ASTM_D_7136_-_D_7136M_-_15.pdf

Designation:D7136/D7136M15Standard 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 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated 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.1.5.1 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D792 Test Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by DisplacementD883 Terminology Relating to 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 CompositePanels with Processing Guidelines for Specimen Prepara-tionD6264/D6264M Test Method for Measuring the DamageResistance of a Fiber-Reinforced Polymer-Matrix Com-posite to a Concentrated Quasi-Static Indentation ForceD7137/D7137M Test Method for Compressive ResidualStrength Properties of Damaged Polymer Matrix Compos-ite PlatesD7766/D7766M Practice for Damage Resistance Testing of1This 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 March 15,2015.Published March 2015.Originallyapproved in 2005.Last previous edition approved in 2012 as D7136/D7136M-12.DOI:10.1520/D7136_D7136M-15.2For 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 States1 Sandwich ConstructionsE4 Practices for Force Verification of Testing MachinesE6 Terminology Relating to Methods of Mechanical TestingE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or ProcessE177 Practice for Use of the Terms Precisi