Share Email Print

Proceedings Paper

Fourier Transform Infrared (FTIR) Fiber Optic Monitoring Of Composites During Cure In An Autoclave
Author(s): Mark A. Druy; Lucy Elandjian; William A. Stevenson; Richard D. Driver; Garett M. Leskowitz; Lawrence E. Curtiss
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Real time in situ monitoring of the chemical states of epoxy resins were investigated during cure in an autoclave using infrared evanescent spectroscopy. Fiber evanescent sensors were developed which may be sandwiched between the plies of the prepreg sample. In this work a short length of sapphire fiber as the sensor cell portion of the fiber probe was utilized. Heavy metal fluoride glass (HMFG) optical fiber cables were designed for connecting the FTIR spectrometer to the sensor fiber within the autoclave. The sapphire fibers have outstanding mechanical properties (Young's Modulus 65 = Mpsi) and outstanding thermal properties (T. = 2000°C) which should permit their use as an embedded link in all thermoset composites. The system is capable of operation at a temperature of 250°C (482 °F) for periods up to 8 hours without major changes to the fiber transmission. A discussion of the selection of suitable sensor fibers, the construction of a fiber optic interface, and the interpretation of in situ infrared spectra of the curing process is pre-sented.

Paper Details

Date Published: 5 February 1990
PDF: 10 pages
Proc. SPIE 1170, Fiber Optic Smart Structures and Skins II, (5 February 1990); doi: 10.1117/12.963093
Show Author Affiliations
Mark A. Druy, Foster-Miller, Inc. (United States)
Lucy Elandjian, Foster-Miller, Inc. (United States)
William A. Stevenson, Foster-Miller, Inc. (United States)
Richard D. Driver, IRIS Fiber Optics, Inc. (United States)
Garett M. Leskowitz, IRIS Fiber Optics, Inc. (United States)
Lawrence E. Curtiss, IRIS Fiber Optics, Inc. (United States)

Published in SPIE Proceedings Vol. 1170:
Fiber Optic Smart Structures and Skins II
Eric Udd, Editor(s)

© SPIE. Terms of Use
Back to Top