ISO 12107:2012
Metallic materials — Fatigue testing — Statistical planning and analysis of data
ISO 12107:2012 presents methods for the experimental planning of fatigue testing and the statistical analysis of the resulting data. The purpose is to determine the fatigue properties of metallic materials with both a high degree of confidence and a practical number of specimens.
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CVP_Secretariat_Loca
Foreword
Introduction
1 Scope
1.1 Objectives
1.2 Fatigue properties to be analysed
1.3 Limit of application
2 Normative references
3 Terms and definitions
3.1 Terms related to statistics
3.2 Terms related to fatigue
4 Statistical distributions in fatigue properties
4.1 Concept of distributions in fatigue
4.2 Distribution of fatigue life
4.3 Distribution of fatigue strength
5 Statistical planning of fatigue tests
5.1 Sampling
5.2 Allocation of specimens for testing
6 Statistical estimation of fatigue life at a given stress
6.1 Testing to obtain fatigue life data
6.2 Plotting data on normal probability paper
6.3 Estimating distribution parameters
6.4 Quantitative evaluation of the assumption of normality
6.5 Estimating the lower limit of the fatigue life
7 Statistical estimation of fatigue strength at a given fatigue life
7.1 Testing to obtain fatigue strength data
7.2 Statistical analysis of test data
7.3 Estimating the lower limit of the fatigue strength
7.4 Modified method when standard deviation is known
8 Statistical estimation of the S-N curve
8.1 Introduction
8.2 Estimation of regression parameters
8.3 Analysis approach
8.4 Calculation of the lower tolerance limit
8.5 Experimental plan for the development of S-N curves
9 Test report
9.1 Presentation of test results
9.2 Fatigue strength at a given life
9.3 S-N curve
Annex A (informative) Examples of applications
Annex B (informative) Statistical tables
Bibliography
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CVP_Secretariat_Loca
Foreword
Introduction
1 Scope
1.1 Objectives
1.2 Fatigue properties to be analysed
1.3 Limit of application
2 Normative references
3 Terms and definitions
3.1 Terms related to statistics
3.2 Terms related to fatigue
4 Statistical distributions in fatigue properties
4.1 Concept of distributions in fatigue
4.2 Distribution of fatigue life
4.3 Distribution of fatigue strength
5 Statistical planning of fatigue tests
5.1 Sampling
5.2 Allocation of specimens for testing
6 Statistical estimation of fatigue life at a given stress
6.1 Testing to obtain fatigue life data
6.2 Plotting data on normal probability paper
6.3 Estimating distribution parameters
6.4 Quantitative evaluation of the assumption of normality
6.5 Estimating the lower limit of the fatigue life
7 Statistical estimation of fatigue strength at a given fatigue life
7.1 Testing to obtain fatigue strength data
7.2 Statistical analysis of test data
7.3 Estimating the lower limit of the fatigue strength
7.4 Modified method when standard deviation is known
8 Statistical estimation of the S-N curve
8.1 Introduction
8.2 Estimation of regression parameters
8.3 Analysis approach
8.4 Calculation of the lower tolerance limit
8.5 Experimental plan for the development of S-N curves
9 Test report
9.1 Presentation of test results
9.2 Fatigue strength at a given life
9.3 S-N curve
Annex A (informative) Examples of applications
Annex B (informative) Statistical tables
Bibliography