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Effect of Humidity on Small‐Crack Growth in Silica Optical Fibers
Author(s) -
Muraoka Mikio,
Ebata Kiyoshi,
Abé Hiroyuki
Publication year - 1993
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1993.tb03937.x
Subject(s) - humidity , relative humidity , materials science , composite material , power function , stress (linguistics) , intensity (physics) , air humidity , optics , meteorology , mathematics , physics , mathematical analysis , linguistics , philosophy
Subcritical small‐crack growth in silica optical fibers was measured directly in air at 25°C for several humidity conditions from 30% to 90% relative humidity. The crack velocity data were shown to be closely fitted by a power function of the stress intensity factor. It was found that the power n is independent of humidity and takes a value of 21.7. It was also revealed that crack velocity varies with relative humidity to a power of 2.5, which agrees with estimates from the published dynamic fatigue data concerning the humidity dependence of the strength of pristine silica fibers.