IEC TR 62048:2014(E) is a guideline that gives formulae to estimate the reliability of fibre under a constant service stress based on a power law for crack growth. This third edition cancels and replaces the second edition published in 2011, and constitutes a technical revision. The main changes with respect to the previous edition are listed below:
- correction to the unit of failure rates in Table 1,
- correction to the FIT equation for instantaneous failure rate [19] in addition to all call-outs and derivations,
- insertion of a new note about fibre length dependency of failure rates,
- addition of informative Annex A and relevant reference,
- editorial corrections of inconsistencies. Keywords: reliability of fibre, service stress, power law for crack growth