1、Designation:D729006(Reapproved 2011)Standard Practice forEvaluating Material Property Characteristic Values forPolymeric Composites for Civil Engineering StructuralApplications1This standard is issued under the fixed designation D7290;the number immediately following the designation indicates the ye
2、ar oforiginal adoption or,in the case 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.Scope1.1 This practice covers the procedures for computingcharacterist
3、ic values of material properties of polymeric com-posite materials intended for use in civil engineering structuralapplications.The characteristic value is a statistically-basedmaterial property representing the 80%lower confidencebound on the 5th-percentile value of a specified population.Character
4、istic values determined using this standard practicecan be used to calculate structural member resistance values indesign codes for composite civil engineering structures and forestablishing limits upon which qualification and acceptancecriteria can be based.1.2 This standard does not purport to add
5、ress 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:2D883 Terminology
6、Relating to PlasticsD3878 Terminology for Composite MaterialsD5055 Specification for Establishing and Monitoring Struc-tural Capacities of Prefabricated Wood I-JoistsD5457 Specification for Computing Reference Resistance ofWood-Based Materials and Structural Connections forLoad and Resistance Factor
7、 DesignD5574 Test Methods for EstablishingAllowable MechanicalProperties of Wood-Bonding Adhesives for Design ofStructural JointsE6 Terminology Relating to Methods of Mechanical TestingE178 Practice for Dealing With Outlying ObservationsE456 Terminology Relating to Quality and Statistics2.2 Other Do
8、cument:MIL-Handbook-17 Polymer Matrix Composites,Volume 1,Revision F33.Terminology3.1 DefinitionsTerminology D3878 defines terms relatingto high-modulus fibers and their composites.TerminologyD883 defines terms relating to plastics.Terminology E6 definesterms relating to mechanical testing.Terminolo
9、gy E456 definesterms relating to statistics.In the event of a conflict betweenterms,Terminology D3878 shall have precedence over theother documents.3.2 Definitions of Terms Specific to This Standard:3.2.1 characteristic valuea statistically-based materialproperty representing the 80%lower confidence
10、 bound on the5th-percentile value of a specified population.The character-istic value accounts for statistical uncertainty due to a finitesample size.3.2.1.1 DiscussionThe 80%confidence bound and 5th-percentile levels were selected so that composite materialcharacteristic values will produce resista
11、nce factors for Loadand Resistance Factor Design similar to those for other civilengineering materials(see Refs 1 and 2).43.2.1.2 DiscussionThe term“characteristic value”isanalogous to the term“basis value”used in the aerospaceindustry where A-and B-basis values are defined as the 95%lower confidenc
12、e bound on the lower 1%and 10%values ofa population,respectively.3.2.2 data confidence factor,Va factor that is used toadjust the sample nominal value for uncertainty associated withfinite sample size.3.2.3 nominal valuethe 5th percentile value of the datarepresented by a probability density functio
13、n.1This practice is under the jurisdiction of ASTM Committee D30 on CompositeMaterials and is the direct responsibility of Subcommittee D30.10 on Compositesfor Civil Structures.Current edition approved Aug.1,2011.Published December 2011.Originallyapproved in 2006.Last previous edition approved in 20
14、06 as D729006.DOI:10.1520/D7290-06R11.2For 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 U.S.Governme
15、nt Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.4The boldface numbers in parentheses refer to the list of references at the end ofthis standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohoc
16、ken,PA 19428-2959.United States1 3.2.4 outlieran outlying observation,or“outlier,”is onethat deviates significantly from other observations in thesample in which it occurs.4.Significance and Use4.1 This practice covers the procedures for computingmaterial property characteristic values for polymeric compositematerials intended for use in civil engineering structuralapplications.A characteristic value represents a statisticallower bound on the material property structural memberresistance factors
