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Proceedings Paper

Static fatigue N parameter error using test glass tubes
Author(s): Gilberto M. Camilo
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Paper Abstract

In the Power Law Crack Growth Theory the strength reliability of optical fibers is based on some mechanical fiber parameters. The n parameter, or strength susceptibility parameter, is the most important because it is a two-order exponent number used to calculate the survival lifetime. To measure this parameter different mechanical tests can be performed, among them the dynamic fatigue in tensile and the static fatigue in two-point bending. Static fatigue in the two-point bending technique using glass tubes to accommodate the samples does not require a lot of space and it can easily be set in different harsh environments. But still some problems can affect the results of this technique: the internal diameter irregularities of the tubes, the fiber damage introduced to the samples in the lower diameter tubes, and the uncontrolled stress rate during the loading process for all tube diameters. Using a two-point bending apparatus, and faceplate supports, precise static fatigue bending tests were performed measuring the n error calculated with the tubes. This apparatus allowed us to hit the maximum stress under very well controlled stress rate and no sample manipulation during the entire process.

Paper Details

Date Published: 16 April 2001
PDF: 9 pages
Proc. SPIE 4215, Optical Fiber and Fiber Component Mechanical Reliability and Testing, (16 April 2001); doi: 10.1117/12.424362
Show Author Affiliations
Gilberto M. Camilo, Alcatel (United States)

Published in SPIE Proceedings Vol. 4215:
Optical Fiber and Fiber Component Mechanical Reliability and Testing
M. John Matthewson, Editor(s)

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