ASTM_D_7616_-_D_7616M_-_11.pdf

Designation:D7616/D7616M11Standard Test Method forDetermining Apparent Overlap Splice Shear StrengthProperties of Wet Lay-Up Fiber-Reinforced Polymer MatrixComposites Used for Strengthening Civil Structures1This standard is issued under the fixed designation D7616/D7616M;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 describes the requirements for samplepreparation and tensile testing of single-lap shear splicesformed with fiber-reinforced polymer(FRP)composite mate-rials commonly used for strengthening of structures made ofmaterials such as metals,timber,masonry,and reinforcedconcrete.The objective of this method is to determine theapparent shear strength of an overlap splice joint through theapplication of a far-field tensile force.The method applies towet lay-up FRP material systems fabricated on site or in alaboratory setting.The FRP composite may be of eitherunidirectional(0)or cross-ply(0/90 type)reinforcement.Forcross-ply laminates,the construction may be achieved usingmultiple-layers of unidirectional fibers at either 0 or 90,or oneor more layers of stitched or woven 0/90 fabrics.The compos-ite material forms are limited to continuous fiber or discon-tinuous fiber-reinforced composites in which the laminate isbalanced and symmetric with respect to the test direction.Themethod is often used to determine the length of the overlapsplice needed to ensure that a tension failure occurs in thematerial away from the splice rather than the splice connectionitself.1.2 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.1.2.1 Within the text,the inch-pound units are shown inbrackets.1.3 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:2D883 Terminology Relating to PlasticsD3039/D3039M Test Method for Tensile Properties of Poly-mer Matrix Composite MaterialsD3878 Terminology for Composite MaterialsD4896 Guide for Use of Adhesive-Bonded Single Lap-JointSpecimen Test ResultsD5229/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-tionD7565/D7565M Test Method for Determining Tensile Prop-erties of Fiber Reinforced Polymer Matrix CompositesUsed for Strengthening of Civil StructuresE6 Terminology Relating to Methods of Mechanical TestingE122 Practice for Calculating Sample Size to Estimate,WithSpecified 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 Statistics2.2 Other Standards:3DOT/FAA/AR-01/33 Investigation of Thick BondlineAdhe-sive Joints,June 2001DOT/FAA/AR-02/97 Shear Stress-Strain Data for StructuralAdhesives,November 20023.Terminology3.1 DefinitionsTerminology D3878 defines terms relatingto high-modulus fibers and their composites.TerminologyD883 defines terms relating to plastics.Terminology E6 defines1This test method is under the jurisdiction of ASTM Committee D30 onComposite Materials and is the direct responsibility of Subcommittee D30.10 onComposites for Civil Structures.Current edition approved March 1,2011.Published May 2011.DOI:10.1520/D7616_D7616M-11.2For 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 at the Federal Aviation Administration William J.Hughes TechnicalCenter Full-Text Technical Reports page:http:/207.67.203.68/F10011.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 terms relating to mechanical testing.Terminology E456 andPractice E177 define terms relating to statistics.In the event ofa conflict between terms,Terminology D3878 shall haveprecedence over the other standards.3.2 Definitions of Terms Specific to This Standard:3.2.1 nominal value,na value,existing in name only,assigned to a measurable property for the purpose of conve-nient designation.Tolerances may be applied to a nominalvalue to define an acceptable range for the property.3.2.2 screed,vto mo