Fiber Misalignment Effect On Compressive Properties Of Jute And Kevlar Composite Under Impact And Static Loading
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Date
2022-07-23
Authors
Lim, Kwan Hue
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
These days, composite materials are frequently used. Due to its low cost, great
strength, and light weight, it has a wide range of uses. However, fiber
misalignment problem always inevitable during manufacture and might affects fiber
its compressive strength. Weaved fibres aim to address the issue of the extremely
anisotropic behaviour of unidirectional composites. Therefore, this research is to
investigate the fiber misalignment effect on compressive properties of jute and
kevlar composite under impact loading with 1.0 bar, 1.25 bar and 1.5 bar using split
hopkinson pressure bar (SHPB). Besides, static loading testing is done using
ultimate tensile machine (UTM) with about 0.08mm/s to study its compressive
properties. The support of using scanning electron microscope (SEM), high speed
camera (HSC) and camera phone is to figure the failure mechanism of jute and
kevlar specimen under dissimilar parameters. The results demonstrate the failure
stress and strain of the jute composite fall by 10.1% and 2.11%, respectively, as
impact loading. Under static loading, the failure stress and strain are successively
lowered by 12.5% and 19.5%. In all different pressure bars of impact testing, the
kevlar composite shows an increase in failure stress of 129.1% from 0° to 4° and a
notable increase in failure strain of 533.3%. The failure stress and failure strain of
kevlar composite increased significantly by 252.4% but dropping by 3.9% under
static loading.