Foreword

1Scope

2Normative references

3Symbols

4Principle

5Apparatus

5.1Testing machine

5.2Test fixtures

6Test specimens

7Test procedure

7.1Test forces

7.1.1Minimum force

7.1.2Maximum force

7.1.3Test force

7.1.4Force application

7.2Conformity test

7.2.1Purpose

7.2.2Endurance

7.2.3Minimum test force

7.2.4Maximum test force

7.2.5Number of tests

7.2.6Acceptance

7.3Staircase test

7.3.1Purpose

7.3.2Description

7.3.3Endurance

7.3.4Rules for conducting a staircase test

7.3.5Determining step size

8Staircase test data analysis

8.1Data

8.2Plotting staircase data

8.3Statistical calculations

8.3.1Mean fatigue strength: 0,50 probability of survival

8.3.2Standard deviations

8.3.3Fatigue limit: 0,998 65 probability of survival

9Report of test results

9.1Test chain information

9.2Test equipment and procedures

9.2.1Test equipment

9.2.2Test procedures

9.3Test results for conformity and staircase tests

Annex ASurvival test with abridged Probit analysis (informative)

A.1Principle

A.2Description

A.3Test procedure

A.3.1Test specimens

A.3.2Endurance

A.3.3Force levels

A.3.4Testing

A.4Analysis procedure

A.4.1General

A.4.2Distributions

A.4.3Standard deviation

A.4.4Mean fatigue limit

A.5Step size

A.6Example

Annex BCombined test methods (informative)

B.1Purpose

B.2Description

B.3Test procedure

B.3.1Test specimens

B.3.2Endurance

B.3.3Force levels

B.3.4Testing

B.3.4.1Preliminary tests

B.3.4.2Finite life tests

B.3.4.3Staircase tests

B.4Analysis procedure

B.4.1Finite life portion

B.4.2Staircase portion

B.5R–F–N curve

B.6Sample test report and graph

Annex CJustification for adding one step to fatigue limit in staircase analysis (informative)

C.1General

C.2Analysis

C.3Conclusions

Annex DAdding an additional “phantom” point at the end of staircase test (informative)

Annex EReporting fatigue test results (informative)

E.1General

E.2Tabular presentation of results

E.3Graphical presentation, suggested forms

E.3.1General

E.3.2Types of graph

E.3.3F-Log N graph

E.3.4Log F-Log N graph

E.4Sample test reports

Annex FEstablishing chain application fatigue ratings (informative)

F.1Overview

F.2Methods

F.2.1Chain length

F.2.2Sample size

F.2.3Sample representativeness

F.3Other factors

F.3.1Statistical limits

F.3.2Fatigue life

F.3.3Wear

F.3.4Unidentified factors

F.4Sample calculations

Annex GExtrapolating fatigue strength from 3 × 10 to 10 cycles (informative)

G.1General

G.2Test data

G.3Constructed staircases

G.3.1Phantom points

G.3.2Constructed staircase with endurance at 10 cycles

G.3.3Constructed staircase with endurance at 5 × 10 cycles

G.3.4Constructed staircase with endurance at 3 × 10 cycles

G.3.5Sample staircases and histograms

G.4Staircase analysis

G.4.1Means

G.4.2Differences

G.4.3Fatigue test staircases for 80 chain

G.4.4Fatigue test histograms for 80 chain

Annex HFinite life testing and data analysis (informative)

H.1General

H.2Test procedure

H.2.1Test specimens

H.2.2Inflection point

H.2.3Force levels

H.2.3.1Number of force levels

H.2.3.2Values of force levels

H.2.4Number of tests

H.3Data analysis

H.3.1Data

H.3.2Statistical distributions

H.3.3Determining force–life (F−N) lines

H.3.3.1General relationships

H.3.3.2Mean regression line: 0,50 probability of survival

H.3.3.2.1Normal force distribution

H.3.3.2.2Log-normal force distribution

H.3.3.3Minimum regression line: 0,97725 (−2σ) probability of survival

H.3.3.3.1Normal force distribution

H.3.3.3.2Log-normal force distribution

H.4Sample test results

Bibliography