ASTM_D_6507_-_19.pdf

Designation:D650719Standard Practice forFiber Reinforcement Orientation Codes for CompositeMaterials1This standard is issued under the fixed designation D6507;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last 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 Thispracticeestablishesorientationcodesforcontinuous-fiber-reinforced composite materials.Orientationcodes are explicitly provided for two-dimensional laminatesand braids.The laminate code may also be used for filament-wound materials.Amethod is included for presenting subscriptinformation in computerized formats that do not permit sub-script notation.1.2 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.1.3 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:2D3518/D3518M Test Method for In-Plane Shear Responseof Polymer Matrix Composite Materials by Tensile Test ofa 645 LaminateD3878 Terminology for Composite Materials2.2 Other Documents:CMH-17-2G,Polymer Matrix Composites,Volume 2 Ma-terials Properties,Section 1.6.13ISO 1268-1 Fibre-reinforced PlasticsMethods of Produc-ing Test PlatesPart 1:General Conditions,AnnexStacking Designation Systems43.Terminology3.1 DefinitionsDefinitions in accordance with Terminol-ogy D3878 shall be used where applicable.4.Significance and Use4.1 The purpose of a laminate orientation code is to providea simple,easily understood method of describing the lay-up ofa laminate.The laminate orientation code is based largely on acombination of industry practice and the codes used in theNASA/DOD Advanced Composites Design Guide,5CMH-17-2G,and ISO 1268-1.4.2 The braiding orientation code provides similar informa-tion for a two-dimensional braid,based largely on StandardTest Methods for Textile Composites.65.Reference Systems5.1 A set of reference coordinate axes and associatedreference plane and direction are selected before writing theorientation code.5.1.1 The reference plane is selected as the bottom or toplayer for the laminate orientation code.The orientation code isthen determined by progressing through the laminate thickness.For a laminate symmetric about its midplane,the orientationcode using the top layer as the reference plane is identical tothe orientation code using the bottom layer as the referenceplane.5.1.2 The reference direction,from which ply orientation ismeasured,is somewhat arbitrarily selected for convenience andrelevance to the application.Often,a dominant fiber direction,such as that aligned with the laminate principal axis,is definedto be 0.An example in which relevance to testing determinesthe reference direction is the Test Method D3518/D3518M1This practice is under the jurisdiction of ASTM Committee D30 on CompositeMaterials and is the direct responsibility of Subcommittee D30.01 on Editorial andResource Standards.Current edition approved Oct.15,2019.Published November 2019.Originallyapproved in 2000.Last previous edition approved in 2016 as D6507 16.DOI:10.1520/D6507-19.2For 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.3Available from SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096,http:/www.sae.org.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.5NASA/DOD Advanced Composites Design Guide,Vol.4,Section 4.0.5,AirForce Wright Aeronautical Laboratories,Day,OH,prepared by Rockwell Interna-tional Corp.,1983(distribution limited).6Masters,J.E.,and Portanova,M.A.,Standard Test Methods for TextileComposites,NASA CR-4751,NASA Langley Research Center,1996.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.1 in-plane shear specimen configuration for which the loadingdirection is selected as 0.5.2 This set of reference coordinate axes and associa