1、Designation:D95319Standard Test Method forPin-Bearing Strength of Plastics1This standard is issued under the fixed designation D953;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 ind
2、icates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers the determination of the pin-bearing strength of rigid
3、 plastics in either sheet form,moldedform,or in reinforced thermoset form.Procedures A and B areapplicable for thermoplastic materials in tension loading andcompression loading respectively.Procedure C is applicablefor thermoset reinforced plastics.See the significance and usesection(Section 5)for c
4、autions in using this test standard.1.2 Test data obtained by this test method is relevant andappropriate for use in quality control and engineering design.1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4 This standard do
5、es 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.NOTE1This standard and I
6、SO 12815 address the same subject matter,but differ in technical content.1.5 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 Reco
7、m-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsD5947 Test Methods for Physical Dimensions of SolidPlastics SpecimensD7290 Pr
8、actice for Evaluating Material Property Character-istic Values for Polymeric Composites for Civil Engineer-ing Structural ApplicationsE4 Practices for Force Verification of Testing MachinesE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE6 Terminology Relating to Methods of
9、Mechanical TestingE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 ISO Standards:ISO 12815 Fibre-reinforcedplasticcompositesDetermination of plain-pin bearing strength33.Terminology3.1 DefinitionsFor definitions of technical terms used inthis test m
10、ethod and associated with plastics issues refer toterminology contained in ASTM D883.3.2 Definitions of Terms Specific to This Standard:43.2.1 pin-bearing areathe diameter of the hole multipliedby the thickness of the specimen.3.2.2 pin-bearing strengththe pin-bearing stress at whichthe pin-bearing
11、hole is deformed 4%of its diameter forthermoplastics.For thermosets,the pin-bearing strength is themaximum pin-bearing stress at which the sample fails.3.2.3 pin-bearing stressthe applied load in newtons(orpounds-force)divided by the pin-bearing area in mm2(or in2).3.2.4 edge distance ratiothe dista
12、nce from the center ofthe pin-bearing hole to the edge of the specimen in thedirection of loading,divided by the diameter of the hole.3.2.5 maximum pin-bearing stressthe maximum load innewtons(or pounds-force)sustained by the specimen,dividedby the bearing area.4.Summary of Test Method4.1 This test
13、standard is intended to test the pin-bearingstrength of thermoplastic material using procedures A,B and1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.18 on Reinforced Thermoset-ting Plastics.Current edition approved N
14、ov.1,2019.Published December 2019.Originallyapproved in 1948.Last previous edition approved in 2018 as D953-18.DOI:10.1520/D0953-19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume informatio
15、n,refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Attention is also directed to Terminology E6.*A Summary of Changes section appears at the end of this standardCo
16、pyright 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 reinforced thermoset plastics using procedure C.In proceduresA and B,the sampl
