Effects of Different Parameters on Delamination Factor of Glass Fiber Reinforced Plastic (GFRP)

Effects of Different Parameters on Delamination Factor of Glass Fiber Reinforced Plastic (GFRP)

Vikas Sharma (Department of Mechanical Engineering, Haryana Institute of Engineering and Technology, Bahdurgarh, India), Vinod Kumar (Mechanical Engineering Department, Thapar University, Patiala, Punjab, India) and Harmesh Kumar (Department of Mechanical Engineering, UIET, Panjab University, Chandigarh, Punjab, India)
DOI: 10.4018/ijmmme.2013040102
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Abstract

The experimental investigations of the delamination factor of glass fiber reinforced plastic at different cutting parameters are reported in this study. This paper has involved the determination of different factors affecting the hole quality and cause of delamination in a glass fiber reinforced plastic. The various process parameters like different twist drill bits of different materails, different point angle at different speed, feed rate have been taken. The thrust forces and torque values were measured using piezoelectric dynamometer. Mathematical model has been developed for different machining conditions using Minitab software with help of Taguchi design to plan the experiments. The Universal microscope has been used which determines delaminated diameter in GFRP specimens. The finite element method has been applied by using Ansys11.0 software which helped to find out delaminated diameter. It was experimentally observed that for the tungsten carbide and M50 drill bits, the thrust force and torque significant increases on increasing the point angle and feed rate.
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Introduction

Composite materials are basically hybrid materials formed of multiple materials in order to utilize their individual structural advantages in a single structural material. A composite material is a heterogeneous material created by the synthetic assembly of two or more components, one a selected filler of reinforcing material and the other a compatible matrix binder, in order to obtain specific characteristics and performance.

In a glass fiber reinforced composite structures, the glass fibers carry the bulk load and the matrix serves as a medium for the transfer of the load. It becomes very important to study about drilling in case of composite materials. Different tools and methods are used for drilling depending on the type of material, the size of the hole, the number of holes, and the time to complete the operation. Poor surface finish and faster tool wear led to the further study of composite machining. Unlike metals, composites need separate tools and working conditions. A number of research endeavors have been made in the recent past to fully characterize the drilling process for FRP composite materials. The efforts have been made in the direction of optimization of the operating variables and conditions for minimizing the drilling induced damage around the hole.

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