Based on chemical kinetics model,it is described that the rate of crack extension in silica based optical fiber as a function of the applied stress and the presence of reactive species.The approach builds upon previous fracture models that treat the atomic bond rupture broces at the crack tip as stress enhanced hydrolysis reaction.It is derived that stress dependence for siloxane hydrolysis from measurement of hydrolysis rates for strained silicate ring structures.The stress dependence determined for silo...
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