000 04107ntm a2200373 i 4500
001 vtls000105301
003 KUKTEM
005 20251117113405.0
008 180926t20182018my a f a m 001 0 eng d
020 _aTHE0005287(Local)
039 9 _a201905151026
_bhanafiah
_y201809261105
_zfateeha
040 _aUMP
_beng
_cUMP
_erda
090 _aFKM .Z35 2018 r Thesis
100 0 _aNoor Zakiah Md Zaid,
_eauthor.
245 1 0 _aMechanical performance of lightweight sandwich structures based on trapezoidal corrugated-cores /
_cNoor Zakiah Md Zaid
264 1 _aKuantan, Pahang :
_bUMP,
_c2018
264 4 _c© 2018
300 _axiii, 95 pages :
_billustrations (some color) ;
_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) -- Universiti Malaysia Pahang – 2018
504 _aIncludes bibliographical references
520 3 _aTrapezoidal corrugated-core was fabricated using a 45˚ profiled mould, and used to form a range of lightweight sandwich structures. The 45˚ corrugation angle was chosen since it represents an optimal configuration for all combinations of bending, shearing and strain. The compressive behaviour and failure mechanism in the structures based on two different materials have been investigated experimentally. Trapezoidal corrugated-core is made of carbon fibre reinforced polymer (CFRP) and glass fibre reinforced polymer (GFRP). The aim of this research work is to study the behaviour of trapezoidal corrugated-core subjected to compression stress and to produce a model of mechanical response of trapezoidal corrugated-core with sandwich structures and to study the effect of varying the geometrical parameters on the corrugated-core behaviour. Corrugated composites were designed using hand-layup technique and then bonded to skins using adhesive based on the same material, to produce a range of lightweight sandwich structures. The thickness of the cell walls, number of unit and width cell are used in determining the behaviour of the mechanical structures. The initial failure modes in this corrugated structure are struts buckling, fibre cracking, and delamination in the composite structure. Besides that, the debonding between the skins and the core were also investigated. Compression loading was subsequently performed on the trapezoidal corrugated structure, where the compression strength shows increasing for all the corrugation structure. To simulate the mechanical response of the corrugation structure, Finite Element (FE) models have been generated using ABAQUS. The results were compared to measure the experimental outcome. From the finding, the effects of varying the number of unit cell dominate by CFRP are 3.48 MPa higher than GFRP that 2.08 MPa at three unit cell. It shows that the higher number of unit cells it will affects the composite strength. For the effect of cell wall thickness, the results show that the higher the wall thickness, the higher the compression strength. The compression strength of CFRP and GFRP are 3.48 MPa and 1.74 MPa respectively at 1.75 mm and 1.90 mm thickness. The structures show excellent repeatability in terms of their mechanical response. The mechanical response in compression increases with specimen thickness. Validation Finite Element and experimental data, a very good deal is found between experimental and finite element values. This observation is validated by computing the percentage error between the finite element and the experimental results with average difference around 4.97% in maximum load.
610 2 0 _aFaculty of Mechanical Engineering
_xDissertations
650 0 _aUniversities and colleges
_xDisertations
650 0 _aTheses
999 _aVIRTUA40
_c7835
_d7841
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