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Proceedings Paper

Fiber optic sensor design for chemical process and environmental monitoring
Author(s): R. S. Mahendran; D. Harris; L. Wang; V. R. Machavaram; R. Chen; St. N. Kukureka; G. F. Fernando
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Paper Abstract

Cure monitoring is a term that is used to describe the cross-linking reactions in a thermosetting resin system. Advanced fiber reinforced composites are being used increasingly in a number of industrial sectors including aerospace, marine, sport, automotive and civil engineering. There is a general realization that the processing conditions that are used to manufacture the composites can have a major influence on its hot-wet mechanical properties. This paper is concerned with the design and demonstration of a number of sensor designs for in-situ cure monitoring of a model thermosetting resin system. Simple fixtures were constructed to enable a pair of cleaved optical fibers with a defined gap between the end-faces to be held in position. The resin system was introduced into this gap and the cure kinetics were followed by transmission infrared spectroscopy. A semi-empirical model was used to describe the cure process using the data obtained at different cure temperatures. The same sensor system was used to detect the ingress of moisture in the cured resin system.

Paper Details

Date Published: 1 November 2007
PDF: 8 pages
Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64232S (1 November 2007); doi: 10.1117/12.780021
Show Author Affiliations
R. S. Mahendran, Univ. of Birmingham (United Kingdom)
D. Harris, Univ. of Birmingham (United Kingdom)
L. Wang, Univ. of Birmingham (United Kingdom)
V. R. Machavaram, Univ. of Birmingham (United Kingdom)
R. Chen, Univ. of Birmingham (United Kingdom)
St. N. Kukureka, Univ. of Birmingham (United Kingdom)
G. F. Fernando, Univ. of Birmingham (United Kingdom)

Published in SPIE Proceedings Vol. 6423:
International Conference on Smart Materials and Nanotechnology in Engineering

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