The effect of peel ply layer on hole integrity when drilling
carbon fibre-reinforced plastic

Islam Shyha; Sein Leung Soo; David Aspinwall; Sam Bradley

doi:10.1177/2041297510393797

The effect of peel ply layer on hole integrity when drilling carbon fibre-reinforced plastic

Islam Shyha, Sein Leung Soo, David Aspinwall, Sam Bradley

Mechanical and Construction Engineering

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

Fibre/matrix delamination is a common problem when cutting carbon fibre-reinforced plastic (CFRP) that can have a detrimental effect on workpiece mechanical properties and hence compromise the in-service performance of the composite part. The present paper details experimental results when drilling small holes (1.5 mm diameter) through backed and un-backed CFRP laminates using tungsten carbide twist drills to determine the effect of peel ply layers (∼100 µm thick nylon sheet attached on both sides of 3 mm thick laminates) on hole entry and exit delamination. Considerable reduction in damage relating to fuzzing, spalling, edge chipping, and delamination was observed when drilling the nylon-backed CFRP material, with scanning electron micrographs showing significantly inferior hole quality for the corresponding un-backed workpieces, particularly at hole exit.

Original language	English
Pages (from-to)	1217-1223
Journal	Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture
Volume	225
Issue number	7
DOIs	https://doi.org/10.1177/2041297510393797
Publication status	Published - Jul 2011

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title = "The effect of peel ply layer on hole integrity when drilling carbon fibre-reinforced plastic",

abstract = "Fibre/matrix delamination is a common problem when cutting carbon fibre-reinforced plastic (CFRP) that can have a detrimental effect on workpiece mechanical properties and hence compromise the in-service performance of the composite part. The present paper details experimental results when drilling small holes (1.5 mm diameter) through backed and un-backed CFRP laminates using tungsten carbide twist drills to determine the effect of peel ply layers (∼100 µm thick nylon sheet attached on both sides of 3 mm thick laminates) on hole entry and exit delamination. Considerable reduction in damage relating to fuzzing, spalling, edge chipping, and delamination was observed when drilling the nylon-backed CFRP material, with scanning electron micrographs showing significantly inferior hole quality for the corresponding un-backed workpieces, particularly at hole exit.",

keywords = "drilling, composites, carbon fibre-reinforced plastic, delamination",

author = "Islam Shyha and Soo, {Sein Leung} and David Aspinwall and Sam Bradley",

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T1 - The effect of peel ply layer on hole integrity when drilling carbon fibre-reinforced plastic

AU - Shyha, Islam

AU - Soo, Sein Leung

AU - Aspinwall, David

AU - Bradley, Sam

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N2 - Fibre/matrix delamination is a common problem when cutting carbon fibre-reinforced plastic (CFRP) that can have a detrimental effect on workpiece mechanical properties and hence compromise the in-service performance of the composite part. The present paper details experimental results when drilling small holes (1.5 mm diameter) through backed and un-backed CFRP laminates using tungsten carbide twist drills to determine the effect of peel ply layers (∼100 µm thick nylon sheet attached on both sides of 3 mm thick laminates) on hole entry and exit delamination. Considerable reduction in damage relating to fuzzing, spalling, edge chipping, and delamination was observed when drilling the nylon-backed CFRP material, with scanning electron micrographs showing significantly inferior hole quality for the corresponding un-backed workpieces, particularly at hole exit.

AB - Fibre/matrix delamination is a common problem when cutting carbon fibre-reinforced plastic (CFRP) that can have a detrimental effect on workpiece mechanical properties and hence compromise the in-service performance of the composite part. The present paper details experimental results when drilling small holes (1.5 mm diameter) through backed and un-backed CFRP laminates using tungsten carbide twist drills to determine the effect of peel ply layers (∼100 µm thick nylon sheet attached on both sides of 3 mm thick laminates) on hole entry and exit delamination. Considerable reduction in damage relating to fuzzing, spalling, edge chipping, and delamination was observed when drilling the nylon-backed CFRP material, with scanning electron micrographs showing significantly inferior hole quality for the corresponding un-backed workpieces, particularly at hole exit.

KW - drilling

KW - composites

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KW - delamination

U2 - 10.1177/2041297510393797

DO - 10.1177/2041297510393797

M3 - Article

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JO - Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture

JF - Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture

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