Structural dynamic characterization of biobased micro aerial vehicles / Rubentheren Viyapuri
Micro Aerial Vehicle, MAVs is latest generation of aircraft inspired from micro natural fliers. Mimicking those fliers need extensive research and fine tools. Besides flight dynamics, propulsion system and structures integrity, wings plays a very important role in creating lifts and vortices to m...
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Format: | Thesis |
Published: |
2013
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Online Access: | http://studentsrepo.um.edu.my/8225/13/front_part.pdf http://studentsrepo.um.edu.my/8225/4/chap_1_to_5v2.1.pdf http://studentsrepo.um.edu.my/8225/ |
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Summary: | Micro Aerial Vehicle, MAVs is latest generation of aircraft inspired from micro natural
fliers. Mimicking those fliers need extensive research and fine tools. Besides flight
dynamics, propulsion system and structures integrity, wings plays a very important role in
creating lifts and vortices to make a successful liftoff. MAV wings subjected to enormous
level of mechanical stress due to flapping frequencies and posses a wide area to scope air.
With all those bombardment, MAV wings should perform in a harmonize way with the
stress being generated, yet the wing should be keep at minimum weight as possible. This
research work is intended to investigate the mechanical properties of thin film PVA with
biomimetic units drawn on the surface on the film for the application of MAV wing
membrane. Biomimetic units grid, striation, spot were drawn on the surface of PVA thin
film by means of heated geometry cutter. A control specimen named no pattern were then
compared with the biomimetic specimen in terms of tensile testing for mechanical
properties, DMA analysis for viscoelastic properties and DSC analysis for percentage of
crystallinity. Result shows grid specimen exhibit highest level of mechanical properties and
viscoelastic properties. This is due to the percentage of crystallinity formed in grid was the
highest and thus elevate the mechanical properties of PVA thin film. Heated geometry
cutter creates localized heat to melt the polymer and solidify quickly which crystallize the
edge of the drawn pattern and in turn improve the mechanical properties when compared to
pure PVA thin film. |
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