1、 IEC TR 62048 Edition 3.0 2014-01 TECHNICAL REPORT Optical fibres Reliability Power law theory IEC TR 62048:2014-01(EN)colourinsideCopyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-27-2014 by James Madison.No further reproduction or distribution is permit
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11、Reuters(Scientific),Inc.,downloaded on Nov-27-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.IEC TR 62048 Edition 3.0 2014-01 TECHNICAL REPORT Optical fibres Reliability Power law theory INTERNATIONAL ELECTROTECHNICAL COMMISSION XB ICS 33.180.10
12、PRICE CODE ISBN 978-2-8322-1369-8 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinsideCopyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-27-20
13、14 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.2 TR 62048 IEC:2014(E)CONTENTS FOREWORD.5 INTRODUCTION.7 1 Scope.8 2 Normative references.8 3 Symbols.8 4 General approach.10 5 Formula types.10 6 Measuring parameters for fibre reliability.11 6.1 Over
14、view.11 6.2 Length and equivalent length.11 6.3 Reliability parameters.12 6.3.1 Overview.12 6.3.2 Proof-testing.12 6.3.3 Static fatigue.12 6.3.4 Dynamic fatigue.13 6.4 Parameters for the low-strength region.13 6.4.1 Overview.13 6.4.2 Variable proof test stress.13 6.4.3 Dynamic fatigue.14 6.5 Measure
15、d numerical values.17 7 Examples of numerical calculations.17 7.1 Overview.17 7.2 Failure rate calculations.18 7.2.1 FIT rate formulae.18 7.2.2 Long lengths in tension.18 7.2.3 Short lengths in uniform bending.20 7.3 Lifetime calculations.22 7.3.1 Lifetime formulae.22 7.3.2 Long lengths in tension.2
16、2 7.3.3 Short lengths in uniform bending.23 7.3.4 Short lengths with uniform bending and tension.25 8 Fibre weakening and failure.26 8.1 Crack growth and weakening.26 8.2 Crack fracture.28 8.3 Features of the general results.29 8.4 Stress and strain.30 9 Fatigue testing.30 9.1 Overview.30 9.2 Static fatigue.30 9.3 Dynamic fatigue.32 9.3.1 Overview.32 9.3.2 Fatigue to breakage.32 9.3.3 Fatigue to a maximum stress.34 9.4 Comparisons of static and dynamic fatigue.34 9.4.1 Intercepts and paramete
