1、Designation:D562810Standard Test Method forImpact Resistance of Flat,Rigid Plastic Specimens byMeans of a Falling Dart(Tup or Falling Mass)1This standard is issued under the fixed designation D5628;the number immediately following the designation indicates the year oforiginal adoption or,in the case
2、 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.Scope*1.1 This test method covers the determination of the thresh-old value of impact-failure energy requir
3、ed to crack or breakflat,rigid plastic specimens under various specified conditionsof impact of a free-falling dart(tup),based on testing manyspecimens.1.2 The values stated in SI units are to be regarded as thestandard.The values in parentheses are for information only.1.3 This standard does not pu
4、rport 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.Specific hazardstatements are given in Section
5、8.NOTE1This test method and ISO 6603-1 are technically equivalentonly when the test conditions and specimen geometry required forGeometry FE and the Bruceton Staircase method of calculation are used.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD883 Ter
6、minology Relating to PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD1709 Test Methods for Impact Resistance of Plastic Filmby the Free-Falling Dart MethodD2444 Test Method for Determination of the Impact Resis-tance of Thermoplastic Pipe and Fittings by Means of aTup(Falling We
7、ight)D3763 Test Method for High Speed Puncture Properties ofPlastics Using Load and Displacement SensorsD4000 Classification System for Specifying Plastic Materi-alsD5947 Test Methods for Physical Dimensions of SolidPlastics SpecimensD6779 Classification System for and Basis of Specificationfor Poly
8、amide Molding and Extrusion Materials(PA)E691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 ISO Standards:3ISO 291 Standard Atmospheres for Conditioning and Test-ingISO 6603-1 PlasticsDetermination of Multiaxial ImpactBehavior of Rigid PlasticsPart 1:
9、Falling Dart Method3.Terminology3.1 Definitions:3.1.1 For definitions of plastic terms used in this testmethod,see Terminologies D883 and D1600.3.2 Definitions of Terms Specific to This Standard:3.2.1 failure(of test specimen)the presence of any crackor split,created by the impact of the falling tup
10、,that can beseen by the naked eye under normal laboratory lightingconditions.3.2.2 mean-failure energy(mean-impact resistance)theenergy required to produce 50%failures,equal to the productof the constant drop height and the mean-failure mass,or,tothe product of the constant mass and the mean-failure
11、 height.3.2.3 mean-failure height(impact-failure height)theheight at which a standard mass,when dropped on testspecimens,will cause 50%failures.NOTE2Cracks usually start at the surface opposite the one that isstruck.Occasionally incipient cracking in glass-reinforced products,forexample,is difficult
12、 to differentiate from the reinforcing fibers.In suchcases,a penetrating dye can confirm the onset of crack formation.3.2.4 mean-failure mass(impact-failure mass)the mass ofthe dart(tup)that,when dropped on the test specimens from astandard height,will cause 50%failures.3.2.5 tupa dart with a hemisp
13、herical nose.See 7.2 andFig.1.1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.10 on Mechanical Properties.Current edition approved July 1,2010.Published July 2010.Originally approvedin 1994.Last previous edition approv
14、ed in 2007 as D5628-07.DOI:10.1520/D5628-10.2For 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 Americ
15、an National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 Dimensions of Conical Dart
16、(Not to scale.)Fig.1(b)NOTE1Unless specified,the tolerance on all dimensions shall be 62%.PositionDimension,mmDimension,in.A27.21.07B150.59C12.20.48D6.40.25E25.41F12.70.5R6.35 0.050.250 0.002(nose radius)r(radius)0.80.03S(diameter)A6.40.2525 125 1ALarger diameter shafts shall be used.FIG.1 Tup Geometries for Geometries FA(1a),FB(1b),FC(1c),FD(1d),and FE(1e)D5628 102 4.Summary of Test Method4.1 A free-falling dart(tup)is allowed to strike a supportedspecimen directly.Either a dart having a fixed
