| Type of Document |
Master's Thesis |
| Author |
McBagonluri-Nuuri, David Fred
|
| Author's Email Address |
dmcbagon@vt.edu |
| URN |
etd-72198-155929 |
| Title |
Simulation of Fatigue Performance & Creep Rupture
of Glass-Reinforced Polymeric Composites for
Infrastructure Applications |
| Degree |
Master of Science |
| Department |
Engineering Science and Mechanics |
| Advisory Committee |
| Advisor Name |
Title |
| Lesko, John J. |
Committee Chair |
| Case, Scott W. |
Committee Member |
| Dillard, David A. |
Committee Member |
| Gao, David Y. |
Committee Member |
|
| Keywords |
- Glass Composites
- Fatigue
- Environmental Effects
- Lattice Green's Function
- Creep Rupture
- Fiber Bundle
- Local Load Sharing
|
| Date of Defense |
1998-08-18 |
| Availability |
unrestricted |
Abstract
A simulation model which incorporates the statistical- and numerical-based Lattice Green Function Local Load Sharing Model and a Fracture Mechanics-based Residual Strength Model has been developed. The model simulates creep rupture by imposing a fixed load of constant stress on the composite over the simulation duration. Simulation of the fatigue of glass fiber-reinforced composites is achieved by replacing the constant stress parameter in the model with a sinusoidal wave function. Results from the creep rupture model using fused silica fiber parameters, compare well with S-2 glass/epoxy systems. Results using Mandell's postulate that fatigue failure in glass fiber-reinforced polymeric composites is a fiber-dominated mechanism, with a characteristic slope of 10 %UTS/decade are consistent with available experimental data. The slopes of fatigue curves for simulated composites for three frequencies namely: 2, 5 and 10 Hz are within 12-14 %UTS/decade compared with that of 10.6-13.0%UTS/decade for unidirectionl glass reinforced composites (epoxy and vinyl ester) obtained from Demers' [40] data.
|
| Files |
| Filename |
Size |
Approximate Download Time
(Hours:Minutes:Seconds)
|
| 28.8 Modem |
56K Modem |
ISDN (64 Kb) |
ISDN (128 Kb) |
Higher-speed Access |
| |
Thesis.pdf |
1.20 Mb |
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