Abstract
Functionally graded composite (FGC) materials are categorized as advanced materials that display different thermal and mechanical responses compared with well-known composites, such as carbon fiber or glass fiber-reinforced composites. This paper presents the experimental results for the drilling of three materials, namely glass/epoxy, carbon/epoxy, and FGC material. FGC was compared with carbon and glass/epoxy composites in terms of thrust force, delamination factor, diameter of hole, and roundness during drilling. This study illustrated that the drilling performance of FGC is considerably more complicated than that of more common composite materials, such as glass/epoxy and carbon/epoxy. Delamination factor at the exit of hole during drilling of FGC was mainly affected by the material placed at the exit of the hole. The proposed cutting parameters and drill geometries to minimize the occurrence of delamination during drilling of carbon/epoxy and glass/epoxy apparently does not meet the expectation in drilling FGC.
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Ugur Köklü graduated from Dumlupinar University, Turkey, in 2001. He received his M.S. degree from Dumlupinar University in 2005 and his Ph.D. degree from Marmara University in 2010. Dr. Köklü is currently an Associate Professor at the Engineering Faculty at Karamanoglu Mehmetbey University in Karaman, Turkey. His research interest includes machining.
Okan Demir received his Ph.D. in mechanical engineering from Selcuk University, Turkey. His current research areas are fiber-reinforced polymer composites, hybrid composites, and nanocomposites.
Ahmet Avcı received his Ph.D. from Selcuk University (SU), Turkey and is currently Professor at the Department of Mechanical Engineering in SU. His research areas include nanocomposites, fracture mechanics, and fatigue of structures.
Ayhan Etyemez was born in October 1971 in Turkey. He received B.S., M.S. and Ph.D. from the Mechanical Department of Marmara University, Turkey, in 1993, 1996, and 2003, respectively. His research interest includes metal cutting.
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Köklü, U., Demir, O., Avcı, A. et al. Drilling performance of functionally graded composite: Comparison with glass and carbon/epoxy composites. J Mech Sci Technol 31, 4703–4709 (2017). https://doi.org/10.1007/s12206-017-0916-4
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DOI: https://doi.org/10.1007/s12206-017-0916-4