000 04233ntm a2200373 i 4500
001 vtls000105485
003 KUKTEM
005 20251114204403.0
008 190219t20182018my a f am 000 0 eng d
020 _aTHE0005438(Local)
039 9 _a201905151516
_bhanafiah
_y201902191610
_znazri
040 _aUMP
_beng
_cUMP
_erda
090 _aFKP .Y37 2018 r Thesis
100 0 _aMohd Yashim Wong paul Tze,
_eauthor.
245 1 0 _aDesign analysis and structural optimisation of a rigid ankle foot orthosis /
_cMohd Yashim Wong Paul Tze
264 1 _aKuantan, Pahang :
_bUMP,
_c2018
264 4 _c© 2018
300 _axvi, 112 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 Manufacturing Engineering
502 _aThesis (Master of Science) -- Universiti Malaysia Pahang – 2018
504 _aIncludes bibliographical references
520 3 _aThe ideal type of Ankle Foot Orthosis (AFO) for treating patients with lower limb impairments are those that closely follow the wearer’s anthropometry. Most mass-produced AFO that are available in the market does not cater the aforementioned requirements nonetheless it is cost-effective. Conversely, the existing AFO that does conform to individual anthropometry is expensive due to complex geometry, requiring skilled and experienced orthotist. Adding to this cost is the long lead time required to produce a unit of orthosis. In order to mitigate the aforementioned problems of mass produced and individual-specific AFO, this thesis proposes a methodological framework that addresses these issues from the design phase to the fabrication phase. This methodological framework aims to rectify the cost and complexity issue by integrating inexpensive solutions into the design and fabrication stage. In the design phase, a low-cost 3D scanning is adopted to obtain an accurate 3D capture of an individual’s anthropometry. An initial AFO prototype is modelled based on this 3D capture data through the use of a commercially available Computer Aided Design (CAD) software package, Autodesk Inventor. Subsequently a tensile test was performed to investigate different mechanical properties arising from varying printing parameters namely; material orientation, build density and print layer thickness of Zortrax Acrylonitrile Butadiene Styrene (ABS) material which is the material used in the fabrication stage employing the use of a low cost Zotrax M200 3D printer. This experimental investigation is not trivial as it provides significant insight on the mechanical characteristics of the varying parameters mentioned above. Based upon the experimental investigation, the best printing parameters were fed into the Finite Element Model to further investigate the structural integrity of the design as well as to carry out the proposed Topology Optimisation method. The evaluation of the structural integrity is important in order to weigh the feasibility of using the Fused Deposition Modelling (FDM) process in the manufacture of tailor made AFO. A structural optimisation is carried out to reduce the weigh and subsequently the cost of production without comprising the structural integrity of the AFO. From the study, by the implementing structural optimisation, specifically the topology method, the end design exhibits a cost reduction 3% and an actual improvement in structural integrity particularly the factor of safety from 0.289 before optimization to 4.671 after optimization suggesting a marked improvement. Therefore, this study has contributed to the body of knowledge by demonstrating that the proposed methodological framework is sound in the manufacture of individually customised AFO.
610 2 0 _aFaculty of Manufacturing Engineering
_xDissertations
650 0 _aUniversities and colleges
_xDisertations
650 0 _aTheses
999 _aVIRTUA40
_c1176
_d1182
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