Abstract

The strength distribution for 400 measurements on 0.61 m-length fused silica optical fiber specimens exhibits a bimodal behavior. The cumulative failure probability is presented for Weibull-type distribution and is analyzed by assuming that the strength distribution is comprised of two distinct populations. It is demonstrated that finite lower and upper strength limits of each population within the strength distribution must be included in the distribution model. This leads to a reasonable description of the failure probability for the measured strength and provides the best prediction of the strength in long lengths.

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