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BS ISO 22407:2021

BS ISO 22407:2021

$142.49

Metallic materials. Fatigue testing. Axial plane bending method

Published By Publication Date Number of Pages
BSI 2021 28
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This document specifies the conditions for conducting the plane bending fatigue test on an axial machine, constant-amplitude, force or displacement controlled, at room temperature (ideally between 10 °C and 35 °C) on metallic specimens, without deliberately introduced stress concentrations. This document does not include the reversed/partially loading test. The purpose of the test is to provide relevant results, such as the relation between applied stress and number of cycles to failure for a given material condition, expressed by hardness and microstructure, at various stress ratios.

Although the shape, preparation and testing of specimens of rectangular and bevelled cross-section are specified, component testing and other specialized forms of testing are not included in this document.

Fatigue tests on notched specimens are not covered by this document since the shape and size of notched test pieces have not been specified in any standard so far. Guidelines are given in Annex A. However, the fatigue-test procedures described in this document can be used for testing such notched specimens.

It is possible for the results of a fatigue test to be affected by atmospheric conditions. Where controlled conditions are required, ISO 554:1976, 2.1 applies.

PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
9 1 Scope
2 Normative references
3 Terms and definitions
12 4 Symbols
4.1 Symbols related to specimen geometry
4.2 Symbols related to testing device
4.3 Symbols related to fatigue test
13 5 Principle of test
6 Test plan
6.1 General outline
7 Specimen
7.1 Shape of specimens
14 7.2 Size of specimen
7.3 Preparation of specimens
7.3.1 General
15 7.3.2 Machining procedure
7.3.3 Sampling and marking
16 7.3.4 Dimensional checks
7.3.5 Storage and handling
8 Apparatus
8.1 Testing machine
8.1.1 Introduction
8.1.2 Force transducer
17 8.1.3 Displacement transducer
8.1.4 Cycle counter
8.1.5 Instrumentation for test monitoring
8.1.6 Anti-rotation system
8.2 Testing device
18 9 Stress calculation
9.1 Introduction
9.2 Rectangular cross-section
9.2.1 Angular corner
9.2.2 Rounded corner
9.3 Bevelled cross-section
19 10 Stress homogeneity check
10.1 Principle
10.2 Measurement method
10.3 Calculations
11 Test procedure
11.1 Mounting of testing device
20 11.2 Mounting of specimen
11.3 Rate of testing
11.4 Application of force or displacement
11.5 Recording of temperature and humidity
11.6 Criterion of failure and test termination
11.6.1 Criterion of failure
21 11.6.2 Test termination
11.7 Test validity
12 Presentation of fatigue results
13 Test report
22 14 Measurement uncertainty
25 Annex A (informative) Fatigue notched specimens
26 Bibliography

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BS ISO 22407:2021
$142.49