| Document Type: | Master's Thesis |
| Name: | David Fred McBagonluri-Nuuri |
| Email address: | dmcbagon@vt.edu |
| URN: | 1998/00946 |
| Title: | Simulation of Fatigue Performance & Creep Rupture of Glass-Reinforced Polymeric Composites for Infrastructure Applications |
| Degree: | Master of Science |
| Department: | Engineering Science & Mechanics |
| Committee Chair: | John J. Lesko |
| Chair's email: | jlesko@vt.edu |
| Committee Members: | Scott Case |
| David Gao | |
| David Dillard | |
| Keywords: | Glass Composites, Fatigue, Environmental Effects, Lattice Greenÿs Function, Creep Rupture, Fiber Bundle, Local Load Sharing |
| Date of defense: | August 18, 1998 |
| Availability: | Release the entire work immediately worldwide. |
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.
List of Attached Files | ||
| Thesis.pdf | ||