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Design, Analysis, Manufacturing, and Testing of Ceramic and Polymer Matrix Nanocomposites
|Title:||Design, Analysis, Manufacturing, and Testing of Ceramic and Polymer Matrix Nanocomposites|
|Contributors:||Ghasemi-Nejhad, Mehrdad MGN (advisor)|
Mechanical Engineering (department)
show 4 moreInterlaminar Fracture Toughness
|Publisher:||University of Hawai'i at Manoa|
|Abstract:||Chapter 1 of this thesis presents the Introduction and background for this thesis. InChapter 2 of this thesis, ceramic nanocomposites are introduced as a viable alternative to current|
material used in space telescopes. Based on SOLIDWORKS Finite Element Analysis, replacing
the current combination of Titanium and Nitronic 60, used in the hinge of the primary mirror
wing of the James Webb Space Telescope, by the new ceramic nanocomposite made from
compaction, cure, and pyrolysis of newly developed Nano-Paste, in the Hawaii Nanotechnology
Laboratory (HNL), made of SMP-10, silicon carbide nanoparticles, and carbon nanotubes
(CNTs), will dramatically lower the strain and displacement on the mirror structure caused by
thermal and structural loads. Low strain and displacement, under thermal and structural loads
will lead to better performance, while lower density of the new ceramic material will also allow
for significant weight savings for the next generation of telescopes.
In Chapter 3 of this thesis, the effects of the inclusion of vertically aligned carbon
nanotube Nanoforest II, VA-CNT-NF-II, and horizontally aligned carbon nanotube Nanoforest
II, HA-CNT-NF-II, on interlaminar fracture toughness of prepreg carbon fiber laminates have
been investigated and reported. The CNTs included in these samples were synthesized using
Chemical Vapor Deposition (CVD) furnace, on steel substrate. The CNT-NF-II layers were then
transferred onto the prepreg using a Hot Press. Double Cantilever Beam (DCB) testing in
accordance with the ASTM test standard D 5528-01 shows exceptional improvements in Mode I
(i.e., Opening Mode) interlaminar fracture toughness of both sets of NF-II samples when
compared with the pristine (i.e., when no CNT-NF included), with the highest improvement (i.e.,
174%) shown in the case of HA-CNT-NF-II samples followed by 124% improvement for the
case of VA-CNT-NF-II.
|Rights:||All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.|
|Appears in Collections:||
M.S. - Mechanical Engineering|
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