ISO 20932-2:2018
Textiles — Determination of the elasticity of fabrics — Part 2: Multiaxial tests
This document specifies the test methods which can be used to measure elasticity and related properties of fabrics when they undergo a deformation of their surface. Two methods are specified: a dynamic method (method A) and a static method (method B). This document does not apply to narrow fabrics.
The results obtained cannot be compared. The choice of test method are agreed between parties and indicated in the test report.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Sampling
6 Atmosphere for conditioning and testing
7 Preparation of test specimens
8 Method A — Dynamic test
8.1 Apparatus
8.2 Test specimen preparation
8.3 Procedure for loading test specimen in clamping ring
8.4 Recording
8.5 Expressions and calculations of test results
8.6 Test report
9 Method B — Static test
9.1 Preliminary test
9.1.1 Apparatus
9.1.2 Preparation of test specimens
9.1.3 Procedure
9.2 Actual static test
9.2.1 Apparatus
9.2.2 Selection of testing parameters
9.2.3 Preparation of test specimens
9.2.4 Procedure
9.2.5 Setting of the hemispherical shape
9.2.6 Measurement of the residual deformation
9.2.7 Recording
9.2.8 Expressions and calculations of test results
9.2.9 Test report
Annex A (informative) Example of a typical cycling graph
Annex B (informative) Procedure for sampling
Annex C (informative) Example of a pattern for cutting test specimens from a laboratory sample
Annex D (informative) Method A — Dynamic test equipment
Annex E (informative) Method B — Static test equipment
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Sampling
6 Atmosphere for conditioning and testing
7 Preparation of test specimens
8 Method A — Dynamic test
8.1 Apparatus
8.2 Test specimen preparation
8.3 Procedure for loading test specimen in clamping ring
8.4 Recording
8.5 Expressions and calculations of test results
8.6 Test report
9 Method B — Static test
9.1 Preliminary test
9.1.1 Apparatus
9.1.2 Preparation of test specimens
9.1.3 Procedure
9.2 Actual static test
9.2.1 Apparatus
9.2.2 Selection of testing parameters
9.2.3 Preparation of test specimens
9.2.4 Procedure
9.2.5 Setting of the hemispherical shape
9.2.6 Measurement of the residual deformation
9.2.7 Recording
9.2.8 Expressions and calculations of test results
9.2.9 Test report
Annex A (informative) Example of a typical cycling graph
Annex B (informative) Procedure for sampling
Annex C (informative) Example of a pattern for cutting test specimens from a laboratory sample
Annex D (informative) Method A — Dynamic test equipment
Annex E (informative) Method B — Static test equipment
Bibliography