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Environmental Fatigue of Silicate Glasses in Humid Conditions
Author(s) -
Tang Zhongzhi,
Brow Richard K.
Publication year - 2014
Publication title -
international journal of applied glass science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 34
eISSN - 2041-1294
pISSN - 2041-1286
DOI - 10.1111/ijag.12068
Subject(s) - humidity , silicate glass , materials science , soda lime , relative humidity , composite material , silicate , silica glass , dew point , meteorology , chemical engineering , physics , engineering
Failure strains of commercial silica, soda‐lime‐silicate, and E‐glass fibers were measured using two‐point bending in room temperature humid air. Humidity dependence and dynamic fatigue behavior were studied, and the fatigue reaction orders in terms of humidity were determined. In the humidity range tested (~0.1% to ~100%), the dynamic fatigue parameters for silica and E‐glass are found to be greater in lower humidity (~0.1% to ~10%), whereas the fatigue parameter for soda‐lime‐silicate is independent of humidity. The humidity dependence of failure strains for all three glasses was more pronounced in high humidity (~10% to ~100%) than in low humidity (~0.1% to ~10%), indicating that the reaction order decreases with decreasing humidity. These observations were correlated with the different structures of the glasses and their corresponding fatigue mechanisms.