1、BSI Standards PublicationBS EN ISO 13934-2:2014Textiles Tensile properties offabricsPart 2: Determination of maximum forceusing the grab methodBS EN ISO 13934-2:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO13934-2:2014. It supersedes BS EN ISO 13934-2
2、:1999 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee TCI/24, Physical testing of textiles.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprov
3、isions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 76993 1ICS 59.080.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published
4、 under the authority of theStandards Policy and Strategy Committee on 28 February 2014.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 13934-2 February 2014 ICS 59.080.30 Supersedes EN ISO 13934-2:1999English Version Textiles - Tensile pr
5、operties of fabrics - Part 2: Determination of maximum force using the grab method (ISO 13934-2:2014) Textiles - Proprits des toffes en traction - Partie 2: Dtermination de la force maximale par la mthode darrachement (Grab test) (ISO 13934-2:2014) Textilien - Zugeigenschaften von textilen Flchengeb
6、ilden -Teil 2: Bestimmung der Hchstzugkraft mit dem Grab-Zugversuch (ISO 13934-2:2014) This European Standard was approved by CEN on 30 December 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status
7、 of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, Germ
8、an). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia
9、, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and Unit
10、ed Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN
11、ISO 13934-2:2014 EBS EN ISO 13934-2:2014EN ISO 13934-2:2014 (E) 3 Foreword This document (EN ISO 13934-2:2014) has been prepared by Technical Committee ISO/TC 38 “Textiles” in collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the secretariat of which is held by BSI. T
12、his European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2014, and conflicting national standards shall be withdrawn at the latest by August 2014. Attention is drawn to the possibility that some of t
13、he elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 13934-2:1999. According to the CEN-CENELEC Internal Regulations, the national standards organizations of t
14、he following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Nether
15、lands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 13934-2:2014 has been approved by CEN as EN ISO 13934-2:2014 without any modification. BS EN ISO 13934-2:2014ISO 13934-2:2014(E) ISO 2014 All ri
16、ghts reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 25 Sampling 26 Apparatus . 27 Atmosphere for conditioning and testing 38 Preparation of test specimens 38.1 General . 38.2 Dimensions . 48.3 Preparation of test specimens
17、. 48.4 Wet test specimens 49 Procedure. 49.1 Gauge length 49.2 Rate of extension . 49.3 Mounting of test specimens . 49.4 Operation . 49.5 Tests on wet test specimens 510 Calculation and expression of results . 511 Test report . 5Annex A (informative) Suggested procedure for sampling . 6Annex B (inf
18、ormative) Locations of test specimens cut from a laboratory sample . 7Annex C (informative) Arrangements of jaws for the grab test 8Bibliography 9BS EN ISO 13934-2:2014ISO 13934-2:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards
19、bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizat
20、ions, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its furth
21、er maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directive
22、s).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Intr
23、oduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to c
24、onformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 38, Textiles, Subcommittee SC 24, Conditioning atmospheres
25、 and physical tests for textile fabrics.This second edition cancels and replaces the first edition (ISO 13934-2: 1999), of which it constitutes a minor revision.ISO 13934 consists of the following parts, under the general title Textiles Tensile properties of fabrics: Part 1: Determination of maximum
26、 force and elongation at maximum force using the strip method Part 2: Determination of maximum force using the grab methodiv ISO 2014 All rights reservedBS EN ISO 13934-2:2014ISO 13934-2:2014(E)IntroductionThis part of ISO 13934 has been prepared in the context of several test methods for determinat
27、ion of certain mechanical properties of textiles using mainly tensile testing machines, e.g. tensile properties, seam tensile properties, tear properties, and seam slippage. The procedure for these standards agrees where appropriate. The results obtained by one of the methods should not be compared
28、with those obtained by the other methods. ISO 2014 All rights reserved vBS EN ISO 13934-2:2014BS EN ISO 13934-2:2014Textiles Tensile properties of fabrics Part 2: Determination of maximum force using the grab method1 ScopeThis part of ISO 13934 specifies a procedure for the determination of the maxi
29、mum force of textile fabrics known as the grab test.NOTE ISO 13934-1 describes the method known as the strip test.The method is mainly applicable to woven textile fabrics including fabrics which exhibit stretch characteristics imparted by the presence of an elastomeric fibre and mechanical or chemic
30、al treatment. It can be applicable to fabrics produced by other techniques. It is not normally applicable to geotextiles, nonwovens, coated fabrics, textile-glass woven fabrics, and fabrics made from carbon fibres or polyolefin tape yarns.The method specifies the determination of the maximum force o
