TIA/EIA-455-76

Description / Abstract: This method of measuring the tensile strength of a fiber at specified constant rates of loading is designed for determining the dynamic fatigue parameters of optical fiber. Since this method is 100% destructive, it shall not be a substitute for any proof testing.

This method is intended to estimate the dynamic fatigue parameter of individual optical fiber lengths. It shall not be used for cable or fiber bundles. The use of these parameters for reliability estimates is still under study. A method for extrapolating the dynamic fatigue parameters to service environments different from the default environment specified in this FOTP (23 degrees C and 50% RH) has not been developed.

This method is intended to be used only for those optical fibers for which the median strength is greater than 3100 MPa (450 kpsi) at 25%/minute strain rate.

This method is intended to test fatigue behavior of fibers by varying the strain rate. The test is applicable to fibers and strain rates for which the log of fracture stress versus the log of strain behavior is linear.