000 04966ntm a2200373 i 4500
001 vtls000105328
003 KUKTEM
005 20251117113406.0
008 180927t20182018my a f a m 001 0 eng d
020 _aTHE0005286(Local)
039 9 _a201905151025
_bhanafiah
_y201809271511
_zfateeha
040 _aUMP
_beng
_cUMP
_erda
090 _aFKM .Z34 2018 r Thesis
100 0 _aZahidah Ansari,
_eauthor.
245 1 0 _aSandwich square honeycomb structure from biodegradable and recyclable composites /
_cZahidah Ansari
264 1 _aKuantan, Pahang :
_bUMP,
_c2018
264 4 _c© 2018
300 _axv, 102 pages :
_billustrations (some color), charts ;
_c30 cm. +
_e1 CD-ROM
336 _atext
_2rdacontent
336 _atext
_2rdacontent
337 _aunmediated
_2rdamedia
337 _acomputer
_2rdamedia
338 _avolume
_2rdacarrier
338 _acomputer disc
_2rdacarrier
347 _atext file
_bPDF
_2rda
500 _aFaculty of Mechanical Engineering
502 _aThesis (Master of Science) -- University Malaysia Pahang – 2018
504 _aIncludes bibliographical references
520 3 _aIncreasing environment concern has triggered the development of natural fibre composite, especially in a honeycomb structure due to its lightweight properties. A honeycomb structure is usually used in aerospace, automotive and recently in furniture industries as it is a good weight saving option. However, only a small number of natural fibre composites have been studied as a honeycomb structure. Besides that, the prospect of recycling the natural fibre composite into a new product has yet to be discussed in any previous research. This research aims to investigate the mechanical properties of the sandwich square honeycomb structure made out of three types of fibre, which are kenaf, pineapple and sugar palm fibre reinforced with polylactic acid (PLA). Apart from that, the objectives of this study are to study the compression behaviour, the scaling effect and the finite element analysis of the sandwich square honeycomb structure. Furthermore, this research also investigates the effect of recycling the natural fibre composite in term of its strength and energy absorption values. This study was conducted on natural fibre composites made from mixing PLA with three different types of natural fibres; kenaf, sugar palm and pineapple leave fibres. The long fibres were crushed and sieved into short fibres to ensure uniformity throughout the process including recycling. Then fibres and PLA were mixed using a batch mixer at 180ºC before being crushed into small pallets for the hot press moulding. Hot pressing the pallets in a designated mould for 5 minutes at 180 º C and 60 tonnes of pressure produced plates of each fibre with a thickness of 3 mm. Later on, the plate underwent tensile test and the sandwich square honeycomb structure fabricated from the plate underwent a compression test. The end products were then recycled into plates by the same process of crushing into pallets, hot pressing and fabrication into sandwich square honeycomb structure without adding any new materials. The recycled sandwich square honeycomb were also put through the same set of tensile and compression test in order to investigate the strength and energy absorption capabilities. Tensile strength of kenaf/PLA composite recorded the highest value of 36.28 MPa for new composite and 19.72 MPa for recycled composite. After the recycling process, the tensile strength exhibit a reduction between 5-45 %. The Poisson’s ratio of the composite both new and recycled was also recorded between 0.2-0.3, which is the normal range for natural fibre composites. Besides that, in term of scaling factor, the value of compression stress and energy absorption increased when the number of cell increased. The sugar palm/PLA indicated the highest increment of 115.20% when the number of slots doubled. Meanwhile, FE model was developed and analysed using ABAQUS 6.13 software to verify the experimental results obtained. However, when the natural fibre composite was recycled, kenaf/PLA recycled composite recorded the highest maximum stress of 7.8 MPa and energy absorption value of 720.12 J compared to recycled pineapple/PLA and sugar palm/PLA composite. Finally, the comparison between the FE model and experimental data presented a small percentage error of 10.97 % due to the geometries’ imperfections of the experimental sandwich square honeycomb structures. This showed that the recycled natural fibre composite has a good possibility to be used to replace current materials in low load bearing application especially in furniture making industry.
610 2 0 _aFaculty of Mechanical Engineering
_xDissertations
650 0 _aUniversities and colleges
_xDisertations
650 0 _aTheses
999 _aVIRTUA40
_c7870
_d7876
999 _aVTLSSORT0080*0200*0400*0900*1000*2450*2640*2641*3000*3360*3361*3370*3371*3380*3381*3470*5000*5020*5040*5200*6100*6500*6501*9992