Fracture behaviour of bamboo fiber reinforced epoxy composites

Khan, Ziaullah and Yousif, B. F. and Islam, Mainul (2017) Fracture behaviour of bamboo fiber reinforced epoxy composites. Composites Part B: Engineering, 116. pp. 186-199. ISSN 1359-8368

Abstract

In this work, experimental and numerical study on fracture behaviour of bamboo fiber reinforced epoxy composites is presented. Optimum NaOH concentration for treatment of bamboo fibers was determined through single fiber tensile test and microscopic inspection of fiber surface through SEM (Scanning Electron Microscopy). The results demonstrated that 6% NaOH treated fibers showed maximum ultimate tensile strength of 234 MPa. Single fiber fragmentation test results showed that interfacial adhesion is improved by treating fibers with 6% NaOH. Bamboo fiber reinforced epoxy composite was fabricated using 6% NaOH treated bamboo fibers of length 10 mm, 20 mm and 25 mm with random distribution in epoxy matrix. Mode-I plane strain fracture toughness (KIC) of bamboo fiber reinforced epoxy composites was investigated based on Linear Elastic Fracture Mechanics (LEFM) approach as per ASTM D5045. Results showed that composites having 25 mm length of fibers had the largest KIC value of 2.67 MPa.m1/2, whereas composites with 10 mm fiber length showed lowest value of fracture toughness KIC of 1.61 MPa.m1/2. SEM results revealed that fiber breakage, matrix cracking, fiber matrix debonding and fiber pull out are major causes of failure of composite. Simulation/modelling of crack propagation in CT (Compact Tension) specimen by using FEA software ABAQUS®


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version, in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 21 Sep 2018 02:44
Last Modified: 28 Sep 2018 02:46
Uncontrolled Keywords: Mode-I plane strain fracture toughness (KIC); fracture mechanics; bamboo fibers; epoxy matrix
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030307 Theory and Design of Materials
12 Built Environment and Design > 1204 Engineering Design > 120499 Engineering Design not elsewhere classified
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
09 Engineering > 0907 Environmental Engineering > 090701 Environmental Engineering Design
Identification Number or DOI: 10.1016/j.compositesb.2017.02.015
URI: http://eprints.usq.edu.au/id/eprint/34831

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