PD 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

Provides formulae to estimate the reliability of fibre under a constant service stress based on a power law for crack growth.

This technical r eport 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.

NOTE Power law is derived empirically, but there are other laws which have a more physical basis (for example, the exponential law). All these laws generally fit short -term experimental data well but lead to different long -term predictions. The power law has been selected as a most reasonable representation of fatigue behaviour by the experts of several standard-formulating bodies.