BS-903-A4-1990 ISO-7743-1989.pdf
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1、BRITISH STANDARD BS 903-A4: 1990 ISO 7743: 1989 Incorporating Amendment No. 1 Method for Physical testing of rubber Part A4: Determination of compression stress-strain properties Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:50:15 GMT+00:00 2006, Uncontroll
2、ed Copy, (c) BSI BS 903-A4:1990 This British Standard, having been prepared under the direction of the Rubber Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 27 July 1990 BSI 12-1999 The following BSI references relate to the work on this st
3、andard: Committee reference RUM/36 Draft for comment 84/44630 DC ISBN 0 580 18807 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Rubber Standards Policy Committee (RUM/-) to Technical Committee RUM/36, upon which the following bodies
4、were represented: British Railways Board British Rubber Manufacturers Association ERA Technology Ltd. GAMBICA (BEAMA Ltd.) Institution of Mechanical Engineers Institution of Water Engineers and Scientists Malaysian Rubber Producers Research Association Ministry of Defence National College of Rubber
5、Technology Rubber and Plastics Research Association of Great Britain SATRA Footwear Technology Centre Amendments issued since publication Amd. No.DateComments 6741September 1991 Indicated by a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Fri Dec 0
6、8 04:50:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 903-A4:1990 BSI 12-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Definitions1 4Principle1 5Apparatus and materials1 6Test pieces2 7Number of test pieces2 8Time-lapse between vu
7、lcanization and testing2 9Conditioning2 10Temperature of test2 11Procedure2 12Expression of results3 13Test report3 Annex A (informative) Extrapolation of results to non-standard test pieces5 Figure 1 Calculation of compression modulus4 Publications referred toInside back cover Licensed Copy: London
8、 South Bank University, London South Bank University, Fri Dec 08 04:50:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 903-A4:1990 ii BSI 12-1999 National foreword This Part of BS 903, which has been prepared under the direction of the Rubber Standards Policy Committee, is identical with ISO 7743:1
9、989 “Rubber, vulcanized or thermoplastic Determination of compression stress-strain properties” including Technical Corrigendum No. 1, published by the International Organization for Standardization (ISO). The Technical Committee has reviewed the provisions of ISO 468 and ISO 1826, and has decided t
10、hat they are acceptable for use in conjunction with this standard. A related British Standard to ISO 468 is BS 1134 “Assessment of surface texture” Part 1:1988 “Methods and instrumentation” and Part 2:1972 “General information and guidance”. A related British Standard to ISO 1826 is BS 903 “Methods
11、of testing vulcanized rubber” Part A19:1986 “Heat resistance and accelerated ageing tests”. Additional information. In the UK, the “standard temperature” (see clauses 9 and 10) is 23 2 C. NOTEThe “standard temperature” is commonly referred to as the “standard laboratory temperature”. A British Stand
12、ard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International StandardCorresponding Bri
13、tish Standard BS 903 Methods of testing vulcanized rubber ISO 471:1983Part A35:1985 Temperatures, humidities and times for conditioning and testing of test pieces (Identical) ISO 3383:1985Part A32:1988 General directions for achieving elevated or subnormal temperatures for test purposes (Identical)
14、ISO 4648:1978Part A38:1978 Determination of dimensions of test pieces and products for test purposes (Identical) ISO 4661-1:1986Part A36:1988 Preparation of samples and test pieces (Identical) ISO 5893:1985BS 5214 Specification for testing machines for rubbers and plastics Part 1:1975 Constant rate
15、of traverse machines (Technically equivalent) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be
16、 indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:50:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 903-A4:1990 BSI 12-19991 1 Scope This International Standard specifies a method for the determinat
17、ion of the compression stress-strain properties of vulcanized or thermoplastic rubber, using a specified test piece. Two procedures are given: A: With the metal plates, through which the compressive force is applied, lubricated. B: With the metal plates, through which the compressive force is applie
18、d, bonded to the test piece. The two procedures do not give the same results. With lubricated test pieces, the results are dependent only on the modulus of the rubber and are independent of the test piece shape, provided that complete slip conditions are achieved. Effective lubrication is sometimes
19、difficult to achieve and it is prudent to inspect the variance in the test results from replicate test pieces for indications of erratic slip conditions. With bonded test pieces, the results are dependent on both the modulus of the rubber and the test piece shape. The dependence on test piece shape
20、is strong and consequently the results will be markedly different from those obtained with lubricated test pieces. Provision is made for the use of test pieces of different size and/or shape from the specified test piece but extrapolation of the results obtained to other sizes and shapes may not be
21、possible. Guidance on the effect of size and shape of test piece and of bonding or lubricating is given in Annex A. The method is not suitable for materials that exhibit high set. 2 Normative references The following standards contain provisions which, through reference in this text, constitute prov
22、isions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standa
23、rds listed below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 468:1982, Surface roughness Parameters, their values and general rules for specifying requirements. ISO 471:1983, Rubber Standard temperatures, humidities and times for the conditioning and te
24、sting of test pieces. ISO 1826:1981, Rubber, vulcanized Time-interval between vulcanization and testing Specification. ISO 3383:1985, Rubber General directions for achieving elevated or subnormal temperatures for test purposes. ISO 4648:1978, Rubber, vulcanized Determination of dimensions of test pi
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