Static fatigue N parameter error using test glass tubes

Gilberto M. Camilo

doi:10.1117/12.424362

16 April 2001 Static fatigue N parameter error using test glass tubes

Gilberto M. Camilo

Proceedings Volume 4215, Optical Fiber and Fiber Component Mechanical Reliability and Testing; (2001) https://doi.org/10.1117/12.424362
Event: Information Technologies 2000, 2000, Boston, MA, United States

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.

Citation Download Citation

Gilberto M. Camilo "Static fatigue N parameter error using test glass tubes", Proc. SPIE 4215, Optical Fiber and Fiber Component Mechanical Reliability and Testing, (16 April 2001); https://doi.org/10.1117/12.424362

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KEYWORDS

Glasses

Optical fibers

Failure analysis

Optical coatings

Protactinium

Statistical analysis

Time metrology

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