IEC TR 62048:2014

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Symbols
4 General approach
5 Formula types
6 Measuring parameters for fibre reliability
7 Examples of numerical calculations
8 Fibre weakening and failure
9 Fatigue testing
10 Proof-testing
11 Statistical description of strength by Weibull
   probability models
12 Reliability prediction
13 B-value: elimination from formulae, and measurements
Annex A (informative) - Statistical strength
        degradation map
Bibliography

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