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Monotonic properties of unidirectional glass fiber (U)/random glass fiber (R)/epoxy hybrid composites
Faculty
Science
Year:
2011
Type of Publication:
Article
Pages:
743-749
Authors:
Selmy, A. I, Azab, N. A, Elsesi, A. R, El-Baky, M. A. Abd
DOI:
10.1016/j.matdes.2010.07.031
Journal:
MATERIALS \& DESIGN ELSEVIER SCI LTD
Volume:
32
Research Area:
Materials Science
ISSN
ISI:000284788300033
Keywords :
Hybrid composite, Laminates, Mechanical properties
Abstract:
The main objective of the present paper is to study the tensile and bending behaviors of unidirectional glass fiber (U)/random glass fiber (R)/epoxy hybrid composites with total fiber volume fraction (V(fT)) = 37\%. Six kinds of laminated composites of average thickness 5.5 mm were manufactured using hand lay-up technique: i.e. {[}R](5), {[}U/R/U/R/U], {[}U/0.5R/U](s), {[}0.5R/U/U](s), {[}U/U/0.5R](s), and {[}U](5). In bending test, notched and unnotched specimens were tested. For this purpose different circular notch sizes (D = 3, 6, 9 mm) were drilled at the specimen center. Tensile strength, tensile modulus. Poisson's ratio, bending strength and bending modulus were determined experimentally. The effect of stacking sequences, random fiber relative volume fraction (V(fR)/V(fT)), and notch diameter on the mechanical properties of the mentioned composite types were studied. Failure modes of all specimens were investigated. (C) 2010 Elsevier Ltd. All rights reserved.
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