Validation of low velocity impact on a biocomposite flat plate laminates
Impact analysis under low velocity was carried out on flat plate structure at normal and oblique impact with energy level of 3J to 9J with interval of 3J. Utilization of natural fiber reinforced with polymer and hybridizing it with synthetic fiber were introduced. The aim of the study was to asse...
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| Format: | Thesis |
| Language: | English |
| Published: |
2016
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/67067/1/FK%202016%20175%20IR.pdf |
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| Summary: | Impact analysis under low velocity was carried out on flat plate structure at
normal and oblique impact with energy level of 3J to 9J with interval of 3J.
Utilization of natural fiber reinforced with polymer and hybridizing it with synthetic
fiber were introduced. The aim of the study was to assess the effects of low
velocity impact on biocomposite structure composed of chopped strand mat
(CSM) glass fiber, kenaf fiber and hybrid of both materials and epoxy as resin
material. Drop weight impact test of flat plate structure and determination of
mechanical characterization were carried out with samples prepared under
vacuum infusion method for glass/epoxy, kenaf/epoxy and hybrid composites
composed of those two material. Glass/epoxy composites exhibit better
mechanical properties as compared to kenaf/epoxy composites. From the
experimental work, it was found that the impact energy level influenced the
impact peak force proportionately. Hybrid composites generates damage
propagation with combination of damage propagation from individual fiber of
glass and kenaf reinforced polymer. The severity of damage was high at higher
impact energy although significant damage at impact energy of 3J was detected
under drop weight impact test where internal damage on all three configurations
had occurred which further suggested reduction in residual strength. Finite
element analysis was then carried out for flat plate model of all three
configurations and validated against the experimental work. It was found that
validation on all configurations meet the agreement with experimental results.
Further finite element analysis considered all configuration based on the
validation results for flat plate on oblique impact. The influence of impact angle
was found to affect the maximum impact force of the impacted material where at
higher impact energy the respond of maximum impact force was significant.
However, there is slightly impact damage detected at lower impact energies
under oblique impact. |
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