ASTM D5034-2008 Standard Test Method for Breaking Strength and Elongation of Textile Fabrics (Grab Test).pdf
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1、Designation: D 5034 08Standard Test Method forBreaking Strength and Elongation of Textile Fabrics (GrabTest)1This standard is issued under the fixed designation D 5034; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of la
2、st revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the grab and modified grab testprocedures for determining the breaking strength and elonga-tion
3、of most textile fabrics. Provisions are made for wet testing.1.1.1 The grab test procedure is applicable to woven,nonwoven, and felted fabrics, while the modified grab testprocedure is used primarily for woven fabrics.1.2 This test method is not recommended for glass fabrics,or for knitted fabrics a
4、nd other textile fabrics which have highstretch (more than 11 %).NOTE 1For the determination of the breaking force and elongation oftextile fabrics using the raveled strip test procedure and the cut strip testprocedure, refer to Test Method D 5035.1.3 This test method provides the values in both inc
5、h-poundunits and SI units. Inch-pound units is the technically correctname for the customary units used in the United States. SI unitsis the technically correct name for the system of metric unitsknown as the International System of Units. The values statedin either acceptable metric units or in oth
6、er units shall beregarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each systemmust be used independently of the other, without combining inany way.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with
7、its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D76 Specification for Tensile Testing Machines for TextilesD 123 Term
8、inology Relating to TextilesD 629 Test Methods for Quantitative Analysis of Textiles3D 1059 Test Method for Yarn Number Based on Short-Length SpecimensD 1776 Practice for Conditioning and Testing TextilesD 5035 Test Method for Breaking Force and Elongation ofTextile Fabrics (Strip Method)D 4850 Term
9、inology Relating to Fabric3. Terminology3.1 For all terminology relating to D13.60, Fabric TestMethods, Specific, refer to Terminology D 4850.3.1.1 The following terms are relevant to this standard:breaking force, braking load, constant-rate-of-extension (CRE)tensile testing machine, constant-rate-o
10、f-traverse (CRT) tensiletesting machine, elongation, extension, grab test modified grabtest, tensile test.3.2 For all other terminology related to textiles, refer toTerminology D 123.4. Summary of Test Method4.1 A 100-mm (4.0-in.) wide specimen is mounted centrallyin clamps of a tensile testing mach
11、ine and a force applied untilthe specimen breaks. Values for the breaking force and theelongation of the test specimen are obtained from machinescales, dials, autographic recording charts, or a computerinterfaced with the testing machine.4.2 This test method describes procedures for carrying outfabr
12、ic grab tensile tests using two types of specimens and threealternative types of testing machines. For reporting, use thefollowing identification system of specific specimen and ma-chine combinations.4.2.1 Type of specimen:4.2.1.1 GGrab4.2.1.2 MGModified grab4.2.2 Type of tensile testing machine:4.2
13、.2.1 EConstant-rate-of-extension (CRE)4.2.2.2 LConstant-rate-of-load (CRL)4.2.2.3 TConstant-rate-of -traverse (CRT)1This test method is under the jurisdiction of ASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.60 on Fabric Test Methods,Specific.Current edition appr
14、oved June 1, 2008. Published July 2008. Replaces GrabTesting sections of Test Method D 1682 90. Originally approved in 1990. Lastprevious edition approved in 2001 as D 503495(2001).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.or
15、g. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.2.3 Possible combinations can be identified as follo
16、ws:Test SpecimenType of TesterConstant-Rate-of-ExtensionConstant-Rate-of-LoadConstant-Rate-of-TraverseGrab G-E G-L G-TModified Grab MG-E MG-L MG-TFor example, Test Method D 5034, G-E refers to a grab test carried out on aconstant rate-of-extension tensile testing machine.5. Significance and Use5.1 T
17、he grab test procedure in this test method for thedetermination of breaking force and elongation is consideredsatisfactory for acceptance testing of commercial shipments ofmost woven or nonwoven textile fabrics, and the modified grabtest procedure is considered satisfactory for acceptance testingof
18、commercial shipments of most woven textile fabrics, sincethe procedures have been used extensively in the trade foracceptance testing.5.1.1 In case of disagreement arising from differences inreported test values when using this test method for acceptancetesting of commercial shipments, the purchaser
19、 and the sup-plier should conduct comparative tests to determine if there isa statistical bias between their laboratories. Competent statis-tical assistance is recommended for the investigation of bias.As a minimum, the two parties should take a group of testspecimens which are as homogeneous as pos
20、sible and whichare from a lot of material of the type in question. The testspecimens should then be randomly assigned in equal numbersto each laboratory for testing. The average results from the twolaboratories should be compared using Students t-test forunpaired data and an acceptable probability l
21、evel chosen by thetwo parties before testing is begun. If a bias is found, either itscause must be found and corrected, or the purchaser and thesupplier must agree to interpret future test results in light of theknown bias.5.2 This test method is not recommended for knitted fabricsbecause of their h
22、igh stretch.5.3 Some modification of technique may be necessary forany fabric having a strength in excess of 200-N/cm (1140-lb/in.) width. Special precautionary measures are provided for usewhen necessary for strong fabrics.5.4 All of the procedures are applicable for testing fabricseither condition
23、ed or wet.5.5 Comparison of results from tensile testing machinesoperating on different principles is not recommended. Whendifferent types of machines are used for comparison testing,constant-time-to-break at 20 6 3 s is the established way ofproducing data. Even then the data may differ significant
24、ly.5.6 Although a constant-rate-of-extension is preferred inthese procedures, in cases of dispute, unless there is agreementto the contrary between the purchaser and the supplier, aconstant-time-to-break (20 6 3 s) is to be used.5.7 The grab test procedure is applicable to the determina-tion of the
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