ASME B29.26 2013 R2021

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ASME B29.26 – 2013(R2021) Fatigue Testing Power Transmission Roller Chain

Published By	Publication Date	Number of Pages
ASME	2013	32

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Description

This Standard covers fatigue testing, in axial tension, of power transmission roller chains in ASME B29.1M and ASME B29.3M, and nonstandard variants of those chains. The purpose of this Standard is to provide a uniform, reliable method of determining the fatigue strength of power transmission roller chains so that equivalent and comparable results can be obtained from axial fatigue testing at different laboratories.

PDF Catalog

PDF Pages	PDF Title
5	CONTENTS
6	FOREWORD
7	COMMITTEE ROSTER
8	CORRESPONDENCE WITH THE B29 COMMITTEE
9	1 SCOPE 2 PURPOSE 3 DEFINITIONS AND NOMENCLATURE 4 REFERENCES
10	5 TESTING EQUIPMENT 5.1 Testing Machine Type and Size 5.1.1 Machine Type. 5.1.2 Machine Size. 5.2 Load Application 5.2.1 Load Form. 5.2.2 Loading Frequency. 5.3 Load Calibration and Verification 5.3.1 Machine Calibration. 5.3.2 Load Verification 5.4 Additional Machine Requirements 5.5 Test Fixtures 5.5.1 Flexibility. 5.5.2 Axial Loading. 5.5.3 Connection. 6 TEST CHAINS 6.1 Condition 6.2 Length
11	Figures Fig. 1 Typical Load Cycle Fig. 2 Typical Single-Strand Roller Chain Fatigue Test Specimens and Fixtures
12	Fig. 3 Typical Double-Strand Roller Chain Fatigue Test Specimens and Fixtures Fig. 4 Typical Leaf Chain Fatigue Test Specimens and Fixtures
14	8.3 Staircase Test 8.3.1 Purpose. 8.3.2 Description. 8.3.3 Endurance. 8.3.4 Step Size 8.3.5 Selecting the Initial Major Load. Fig. 6 Johnson-Goodman Diagram
15	8.3.6 Required Number of Tests. 8.3.7 Rules for Conducting Staircase Tests 9 ANALYZING FATIGUE TESTING DATA 9.1 Analyzing Finite Life Test Data 9.1.1 Data. 9.1.2 Statistical Distributions. 9.1.3 Determining Force — Life F-N Lines 9.1.3.1 General Relationships. 9.1.3.2 Mean Regression Line 9.1.3.3 Minimum Regression Line Table Table 1 Required Number of Data Points
16	9.2 Analyzing Staircase Test Data 9.2.1 Calculate Test Loads Correct Major Loads to Zero Minor Load. 9.2.2 Plot Staircase Test Data 9.2.3 Calculate Mean Fatigue Strength. 9.2.4 Calculate Standard Deviation. 9.2.5 Calculate Fatigue Limit or Minimum Fatigue Strength. 9.2.6 Extrapolating Minimum Fatigue Strength to 10 sup.7 Cycles 10 PRESENTATION OF TEST RESULTS 10.1 Test Chain Information 10.1.1 Identification. Fig. 7 Staircase Data Plot
17	10.1.2 Mechanical Properties. 10.2 Test Equipment and Procedures 10.2.1 Test Equipment. 10.2.2 Test Procedures. 10.3 Test Results 10.3.1 Final Results of Staircase Tests. 10.3.2 Final Results of Endurance Tests. 10.3.3 Tabular Presentation of Test Results. 10.3.4 Graphical Presentation of Test Results.
18	Fig. 8 Typical Fatigue Test Data Plot
19	NONMANDATORY APPENDIX A SURVIVAL METHOD WITH ABRIDGED PROBIT ANALYSIS A-1 PURPOSE A-2 DESCRIPTION A-3 TEST PROCEDURE A-3.1 Test Specimens A-3.2 Endurance A-3.3 Load Levels A-3.4 Testing A-4 ANALYSIS PROCEDURE A-4.1 General A-4.2 Distributions
20	A-4.3 Standard Deviation A-4.4 Mean Fatigue Limit A-5 STEP SIZE A-6 EXAMPLE
22	NONMANDATORY APPENDIX B ADDITIONAL “PHANTOM” DATA POINTS B-1 PHANTOM POINT AT THE BEGINNING OF THE STAIRCASE B-2 PHANTOM POINT AFTER THE FINAL TEST IN THE STAIRCASE
23	NONMANDATORY APPENDIX C ADDING ONE STEP TO THE MINIMUM FATIGUE STRENGTH C-1 BASIC CALCULATED MINIMUM C-2 ADJUSTED MINIMUM
24	NONMANDATORY APPENDIX D ADJUSTING LABORATORY FATIGUE STRENGTH FOR APPLICATIONS D-1 INTRODUCTION D-2 SCOPE D-3 METHODS D-3.1 Chain Length
26	D-3.2 Sample Size D-3.3 Sample Representativeness D-4 OTHER FACTORS D-4.1 Statistical Limits D-4.2 Fatigue Life D-4.3 Wear D-4.4 Unidentified Factors D-5 SAMPLE CALCULATIONS
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