Design And Analysis Of Filament- Wound Compressed Natural Gas Carbon Fibre - Reinforced Composite Tank
First ply failure (FPF) strengths of laminated composite tank subjected to uniform internal pressure loads are studied via both analytical and finite element analysis approaches. The filament-wound CNG carbon fibre reinforced composite tanks are designed with a T6-6061 aluminium cylinder with el...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English English |
| Published: |
2008
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/5404/1/fk_2008_33.pdf |
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| Summary: | First ply failure (FPF) strengths of laminated composite tank subjected to
uniform internal pressure loads are studied via both analytical and finite
element analysis approaches. The filament-wound CNG carbon fibre
reinforced composite tanks are designed with a T6-6061 aluminium
cylinder with elliptical end closures acts as the liner which is overwrapped
with high modulus carbon fibre-reinforced epoxy composite.
The objectives of this study are to optimize the composite layer
thickness and to optimize fibre orientation configurations of carbon fibre
laminate as to have a lightweight and high performance filament-wound
CNG carbon fibre-reinforced composite tanks. In analytical approaches,
in order to predict the first-ply failure (FPF) pressure of filament-wound
CNG carbon fibre-reinforced composite tanks, the stresses and strains throughout the laminate were determined using the classical lamination
theory which were then used in three most common composite failure
theories, that are the maximum stress theory, maximum strain theory,
and quadratic or Tsai-Wu failure theory.
Optimal general design of fibre orientations were then used to carry out
in lay-up optimization or arrangement of composite layer stage to be
used for filament winding process in order to study the effect of fibre
orientation angles using an equal thickness of composite layer on the
tank performance. The range of helical angles used is in between 0° to
60°, which is based on the traditional theoretical optimal helical angles
from classical lamination theory. The ratio of 2:1 hoop to helical angles is
used to predict the maximum first-ply failure (FPF) pressure.
The optimization results gave the optimal fibre orientations of the
[( ) ] 11 24 30 /− 30 / 90 with b/a = 1.093 for CNG 1, b/a = 1.110 for CNG 2 and
b/a = 1.128 for CNG 3 which obtained were then used for stress analysis
in finite element analysis using ANSYS version 7.1 software. The
accuracy of the theoretical and finite element analysis of first-ply failure
(FPF) pressure is verified by a verification study where a similar finite
element model from literature have been modelled and analysed using
similar method used to design filament wound CNG carbon fibrereinforced
composite tanks in order to verify a valid finite element
method used. The results were then being compared literature study. |
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