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Effects of Drilling Induced Defects and Mechanical Properties of GFRE Composites

Khairul Ashraf Bin Minhat, Khairul Ashraf (2012) Effects of Drilling Induced Defects and Mechanical Properties of GFRE Composites. Universiti Teknologi Petronas. (Unpublished)

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Abstract

Glass fiber reinforced epoxy composites become highly demanded on the way to producing parts in various industry uses for example in aerospace and oil and gas fields. Drilling of fiber composites is one type of machining that mostly applied for assembly uses and it can be problematic especially at the drilled holes. Damages occurred at the drilled holes could lead to adverse impact on its functions. The condition of fiber composite which is in homogeneity of the materials per part is one main cause that makes drilling of fiber composite becoming troubles. In this study, GFRE composite was developed using wet hand lay-up technique with 40% fiber volume fraction of woven glass fiber. 9 samples were prepared with geometry from standard ASTM D3039 was referred and each sample was tested by different parameters. Parameters studied are narrowed to focus on the feed rate (0.05 mm/rev, 0.1 mm/rev, and 0.2 mm/rev) and spindle speed (1000, 2000 and 3000 rpm) of drilling process using 10 mm HSS drill bit for each cutting parameter on MTAB Denford CNC Milling Trainer XLMILL machine. Drilled samples were analyzed on its holes in term of damage factor using 3D Noncontact Measuring Machine where delamination of plies ratio with drill bit diameter around the drilled holes was measured. Tensile strength of drilled samples were also been obtained in this study by using Universal Testing Machine and 100 kN of load was applied to find the correlation between damage factor to the tensile strength of each samples. Best result for damage factor was obtained on sample F (0.1mm/rev, 3000 rpm) and it also showed highest tensile strength rather than others. From the results obtained, it can be related that increasing of damage factor will lead to minimal value of tensile strength.

Item Type: Final Year Project
Academic Subject : Academic Department - Mechanical Engineering - Materials - Engineering materials - Metals alloys - Phase transformation
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Users 2053 not found.
Date Deposited: 17 Jan 2013 15:19
Last Modified: 25 Jan 2017 09:40
URI: http://utpedia.utp.edu.my/id/eprint/5525

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