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https://ptsldigital.ukm.my/jspui/handle/123456789/486929Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Che Husna Azhari, Prof. Dr. | - |
| dc.contributor.author | Ude Albert Uchenna (P37166) | - |
| dc.date.accessioned | 2023-10-11T02:26:39Z | - |
| dc.date.available | 2023-10-11T02:26:39Z | - |
| dc.date.issued | 2011-07-27 | - |
| dc.identifier.other | ukmvital:114733 | - |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/486929 | - |
| dc.description | Natural fibres composites are aimed to replace or serve as an alternative to their synthetic counterparts since they posses great qualities; cheap in terms of cost, environmental friendly and constitute no health hazard when being processed into composite materials. However, their behaviour under foreign object impact is of great concern, since all structures under applications will inevitably be subjected to impact. Impact-induced damage can significantly reduce the strength of any composite structure leading to a catastrophic failure. It is then important to investigate the response of woven natural silk fibres composite in an impact event. This research then focussed on the impact energy attenuation and damage characteristics of woven natural silk (WNS)/Epoxy laminated composite panels for light weight vehicles (LWV). The samples were prepared in two sets; the first samples were prepared in configurations of sandwich WNS/Epoxy/Honeycomb, WNS/Epoxy/Coremat, WNS/Epoxy/Foam and reinforced WNS/Epoxy (reference sample). The thickness of each sandwich samples was 7mm while that of the reference material was 3mm. The second samples were prepared as reinforced WNS/Epoxy in configurations of 10, 15, 20, 25 and 30 WNS ply. The laminated panels were subjected to low velocity impact loading at energy levels of 32J, 48J and 64J respectively. The impact parameters measured were load-deflection behaviour, load-time behaviour and absorbed energy-time behaviour for evaluating the impact performance in terms of load bearing capabilities, energy absorption and failure modes. Evaluation of the first samples results showed that WNS/Epoxy/Coremat had better load bearing capability qualities compared to other configurations. In terms of energy, the energy absorption decreases as impact energy increases in all composite samples. Findings also show WNS/Epoxy/Foam as better energy absorber when compared to other configuration samples. The damage areas increased with increasing energy while time to response decreased in all configurations. The morphologies of failure were examined using the scanning electron microscope. The micrographs show mode of failures as matrix crack, delamination and fibre breakage. The results of the second sets of samples revealed generally that as the number of plies increase, the better the absorption of energy and the load bearing capabilities. The sample configuration with 30 plies of WNS confirmed this observation by demonstrating higher values in terms of energy absorption and load bearing capabilities compared to others. The data obtained from the experiments formed the bases of fabrication and were configured in the fabrication of a full size light weight vehicle body (LWV) in form of a solar car body. The design considerations of the car body were; aerodynamic, minimization of drag force, maximum exposure to the sun and light weight. The aerodynamic effect on the body was performed using COMSOL software and the streamlines of the simulation were attached to the body. The total length of the car body was 3962mm and the height was 613mm. Hand lay-up method was employed to laminate the woven natural silk on the mould core of the car body which was milled out of a polyurethane foam core.,"Certification of Master's/Doctoral Thesis" is not available,Ph.D. | - |
| dc.language.iso | eng | - |
| dc.publisher | UKM, Bangi | - |
| dc.relation | Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina | - |
| dc.rights | UKM | - |
| dc.subject | Laminated materials | - |
| dc.subject | Composite materials | - |
| dc.subject | Plates (Engineering) | - |
| dc.subject | Universiti Kebangsaan Malaysia -- Dissertations | - |
| dc.subject | Dissertations, Academic -- Malaysia | - |
| dc.title | Development of woven natural silk laminate composite plates for light weight vehicle | - |
| dc.type | Theses | - |
| dc.format.pages | 240 | - |
| dc.identifier.callno | TA418.9.L3U275 2011 3 tesis | - |
| dc.identifier.barcode | 002405(2011) | - |
| Appears in Collections: | Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_114733+SOURCE1+SOURCE1.0.PDF Restricted Access | 15.23 MB | Adobe PDF |  View/Open |
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