THEORY AND MEASUREMENT FOR PREDICTING STRESSED FIBER LIFETIME

The theory behind experiments used in evaluating fiber parameters needed in the prediction of fiber lifetime is given and the theory is put into a general and unified perspective. Demonstrations are given of how measured parameters may be utilized in new equations to calculate lifetime for a fiber under constant stress. Then an experimental program is outlined in which both static and dynamic fatigue data are analyzed for commercially available fibers. The resulting parameters are obtained for several environments and geometries and are used for lifetime predictions for various deployments.