BS ISO 3384-2:2019 – TC:2020 Edition
$186.33
Tracked Changes. Rubber, vulcanized or thermoplastic. Determination of stress relaxation in compression – Testing with temperature cycling
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 49 |
This document specifies two methods for determining the decrease in counterforce exerted by a test piece of vulcanized or thermoplastic rubber which has been compressed to a constant deformation and then undergoes temperature cycling.
Method A: The temperature is cycled at intervals between a high temperature for ageing and a low temperature for checking the sealing force at this low temperature.
Method B: The temperature is cycled continuously between a high temperature and a low temperature to introduce thermal stress in the test piece.
The counterforce is determined by means of a continuous-measurement system.
Two forms of test pieces are specified in this document: cylindrical test pieces and rings. Comparison of results is valid only when made on test pieces of similar size and shape.
The use of ring test pieces is particularly suitable for the determination of stress relaxation in liquid environments.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 27 | National foreword |
| 31 | Foreword |
| 32 | Introduction |
| 34 | 1 Scope 2 Normative references 3 Terms and definitions |
| 35 | 4 Principle 5 Apparatus |
| 36 | 5.3 Test environment 6 Calibration 7 Test piece 7.1 Type and preparation of test pieces 7.1.1 General 7.1.2 Cylindrical test pieces |
| 37 | 7.1.3 Ring test pieces 7.2 Measurement of dimensions of test pieces 7.3 Number of test pieces 7.4 Time interval between forming and testing 7.5 Conditioning of test pieces |
| 38 | 8 Duration, temperature and test liquid 8.1 Duration of test 8.2 Temperature of exposure 8.3 Immersion liquids 9 Procedure 9.1 Preparation 9.2 Thickness measurement 9.2.1 Cylindrical test pieces 9.2.2 Ring test pieces |
| 39 | 9.3 Method A |
| 40 | 9.4 Method B |
| 41 | 10 Expression of results |
| 42 | 11 Precision 12 Test report |
| 44 | Annex A(normative) Calibration schedule |
| 47 | Bibliography |
