1、Designation:D3518/D3518M13Standard Test Method forIn-Plane Shear Response of Polymer Matrix CompositeMaterials by Tensile Test of a 645 Laminate1This standard is issued under the fixed designation D3518/D3518M;the number immediately following the designation indicates theyear of original adoption or
2、,in the case of revision,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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 T
3、his test method determines the in-plane shear responseof polymer matrix composite materials reinforced by high-modulus fibers.The composite material form is limited to acontinuous-fiber-reinforced composite 645 laminate capableof being tension tested in the laminate x direction.1.2 The values stated
4、 in either SI units or inch-pound unitsare to be regarded separately as standard.Within the text theinch-pound units are shown in brackets.The values stated ineach system are not exact equivalents;therefore,each systemmust be used independently of the other.Combining valuesfrom the two systems may r
5、esult in nonconformance with thestandard.1.3 This standard does not purport to address 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 li
6、mitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD3039/D3039M Test Method for Tensile Properties of Poly-mer Matrix Composite MaterialsD3878 Terminology for Composite MaterialsD5229/D5229M Test Method for MoistureAbsorption Prop-erties and Equilib
7、rium Conditioning of Polymer MatrixComposite MaterialsE6 Terminology Relating to Methods of Mechanical TestingE111 Test Method for Youngs Modulus,Tangent Modulus,and Chord ModulusE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE456 Terminology Relating to Quality and Statist
8、icsE1309 GuideforIdentificationofFiber-ReinforcedPolymer-Matrix Composite Materials in DatabasesE1434 Guide for Recording Mechanical Test Data of Fiber-Reinforced Composite Materials in DatabasesE1471 Guide for Identification of Fibers,Fillers,and CoreMaterials in Computerized Material Property Data
9、bases3.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 testing.Terminology E456 andPractice E177 define terms relating to statistics.In
10、the event ofa conflict between terms,Terminology D3878 shall haveprecedence over the other standards.3.2 Definitions of Terms Specific to This Standard:NOTE1If the term represents a physical quantity,its analyticaldimensions are stated immediately following the term(or letter symbol)infundamental di
11、mension form,using the following ASTM standard sym-bology for fundamental dimensions,shown within square brackets:Mfor mass,L for length,T for time,for thermodynamic temperature,and nd for nondimensional quantities.Use of these symbols is restrictedto analytical dimensions when used with square brac
12、kets,as the symbolsmay have other definitions when used without the brackets.3.2.1 645 laminatein laminated composites,a balanced,symmetric lay-up composed only of+45 plies and 45 plies.(See also ply orientation.)3.2.2 balanced,adjin laminated composites,having,forevery off-axis ply oriented at+,ano
13、ther ply oriented at thatis of the same material system and form.3.2.3 lamina,npl.laminae,in laminated composites,asingle,thin,uniform layer that is the basic building block of alaminate.(Syn.ply).3.2.4 materialcoordinatesystem,ninlaminatedcomposites,a 123 Cartesian coordinate system describing thep
14、rinciple material coordinate system for a laminated material,where the 1-axis is aligned with the ply principal axis,asillustrated in Fig.1.(See also ply orientation,ply principalaxis,and principal material coordinate system.)1This test method is under the jurisdiction of ASTM Committee D30 onCompos
15、ite Materials and is the direct responsibility of Subcommittee D30.04 onLamina and Laminate Test Methods.Current edition approved Aug.1,2013.Published September 2013.Originallyapproved in 1976.Last previous edition approved in 2007 as D3518/D3518M 94(2007).DOI:10.1520/D3518_D3518M-13.2For referenced
16、 ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer 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 3.2.5 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
