Title: Analysis of delamination in drilling composite materials by core-saw drill

Authors: C.C. Tsao, H. Hocheng

Addresses: Department of Automation Engineering, Ta Hua Institute of Technology, Hsinchu, 30740 Taiwan, ROC. ' Department of Power Mechanical Engineering, National Tsinghua University, Hsinchu, 30013 Taiwan, ROC

Abstract: Machining of fibre reinforced plastic is a process that is substantially different from metals. Drilling is one of the long practiced methods for generating holes for riveting and fastening structural assemblies. The size of the delamination zone has been shown to be related to the thrust force developed during drilling and there is a critical thrust force below which no damage occurs. The critical thrust force at the onset of delamination is predicted and compared with the twist drill, core drill and saw drill. Based on the proposed model, an innovative drill can be developed for industry.

Keywords: core drills; saw drills; core-saw drills; delamination; thrust force; fibre reinforced plastic; FRP composites; drilling composites; thrust force; twist drills.

DOI: 10.1504/IJMPT.2008.018980

International Journal of Materials and Product Technology, 2008 Vol.32 No.2/3, pp.188 - 201

Available online: 27 Jun 2008

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