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Title: Fiber-optic sensors for composite cure analysis and lifetime nondestructive evaluation

Abstract

A proposed multiplexed fiber-optic sensor system capable of analyzing a composite material during its curing cycle and over its service lifetime is presented. The sensor is composed of two independent sensing schemes that will ultimately be multicomplexed onto a specialized single-mode/multimode optical fiber. The first sensing scheme is a fiber-optic viscosity and temperature sensor used for composite cure analyses. This sensor is based on (1) the laser-induced viscosity-dependent fluorescence phenomena observed in epoxy-based composite materials and (2) the temperature-dependent decay-time fluorescence phenomena observed in thermographic phosphors. The second sensor is based on a low-finesse, single-mode fiber-optic Fabry-Perot interferometer and is used as a strain/vibration sensor for lifetime nondestructive evaluations on composites. Experimental results have determined that these sensor concepts are feasible alternatives to cure-analysis monitors and conventional strain-analysis techniques. 15 refs., 7 figs.

Authors:
; ; ; ;  [1]
  1. Oak Ridge National Lab., TN (USA)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
DOE/ER
OSTI Identifier:
5422195
Report Number(s):
CONF-891091-2
ON: DE90001739
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Conference
Resource Relation:
Conference: 8. international congress on applications of lasers and electro-optics (ICALEO 8), Orlando, FL (USA), 15-20 Oct 1989
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 47 OTHER INSTRUMENTATION; COMPOSITE MATERIALS; NONDESTRUCTIVE TESTING; CURING; DEFECTS; EPOXIDES; FABRY-PEROT INTERFEROMETER; FIBER OPTICS; MEASURING INSTRUMENTS; TEMPERATURE MEASUREMENT; INTERFEROMETERS; MATERIALS; MATERIALS TESTING; ORGANIC COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; TESTING; 360601* - Other Materials- Preparation & Manufacture; 440300 - Miscellaneous Instruments- (-1989)

Citation Formats

Muhs, J D, Cates, M R, Tobin, K W, Capps, G J, and Beshears, D L. Fiber-optic sensors for composite cure analysis and lifetime nondestructive evaluation. United States: N. p., 1989. Web. doi:10.2351/1.5058351.
Muhs, J D, Cates, M R, Tobin, K W, Capps, G J, & Beshears, D L. Fiber-optic sensors for composite cure analysis and lifetime nondestructive evaluation. United States. https://doi.org/10.2351/1.5058351
Muhs, J D, Cates, M R, Tobin, K W, Capps, G J, and Beshears, D L. 1989. "Fiber-optic sensors for composite cure analysis and lifetime nondestructive evaluation". United States. https://doi.org/10.2351/1.5058351. https://www.osti.gov/servlets/purl/5422195.
@article{osti_5422195,
title = {Fiber-optic sensors for composite cure analysis and lifetime nondestructive evaluation},
author = {Muhs, J D and Cates, M R and Tobin, K W and Capps, G J and Beshears, D L},
abstractNote = {A proposed multiplexed fiber-optic sensor system capable of analyzing a composite material during its curing cycle and over its service lifetime is presented. The sensor is composed of two independent sensing schemes that will ultimately be multicomplexed onto a specialized single-mode/multimode optical fiber. The first sensing scheme is a fiber-optic viscosity and temperature sensor used for composite cure analyses. This sensor is based on (1) the laser-induced viscosity-dependent fluorescence phenomena observed in epoxy-based composite materials and (2) the temperature-dependent decay-time fluorescence phenomena observed in thermographic phosphors. The second sensor is based on a low-finesse, single-mode fiber-optic Fabry-Perot interferometer and is used as a strain/vibration sensor for lifetime nondestructive evaluations on composites. Experimental results have determined that these sensor concepts are feasible alternatives to cure-analysis monitors and conventional strain-analysis techniques. 15 refs., 7 figs.},
doi = {10.2351/1.5058351},
url = {https://www.osti.gov/biblio/5422195}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

Conference:
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