Title page for ETD etd-05092002-164605


Type of Document Master's Thesis
Author Cassino, Christopher Daniel
URN etd-05092002-164605
Title Detection of fiber fracture in Unidirectional Fiber Reinforced Composites using an In-Plane Fiber Optic Sensor
Degree Master of Science
Department Engineering Science and Mechanics
Advisory Committee
Advisor Name Title
Duke, John C. Jr. Committee Chair
Hajj, Muhammad R. Committee Member
Henneke, Edmund G. II Committee Member
Keywords
  • CFRP
  • Acoustic Emissions
  • EFPI
  • Structural Health Monitoring
Date of Defense 2002-04-26
Availability unrestricted
Abstract
Fiber reinforced polymers (FRP) are an efficient and inexpensive method of repairing deteriorating infrastructure. FRP sheets can be applied to spalling bridge sections and columns to prevent further deterioration and increase stiffness. However, the effect of the environment on the long-term durability of FRP and how the various damage mechanisms initiate and develop are not known. Systems for structural health monitoring are being sought as a means of managing important components in transportation systems as assets in light of modern life cycle cost concepts. This study characterizes a fiber optic sensor for use in detecting acoustic emissions (AE) in FRP. The results of AE analysis (signal amplitude, frequency spectra, MARSE, and in-plane displacement) caused by simulated fiber fracture experiments and other types of mechanical loading in FRP test coupons are reported. The applications to the development of FRP structural health monitoring systems are also discussed.
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