EXPERIMENTAL INVESTIGATION OF SURFACE DAMAGE OCCURRED ON THE SIDES OF HOLE ENTRANCE IN DRILLING OF GLASS-FIBER REINFORCED POLYMER COMPOSITE MATERIALS


EKİCİ E. , IŞIK B.

Engineering Science and Technology, an International Journal, vol.13, pp.31-40, 2010 (National Refreed University Journal)

  • Publication Type: Article / Article
  • Volume: 13
  • Publication Date: 2010
  • Title of Journal : Engineering Science and Technology, an International Journal
  • Page Numbers: pp.31-40

Abstract

Glass-fiber reinforced polymer composite (GFRP) materials have been started to get extensively used at the industry of space, aviation, ship, chemistry and automotive nowadays. Although GFRPs are generally fabricated to near-set-shape, there often is a need to conduct some additional machining operations. Drilling of composite materials is a very common and an additional machining operations used in industry to perform the assembly of composite metarials. However, drilling of composite materials present a number of problems such as delamination associated with the characteristic of the material. In this study, during the process of drilling, because of the high tensile forces surface damage occurred on the sides of hole entrance has been examined. During the investigation, the glass fiber reinforced polymer composite materials have been drilled under the different cutting parameters such as cutting speed, feed, and tool point geometry, and measuring the damage factors at hole entrance have been carried out. Explaining the results, suggestions have been mentioned about the optimum cutting parameters which requires to get preferred for less damage of surface