ASTM_D_7136_-_D_7136M_-_20.pdf

Designation:D7136/D7136M20Standard Test Method forMeasuring the Damage Resistance of a Fiber-ReinforcedPolymer Matrix Composite to a Drop-Weight Impact Event1This standard is issued under the fixed designation D7136/D7136M;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.1.Scope1.1 This test method determines the damage resistance ofmultidirectional polymer matrix composite laminated platessubjected to a drop-weight impact event.The compositematerial forms are limited to continuous-fiber reinforced poly-mer matrix composites,with the range of acceptable testlaminates and thicknesses defined in 8.2.1.1.1 Instructions for modifying these procedures to deter-mine damage resistance properties of sandwich constructionsare provided in Practice D7766/D7766M.1.2 A flat,rectangular composite plate is subjected to anout-of-plane,concentrated impact using a drop-weight devicewith a hemispherical impactor.The potential energy of thedrop-weight,as defined by the mass and drop height of theimpactor,is specified prior to test.Equipment and proceduresare provided for optional measurement of contact force andvelocity during the impact event.The damage resistance isquantified in terms of the resulting size and type of damage inthe specimen.1.3 The test method may be used to screen materials fordamage resistance,or to inflict damage into a specimen forsubsequent damage tolerance testing.When the impacted plateis tested in accordance with Test Method D7137/D7137M,theoverall test sequence is commonly referred to as the Compres-sion After Impact(CAI)method.Quasi-static indentation perTest Method D6264/D6264M may be used as an alternatemethod of creating damage from an out-of-plane force andmeasuring damage resistance properties.1.4 The damage resistance properties generated by this testmethod are highly dependent upon several factors,whichinclude specimen geometry,layup,impactor geometry,impac-tor mass,impact force,impact energy,and boundary condi-tions.Thus,results are generally not scalable to otherconfigurations,and are particular to the combination of geo-metric and physical conditions tested.1.5 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard.Thevalues stated in each system are not necessarily exact equiva-lents;therefore,to ensure conformance with the standard,eachsystem shall be used independently of the other,and valuesfrom the two systems shall not be combined.1.5.1 Within the text,the inch-pound units are shown inbrackets.1.6 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.1.7 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 CompositeMaterialsD3763 Test Method for High Speed Puncture Properties ofPlastics Using Load and Displacement SensorsD3878 Terminology for Composite MaterialsD5229/D5229M Test Method for MoistureAbsorption Prop-erties and Equilibrium Conditioning of Polymer MatrixComposite MaterialsD5687/D5687M Guide for Preparation of Flat Composite1This test method is under the jurisdiction of ASTM Committee D30 onComposite Materials and is the direct responsibility of Subcommittee D30.05 onStructural Test Methods.Current edition approved Oct.1,2020.Published November 2020.Originallyapproved in 2005.Last previous edition approved in 2015 as D7136/D7136M 15.DOI:10.1520/D7136_D7136M-20.2For 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 Organizatio