ISO 1099:2017
Metallic materials — Fatigue testing — Axial force-controlled method
ISO 1099:2017 specifies the conditions for conducting axial, constant-amplitude, force-controlled, fatigue tests at ambient temperature on metallic specimens, without deliberately introduced stress concentrations. The object of testing while employing this document is to provide fatigue information, such as the relation between applied stress and number of cycles to failure for a given material condition, such as hardness and microstructure, at various stress ratios.
While the form, preparation and testing of specimens of circular and rectangular cross-section are described, component testing and other specialized forms of testing are not included in this document.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test plan
4.1 General outline
4.2 Presentation of fatigue results
4.2.1 General
4.2.2 Wöhler or S-N curve
4.2.3 Mean stress diagrams
5 Shape and size of specimen
5.1 Form of specimens
5.2 Specimen temperature measurement
6 Geometry
6.1 Bars and flat sheets >5 mm thick
6.2 Flat sheets
6.2.1 General
6.2.2 Thicknesses between 5 mm and 2,5 mm
6.2.3 Thicknesses 2,5 mm
6.3 Preparation of specimens
6.3.1 Machining procedure
6.3.2 Sampling and marking
6.3.3 Surface condition of the specimen
6.3.4 Dimensional checks
6.3.5 Storage and handling
7 Apparatus
7.1 Test machine
7.2 Alignment check
7.3 Force transducer
7.4 Gripping of specimen
8 Instrumentation for test monitoring
8.1 Recording systems
8.2 Cycle counter
9 Checking and verification
10 Mounting of specimen
11 Rate of testing
12 Application of force
13 Recording of temperature and humidity
14 Criterion of failure and test termination
14.1 Criterion of failure
14.2 Test termination
15 Test report
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test plan
4.1 General outline
4.2 Presentation of fatigue results
4.2.1 General
4.2.2 Wöhler or S-N curve
4.2.3 Mean stress diagrams
5 Shape and size of specimen
5.1 Form of specimens
5.2 Specimen temperature measurement
6 Geometry
6.1 Bars and flat sheets >5 mm thick
6.2 Flat sheets
6.2.1 General
6.2.2 Thicknesses between 5 mm and 2,5 mm
6.2.3 Thicknesses 2,5 mm
6.3 Preparation of specimens
6.3.1 Machining procedure
6.3.2 Sampling and marking
6.3.3 Surface condition of the specimen
6.3.4 Dimensional checks
6.3.5 Storage and handling
7 Apparatus
7.1 Test machine
7.2 Alignment check
7.3 Force transducer
7.4 Gripping of specimen
8 Instrumentation for test monitoring
8.1 Recording systems
8.2 Cycle counter
9 Checking and verification
10 Mounting of specimen
11 Rate of testing
12 Application of force
13 Recording of temperature and humidity
14 Criterion of failure and test termination
14.1 Criterion of failure
14.2 Test termination
15 Test report
Bibliography