<title>Cyclic fatigue of high-strength optical fibers in bending</title>

Abstract

Optical fiber may experience cyclic stresses at frequencies ranging from a few hertz in aerial cables to over a kilohertz due to vibration of machinery. The fatigue behavior of brittle materials typically gives times to failure that correspond to a suitably time-averaged applied stress and is independent of the frequency. Previous studies have been limited in the frequencies used but generally show agreement with this simple model. In this paper we describe results for the cyclic fatigue behavior of high strength fused silica optical fibers as a function of stress amplitude and frequency in the range of zero to 100 Hz. The results confirm that fatigue of this material is indeed accurately described by the subcritical crack growth model and the results are shown to be frequency independent in the range studied.

Application Of FBG Sensors For Fatigue Monitoring Of Advanced Polymer Matrix Composites

“…Thus far, a number of studies showed that FBGs exhibit good durability under cyclic loading [13,14,57]. For instance, Matthewson et al [59] studied fatigue performance of the optical fibers (fused silica OF and acrylate coating) in bending at frequencies ranging from 0-100 Hz. They concluded that frequency of the cyclic loading has a minimal effect on the optical fiber in the specified stress range (up to the max load of 5050 MPa).…”