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

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture - Tập 225 Số 7 - Trang 1217-1223 - 2011
Islam Shyha1, Sein Leung Soo1, D.K. Aspinwall1, Steven W. Bradley2
1Machining Research Group, School of Mechanical Engineering, University of Birmingham, Birmingham, UK
2Composite Research Centre, GKN Aerospace, Isle of Wight, UK

Tóm tắt

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.

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

Tập 225 Số 7

1217-1223

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