uptake of laser cutting for composite applications. This w... Read More about Laser cutting of CFRP using novel cutting strategies.

An analytical model for wrinkle-free forming of composite laminates (2024)
Journal Article
Trenam, A., Aza, C., Jones, C., Lawrence, G., Harper, L., Rhead, A., Loukaides, E. G., & Butler, R. (2024). An analytical model for wrinkle-free forming of composite laminates. Composites Part A: Applied Science and Manufacturing, 186, Article 108386. https://doi.org/10.1016/j.compositesa.2024.108386

Double Diaphragm Forming (DDF) of 3D shapes significantly increases production rates for laminated composite parts when compared with Automated Fibre Placement. However, it is prone to the occurrence of wrinkling defects, which can lead either to con... Read More about An analytical model for wrinkle-free forming of composite laminates.

Characterisation of process-induced variability in wrinkle defects during double diaphragm forming of non-crimp fabric (2024)
Journal Article
Codolini, A., Chen, S., Lawrence, G., Harper, L., & Sutcliffe, M. (2024). Characterisation of process-induced variability in wrinkle defects during double diaphragm forming of non-crimp fabric. Composites Part B: Engineering, 281, Article 111549. https://doi.org/10.1016/j.compositesb.2024.111549

Experiments and numerical simulations are employed to determine the critical process variables that affect the quality of a two-layer biaxial non-crimp fabric (NCF) preformed using the double diaphragm forming (DDF) process. To prevent wrinkling defe... Read More about Characterisation of process-induced variability in wrinkle defects during double diaphragm forming of non-crimp fabric.

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. A., Liu, J., Hall, Z. E., Joesbury, A. M., Harper, L. T., Liu, H., Kinloch, A. J., & Dear, J. P. (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, 31, 1869-1888. 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.

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.

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.

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.