ASTM_D_7137_-_D_7137M_-_12.pdf

Designation:D7137/D7137M12Standard Test Method forCompressive Residual Strength Properties of DamagedPolymer Matrix Composite Plates1This standard is issued under the fixed designation D7137/D7137M;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 covers compression residual strengthproperties of multidirectional polymer matrix composite lami-nated plates,which have been subjected to quasi-static inden-tation per Test Method D6264/D6264M or drop-weight impactper Test Method D7136/D7136M prior to application ofcompressive force.The composite material forms are limited tocontinuous-fiber reinforced polymer matrix composites withmultidirectional fiber orientations,and which are both symmet-ric and balanced with respect to the test direction.The range ofacceptable test laminates and thicknesses is defined in 8.2.NOTE1When used to determine the residual strength of drop-weightimpacted plates,this test method is commonly referred to as theCompression After Impact,or CAI,method.1.2 The method utilizes a flat,rectangular composite plate,previously subjected to a damaging event,which is testedunder compressive loading using a stabilization fixture.NOTE2The damage tolerance properties obtained are particular to thetype,geometry and location of damage inflicted upon the plate.1.3 The properties generated by this test method are highlydependent upon several factors,which include specimengeometry,layup,damage type,damage size,damage location,and boundary conditions.Thus,results are generally notscalable to other configurations,and are particular to thecombination of geometric and physical conditions tested.1.4 This test method can be used to test undamaged polymermatrix composite plates,but historically such tests havedemonstrated a relatively high incidence of undesirable failuremodes(such as end crushing).Test Method D6641/D6641M isrecommended for obtaining compressive properties of undam-aged polymer matrix composites.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 CompositeMaterialsD3878 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 ForceD6641/D6641M Test Method for Compressive Properties ofPolymer Matrix Composite Materials Using a CombinedLoading Compression(CLC)Test FixtureD7136/D7136M Test Method for Measuring the DamageResistance of a Fiber-Reinforced Polymer Matrix Com-posite to a Drop-Weight Impact EventE4 Practices for Force Verification of Testing MachinesE6 Terminology Relating to Methods of Mechanical TestingE122 Practice for Calculating Sample Size to Estimate,With1This 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 April 1,2012.Published May 2012.Originallyapproved in 2005.Last previous edition approved in 2007 as D7137/D7137M-07.DOI:10.1520/D7137_D7137M-12.2For 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 Specified Precision,the Average for a Characteristic of aLot or ProcessE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE456 Terminology Relating to Quality and StatisticsE1309 GuideforIdentificationofFiber-ReinforcedPolymer-Matrix Composite Materials in DatabasesE1434 Guide for Recording Mechanical Test