31、f test specimens in equilibrium with the standard atmosphere for testing and of test specimens in the wet state.The method is restricted to the use of constant-rate-of-extension (CRE) testing machines.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in t
32、his document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 139, Textiles Standard atmospheres for conditioning and testingISO 3696, Water fo
33、r analytical laboratory use Specification and test methodsISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring systemISO 10012-1, Quality assurance requirements for measuring e
34、quipment Part 1: Metrological confirmation system for measuring equipment3 Terms and definitionsFor the purposes of this document, the terms and definitions in ISO 13934 and the following apply.3.1constant-rate-of-extension (CRE) testing machinetensile-testing machine provided with one clamp which i
35、s stationary and another clamp which moves with a constant speed throughout the test, the entire testing system being virtually free from deflectionSOURCE: ISO 13934-1:2013, 3.13.2grab testtensile test in which only the centre part of the test specimen is gripped in the jaws of the testing machineIN
36、TERNATIONAL STANDARD ISO 13934-2:2014(E) ISO 2014 All rights reserved 1BS EN ISO 13934-2:2014ISO 13934-2:2014(E)3.3maximum forcemaximum force recorded when a test specimen is taken to rupture during a test under the specified conditionsSOURCE: ISO 13934-1:2013, 3.113.4gauge lengthdistance between th
37、e two effective clamping points of a testing deviceNote 1 to entry: The effective clamping points (or lines) of jaws can be checked by clamping a test specimen with carbon copy paper to produce a gripping pattern on the test specimen and/or the jaw faces.SOURCE: ISO 13934-1:2013, 3.3, modified “unde
38、r defined pretension” has been removed from the Note.4 PrincipleA fabric test specimen, gripped in its centre part by jaws of specified dimensions, is extended at constant rate until it ruptures. The maximum force is recorded.5 SamplingSelect samples either in accordance with the procedure laid down
39、 in the material specification for the fabric or as agreed between the interested parties.In the absence of an appropriate material specification, the example of a suitable sampling procedure given in Annex A can be used.An example of a suitable pattern for cutting test specimens from the laboratory
40、 sample is given in Annex B. Avoid test specimens with folded or creased areas, selvedges, and areas not representative of the fabric.6 Apparatus6.1 CRE machineThe metrological confirmation system of the tensile-testing machine shall be in accordance with ISO 10012-1.The constant-rate-of-extension (
41、CRE) machine shall have the general characteristics given in 6.1.1 to 6.1.6.6.1.1 The tensile-testing machine shall be provided with means for indicating or recording the force applied to the test specimen in stretching it to rupture. Under conditions of use, the accuracy of the apparatus shall be c
42、lass 1 of ISO 7500-1. The error of the indicated or recorded maximum force at any point in the range in which the machine is used shall not exceed 1 %.6.1.2 If a class 2 tensile-testing machine according to ISO 7500-1 is to be used, this shall be stated in the test report.6.1.3 If recording of force
43、 is obtained by means of data acquisition boards and software, the frequency of data collection shall be at least eight per second.6.1.4 The machine shall be capable of a constant rate of extension of 50 mm/min, with an accuracy of 10 %.2 ISO 2014 All rights reservedBS EN ISO 13934-2:2014ISO 13934-2
44、:2014(E)6.1.5 The machine shall be capable of setting the gauge length to 100 mm or, if agreed, to 75 mm, to within 1 mm.6.1.6 The clamping device of the machine shall be positioned with the central point of the two jaws in the line of applied force, the front edges shall be at right angles to the l
45、ine of applied force and their clamping faces shall be in the same plane.The jaws shall be capable of holding the test specimen without allowing it to slip and designed so that they do not cut or otherwise weaken the test specimen.The faces of the jaws shall be smooth and flat, except that when, eve
46、n with packing, the test specimen cannot be held satisfactorily with flat-faced jaws, engraved or corrugated jaws can be used to prevent slippage. Other auxiliary materials for use with either smooth or corrugated jaws to improve specimen gripping include paper, leather, plastics, or rubber.For the
47、grab test, the dimensional clamping area of the fabric shall be 25 mm 1 mm 25 mm 1 mm. This area can be achieved by either method a) or method b) described below and illustrated in Annex C.a) One clamp, 25 mm 40 mm minimum, preferably 50 mm, positioned with the wider direction of the clamp perpendic
48、ular to the line of application of the force; a second clamp of the same dimensions positioned perpendicular to the first so that the wider direction of the clamp is parallel to the direction of application of the force.b) One clamp, 25 mm 40 mm minimum, preferably 50 mm, positioned with the wider d
49、irection of the clamp perpendicular to the line of application of the force; a second clamp, 25 mm 25 mm.6.2 Equipment, for cutting test specimens.6.3 Equipment, in which test specimens can be immersed in water preparatory to wet testing.6.4 Grade 3 water, in accordance with ISO 3696 for wetting test specimens.6.5 Non-ionic wetting agent.7 Atmosphere for conditioning and testingThe atmosphere for preconditioning, conditioning, and testing shall be as specified in ISO 139.It is recommended that samples be conditioned
