ISO 23838:2022
Metallic materials — High strain rate torsion test at room temperature
This document specifies terms and definitions, symbols and designations, principle, apparatus, test piece, procedure, data processing, evaluation of test result, test report and other contents for the torsion test at high strain rates for metallic materials by using torsional split Hopkinson bar (TSHB).
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and designations
5 Principle
6 Apparatus
6.1 Apparatus components
6.2 Loading device
6.3 Bar components
6.4 Data acquisition and recording system
7 Test piece
7.1 Dimensions of test piece
7.2 Measurement of test piece dimensions
8 Procedure
8.1 Calibration of the apparatus
8.2 Recording the temperature of the test environment
8.3 Checking the bar alignment
8.4 Mounting test piece
8.5 Loading
8.6 Measuring and recording
9 Data processing
9.1 Strain on bars
9.2 Waveform processing
9.2.1 Determination of waveform baseline
9.2.2 Determination of starting points of waves
9.2.3 Synchronization of waves
9.2.4 Determination of loading duration of stress wave
9.3 Engineering plastic shear strain rate
9.4 Engineering plastic shear strain
9.5 Engineering plastic shear stress
9.6 Engineering plastic shear stress-shear strain curve
9.7 Average engineering plastic shear strain rate
9.8 Test example
10 Evaluation of test result
11 Test report
Annex A (informative) Torsional split Hopkinson bar
Annex B (informative) Data acquisition and recording system
Annex C (informative) Method for determining the starting points of waves
Annex D (informative) Example of torsional split Hopkinson bar method
Bibliography
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Related Information
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BS 131-1:1961
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and designations
5 Principle
6 Apparatus
6.1 Apparatus components
6.2 Loading device
6.3 Bar components
6.4 Data acquisition and recording system
7 Test piece
7.1 Dimensions of test piece
7.2 Measurement of test piece dimensions
8 Procedure
8.1 Calibration of the apparatus
8.2 Recording the temperature of the test environment
8.3 Checking the bar alignment
8.4 Mounting test piece
8.5 Loading
8.6 Measuring and recording
9 Data processing
9.1 Strain on bars
9.2 Waveform processing
9.2.1 Determination of waveform baseline
9.2.2 Determination of starting points of waves
9.2.3 Synchronization of waves
9.2.4 Determination of loading duration of stress wave
9.3 Engineering plastic shear strain rate
9.4 Engineering plastic shear strain
9.5 Engineering plastic shear stress
9.6 Engineering plastic shear stress-shear strain curve
9.7 Average engineering plastic shear strain rate
9.8 Test example
10 Evaluation of test result
11 Test report
Annex A (informative) Torsional split Hopkinson bar
Annex B (informative) Data acquisition and recording system
Annex C (informative) Method for determining the starting points of waves
Annex D (informative) Example of torsional split Hopkinson bar method
Bibliography