ASTM_D_5379_-_D_5379M_-_19e1.pdf

Designation:D5379/D5379M191Standard Test Method forShear Properties of Composite Materials by the V-NotchedBeam Method1This standard is issued under the fixed designation D5379/D5379M;the number immediately following the designation indicates theyear of original adoption or,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.1NOTEEditorial corrections were made to the adjunct information in March 2021.1.Scope1.1 This test method covers the shear properties of compos-ite materials reinforced by high-modulus fibers.The compositematerials are limited to continuous-fiber or discontinuous-fiber-reinforced composites in the following material forms:1.1.1 Laminates composed only of unidirectional fibrouslaminae,with the fiber direction oriented either parallel orperpendicular to the loading axis.1.1.2 Laminates composed only of woven fabric filamentarylaminae with the warp direction oriented either parallel orperpendicular to the loading axis.1.1.3 Laminates composed only of unidirectional fibrouslaminae,containing equal numbers of plies oriented at 0 and90 in a balanced and symmetric stacking sequence,with the 0direction oriented either parallel or perpendicular to the loadingaxis.1.1.4 Short-fiber-reinforced composites with a majority ofthe fibers being randomly distributed.NOTE1This shear test concept was originally developed withoutreference to fiber direction for use on isotropic materials such as metals orceramics.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system are not necessarily exact equivalents;therefore,toensure conformance with the standard,each system shall beused independently of the other,and values from the twosystems shall not be combined.1.2.1 Within the text,the inch-pound units are shown inbrackets.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D792 Test Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by DisplacementD883 Terminology Relating to PlasticsD2584 Test Method for Ignition Loss of Cured ReinforcedResinsD2734 Test Methods for Void Content of Reinforced PlasticsD3171 Test Methods for Constituent Content of CompositeMaterialsD3878 Terminology for Composite MaterialsD5229/D5229M Test Method for MoistureAbsorption Prop-erties and Equilibrium Conditioning of Polymer MatrixComposite MaterialsE4 Practices for Force Verification of Testing MachinesE6 Terminology Relating to Methods of Mechanical TestingE111 Test Method for Youngs Modulus,Tangent Modulus,and Chord ModulusE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or ProcessE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE251 Test Methods for Performance Characteristics of Me-tallic Bonded Resistance Strain GagesE456 Terminology Relating to Quality and StatisticsE1237 Guide for Installing Bonded Resistance Strain Gages1This test method is under the jurisdiction of ASTM Committee D30 onComposite Materials and is the direct responsibility of Subcommittee D30.04 onLamina and Laminate Test Methods.Current edition approved Oct.15,2019.Published October 2019.Originallyapproved in 1993.Last previous edition approved in 2012 as D5379/D5379M 12.DOI:10.1520/D5379_D5379M-19E01.2For referenced 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.12.2 Other Documents:3ANSI Y14.5M-1982 Geometric Dimensioning and Toler-ancingANSI/ASMEB46.1-1985 Surface Texture(SurfaceRoughness,Waviness,and Lay)2.3 ASTM Adjuncts:V-Notched Beam Shear Fixture Machining Drawings43.Terminology3.1 DefinitionsTerminology D3878 defines terms relatingto high