Low velocity impact characterisations of flax/kenaf/glass fibre hybrid composites
Kenaf is widely used in Malaysia. Flax was hybridized with kenaf to improve the kenaf composites properties. Glass fibre has been chosen to hybrid with flax/kenaf composites to study their impact damage behaviour. All specimens were fabricated using hand lay-up technique. Flax/kenaf specimens wer...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2021
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/92673/1/FK%202021%202%20-%20IR.pdf |
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| Summary: | Kenaf is widely used in Malaysia. Flax was hybridized with kenaf to improve the
kenaf composites properties. Glass fibre has been chosen to hybrid with
flax/kenaf composites to study their impact damage behaviour. All specimens
were fabricated using hand lay-up technique. Flax/kenaf specimens were used
for physical, mechanical and thermal test. The result shows that the mechanical
properties are improve when the hybrid specimen was used as test specimens.
From the entire test, hybrid composites of flax BL150 fibre and kenaf fibre show
the highest tensile and flexural properties for each test. The thermal properties
will be increased when the hybrid specimen was used as test specimens. From
the results achieved, the best kenaf/flax composites were selected to hybrid with
glass fibre for low velocity impact test. The motivation for this work is to identify
the low velocity impact damage by changes in the type of materials and impact
energy level. Different energy levels used were 15J, 30J, 45J, 60J, 75J and 90J.
The impact energy absorption, penetration behaviour, composites failure and
impact force were discussed. The specimen was attached to acoustic emission
sensor while doing the impact test. The correlation between the impacted
specimens and types of materials was discussed. A general trend was observed
which indicates that as height increase, the energy absorbed also increases.
Impact damage was found to be in the form of fibre cracking, fibre breakage and
matrix cracking. Results from this research can be used as a reference in
designing the structure of aircraft applications and in developing a better
understanding of the test methods used to characterise impact behaviour. The
research later was end up with the result from post impact. |
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