ASTM D7290-06(2017) Standard Practice for Evaluating Material Property Characteristic Values for Polymeric Composites for Civil Engineering Structural Applications.pdf
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1、Designation: D7290 06 (Reapproved 2017)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 th
2、e year 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 computingc
3、haracteristic 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 popula
4、tion.Characteristic 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
5、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.1.3 This international standard was develo
6、ped in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Docum
7、ents2.1 ASTM Standards:2D883 Terminology 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
8、Connections forLoad and Resistance Factor DesignD5574 Test Methods for Establishing Allowable MechanicalProperties of Wood-Bonding Adhesives for Design ofStructural JointsE6 Terminology Relating to Methods of Mechanical TestingE178 Practice for Dealing With Outlying ObservationsE456 Terminology Rela
9、ting to Quality and Statistics2.2 Other Document: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 defines
10、terms relating to mechanical testing. Terminology 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 mate
11、rialproperty representing the 80 % lower confidence 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 compos
12、ite materialcharacteristic values will produce resistance 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
13、 A- and B-basis values are defined as the 95 %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, 2017. Published September 2017. Originallyappr
14、oved in 2006. Last previous edition approved in 2011 as D729006(2011). DOI:10.1520/D7290-06R17.2For 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 Documen
15、t Summary page onthe ASTM website.3Available from U.S. Government 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.Copyrig
16、ht 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 Internationa
17、l Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1lower confidence bound on the lower 1 % and 10 % values ofa population, respectively.3.2.2 data confidence factor, a factor that is used toadjust the sample nominal value for u
18、ncertainty associated withfinite sample size.3.2.3 nominal valuethe 5th percentile value of the datarepresented by a probability density function.3.2.4 outlieran outlying observation, or “outlier,” is onethat deviates significantly from other observations in thesample in which it occurs.4. Significa
19、nce 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 member
20、resistance factors for civil engineering design codes for com-posite structures.4.2 This practice may be used to obtain characteristic valuesfor stiffness and strength properties of composite materialsobtained from measurements using applicable test methods.5. Sampling5.1 Samples selected for analys
21、is shall be representative ofthe material property population for which the characteristicvalues are to be calculated.5.2 The minimum number of samples shall be specified indesign codes that reference this standard.NOTE 1Section 5.3.1 of the building code requirements for structuralconcrete (ACI 318
22、-05) requires at least 30 samples to determine thestandard deviation of concrete compressive strength for a new batch plantbut allows a reduction to a minimum of 15 samples, provided that amodification factor is used to increase the standard deviation if less than30 samples are used (Ref 3). For woo
23、d, Specification D5457 requires aminimum of 30 samples for computing the reference resistance of woodbased materials and structural connections for Load and Resistance FactorDesign, and states that extreme care must be taken during sampling toensure a representative sample for sample sizes less than
24、 60. The bendingcapacity of wood I-joists can be determined either by analysis orempirically by testing (Specification D5055). If the capacity is determinedby analysis, a minimum of ten confirming tests is required at each of theextremes of flange size, allowable stress, and joist depth. Test Method
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