1、Designation:D6742/D6742M12Standard Practice forFilled-Hole Tension and Compression Testing of PolymerMatrix Composite Laminates1This standard is issued under the fixed designation D6742/D6742M;the number immediately following the designation indicates theyear of original adoption or,in the case of r
2、evision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice provides instructions for modifying open-hole tension and compression test methods to det
3、erminefilled-hole tensile and compressive strengths.The compositematerial forms are limited to continuous-fiber reinforced poly-mer matrix composites in which the laminate is both symmetricand balanced with respect to the test direction.The range ofacceptable test laminates and thicknesses are descr
4、ibed in8.2.1.1.2 This practice supplements Test Methods D5766/D5766M(for tension testing)and D6484/D6484M(for com-pression testing)with provisions for testing specimens thatcontain a close-tolerance fastener or pin installed in the hole.Several important test specimen parameters(for example,fastener
5、 selection,fastener installation method,and fastenerhole tolerance)are not mandated by this practice;however,repeatable results require that these parameters be specified andreported.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stat
6、ed ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.3.1 Within the text the inch-pound units are shown inbrackets.1.4 This standard does not purport to addres
7、s all of thesafety concerns,if any,associated with 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:2D792 Test Methods fo
8、r Density and Specific Gravity(Rela-tive Density)of Plastics by DisplacementD883 Terminology Relating to PlasticsD3171 Test Methods for Constituent Content of CompositeMaterialsD3878 Terminology for Composite MaterialsD5229/D5229M Test Method for MoistureAbsorption Prop-erties and Equilibrium Condit
9、ioning of Polymer MatrixComposite MaterialsD5766/D5766M Test Method for Open-Hole TensileStrength of Polymer Matrix Composite LaminatesD6484/D6484M Test Method for Open-Hole CompressiveStrength of Polymer Matrix Composite LaminatesD6507 Practice for Fiber Reinforcement Orientation Codesfor Composite
10、 MaterialsE6 Terminology Relating to Methods of Mechanical TestingE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE456 Terminology Relating to Quality and StatisticsE1309 GuideforIdentificationofFiber-ReinforcedPolymer-Matrix Composite Materials in DatabasesE1434 Guide for R
11、ecording Mechanical Test Data of Fiber-Reinforced Composite Materials in Databases3.Terminology3.1 DefinitionsTerminology D3878 defines terms relatingto high-modulus fibers and their composites.TerminologyD883 defines terms relating to plastics.Terminology E6 definesterms relating to mechanical test
12、ing.Terminology E456 andPractice E177 define terms relating to statistics.In the event ofa conflict between terms,Terminology D3878 shall haveprecedence over the other standards.1This practice is under the jurisdiction of ASTM Committee D30 on CompositeMaterials,and is the direct responsibility of S
13、ubcommittee D30.05 on StructuralTest Methods.Current edition approved April 1,2012.Published May 2012.Originallyapproved in 2001.Last previous edition approved in 2007 as D6742/D6742M 07.DOI:10.1520/D6742_D6742M-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Cus
14、tomer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2 Definitions of Terms Specific to This
15、 Standard:NOTE1If the term represents a physical quantity,its analyticaldimensions are stated immediately following the term(or letter symbol)infundamental dimension form,using the following ASTM Internationalstandard symbology for fundamental dimensions,shown within squarebrackets:M for mass,L for
16、length,T for time,for thermodynamictemperature,and nd for nondimensional quantities.Use of these symbolsis restricted to analytical dimensions when used with square brackets,asthe symbols may have other definitions when used without the brackets.3.2.1 nominal value,na value,existing in name only,assigned to a measurable property for the purpose of conve-nient designation.Tolerances may be applied to a nominalvalue to define an acceptable range for the property.3.2.2 countersink flushness,ndepth