Effect of carbon overcoating on the mechanical behavior of large flaws

Matthew G. Estep; G. Scott Glaesemann

doi:10.1117/12.141170

25 February 1993 Effect of carbon overcoating on the mechanical behavior of large flaws

Matthew G. Estep, G. Scott Glaesemann

Proceedings Volume 1791, Optical Materials Reliability and Testing: Benign and Adverse Environments; (1993) https://doi.org/10.1117/12.141170
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

It is found that by abrading an optical fiber surface, a controlled strength distribution can be produced that is effective for dynamic fatigue testing of large flaws. Dynamic fatigue testing of 30 kpsi flaws overcoated with carbon yielded n values greater than 100. It is believed that the abraded fiber samples can be utilized as a surrogate for measuring the fatigue parameters of carbon coated splices and flaws near the proof test level. In addition, it was found that overcoating abraded fiber with carbon increased the strength by a factor of two. This increase is more than what would be predicted by the increase in fatigue resistance that comes with carbon overcoating, and suggests deposition of carbon alters the flaw geometry or stress field surrounding the flaw.

Citation Download Citation

Matthew G. Estep and G. Scott Glaesemann "Effect of carbon overcoating on the mechanical behavior of large flaws", Proc. SPIE 1791, Optical Materials Reliability and Testing: Benign and Adverse Environments, (25 February 1993); https://doi.org/10.1117/12.141170

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