Book ChapterDOI
Interpretation of Embedded Optical Fiber Sensor Signals
James S. Sirkis
- pp 85-99
About:
The article was published on 1993-01-01. It has received 16 citations till now. The article focuses on the topics: Fiber optic sensor.read more
Citations
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Journal ArticleDOI
Cure monitoring of smart composites using Fiber Bragg Grating based embedded sensors
Abstract: A sensor embedded in the composite laminate can act as a temperature transducer during the composite cure mechanism. Once the composite is cured, the same sensor can be used to provide the information about the mechanical changes that influence the performance of the material. Fiber Bragg Grating (FBG) sensor is one such sensor which one can use for the composite cure monitoring. We present here the results obtained with an associated FBG sensor system for the cure monitoring of smart composites. The performance of the embedded FBG sensor smart composite specimens under 3- and 4-point bending conditions are also being investigated. Finally, the performance analysis has been extended to cantilever specimens.
Journal ArticleDOI
On-line health monitoring of smart composite structures using fiber polarimetric sensor
TL;DR: In this paper, the authors proposed a defect detection method for smart composite structures based on various parameters such as pre-stress, input azimuth, fiber turns etc. The authors used the concept of fiber polarimetric system for smart structure applications.
Journal ArticleDOI
Thin structure deflection measurement
A. Djordjevich,YuZhu He +1 more
TL;DR: A method of measuring deflection curvature and its conceptual advantages over strain measurement include: (1) position-invariant readings throughout the structural section; (2) sameness of the true and apparent measurands irrespective of the microstructural effects introduced by the sensor; and (3) higher sensitivity in the case of thin structures.
Journal ArticleDOI
Crack monitoring using multiple smart materials; fiber-optic sensors & piezo sensors
TL;DR: In this article, two fiber-optic sensors, namely fiber Bragg grating (FBG) and fiberoptic polarimetric sensor (FOPS), are investigated for damage detection in the beam specimen.
Journal ArticleDOI
On Interphase Modeling for Optical Fiber Sensors Embedded in Unidirectional Composite Systems
James S. Sirkis,I-Ping Lu +1 more
TL;DR: In this paper, the local stress of a polyimide coated optical fiber sensor surrounded by a transversely isotropic AS4-3501 graphite/epoxy host material is investigated.
References
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Book
Experimental Stress Analysis
TL;DR: In this paper, elementary elasticity and fraction mechanics stress strain and the stress-strain relationships basic equations and plane-elasticity theory are discussed and an introduction to strain measurements electrical resistance strain gages strain gage circuits recording instruments strain analysis methods.
Book
Elementary Numerical Analysis
TL;DR: This chapter discusses Taylor Polynomials, Numerical Linear Algebra, and the Finite Difference Method for PDEs, as well as other topics of interest to students of mathematics.
Proceedings ArticleDOI
Fiber Optic Bragg Grating Sensors
TL;DR: In this paper, the authors describe a new method to generate Bragg grating filters in germania-doped communication fibers and discuss their applications as sensors, which are formed by exposing a short section of the core, through the side of the fiber, to an interference pattern of intersecting coherent beams of UV light.
Journal ArticleDOI
Fiber optics strain gauge.
C D Butter,G. B. Hocker +1 more
TL;DR: A fiber optics strain gauge measuring strains of <0.4 × 10.2 × 10 m 1 is demonstrated, utilizing the change in optical pathlength caused by strain in a fiber.
Determination of the individual strain-optic coefficients in single-mode optical fibers
A. Bertholds,R. Dändliker +1 more
TL;DR: In this article, a method to determine the individual strain-optic coefficients in single-mode fibers is described, based on two photoelastic experiments, namely, the polarimetric measurement of optical activity induced by mechanical twist and the interferometric measurement of optic-path-length change induced by static longitudinal strain.