Örgü yapılı sürekli karbon fiber takviyeli polimer kompozitin katı partikül erozyonu

HİLAL BIKMAZ

Örgü yapılı sürekli karbon fiber takviyeli polimer kompozitin katı partikül erozyonu

Thesis Type: Postgraduate

Institution Of The Thesis: Kocaeli University, Fen Bilimleri Enstitüsü, Makina Mühendisliği Bölümü, Turkey

Approval Date: 2019

Thesis Language: Turkish

Student: HİLAL BIKMAZ

Supervisor: Tamer Sınmazçelik

Open Archive Collection: AVESIS Open Access Collection

Abstract:

The carbon fibres have a unique combination of outstanding properties such as mechanical, pyhsical and chemical properties. While they exhibit high strength and stiffness, high modulus values, high resistance to corrosion, they have lower density compared to universal materials. Due to their outstanding properties the carbon fibre reinforced polymeric composite materials are exposed to solid particle erosion especially in aviation and aerospace applications. The solid particle erosion causes severe damage of workpieces and economic life of workpiece become much more shorter. In this study solid particle erosion behavior of carbon fibre reinforced epoxy composite materials were investigated. The samples were tested in universal particle erosion wear test machine. Effect of particle impact angles (15°, 30°, 45°, 60°, 75° and 90°), orientation of carbon fibres ( 0/90 and +45/-45 ) were examined by using 120 mesh, 80 mesh and 60 mesh alumina erodent particles. The erosion rates of samples were calculated depending on the erosion parameters. The erosion rates have varied dramatically depending on particle impingement angle, orientation of carbon fibres and erodent particle size. The maximum erosion rates were observed at 60° impingement angles at all orientation of carbon fibres and particle sizes. Surfaces 2D and 3D images of eroded samples were examined by using an optical profilometer. The eroded surfaces morphology of the samples were analyzed by using stereo microscope. Microcutting and microploughing erosion mechanisms were observed at 15° particle impingement angle, while deep cavities formed due to plastic deformation were observed at 60° particle impingement angle.