ASTM_D_3528_-_96_2016.pdf

Designation:D352896(Reapproved 2016)Standard Test Method forStrength Properties of Double Lap Shear Adhesive Joints byTension Loading1This standard is issued under the fixed designation D3528;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 indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONThe accuracy of the results of strength tests of adhesive bonds will depend on the conditions underwhich the bonding process is carried out.Unless otherwise agreed upon between the manufacturer andthe purchaser,the bonding conditions should be prescribed by the manufacturer of the adhesive.Inorder to ensure that complete information is available to the individual conducting the tests,themanufacturer of the adhesive should furnish numerical values and other specific information for eachof the following variables:(1)Surface preparation(2)Mixing directions(3)Adhesive application(4)Assembly conditions(5)Curing conditions(6)Testing conditionsArange may be prescribed for any variable by the manufacturer of the adhesive if it can be assumedby the test operator that any arbitrarily chosen value within such a range or any combination of suchvalues for several variables will be acceptable to both the manufacturer and the purchaser of theadhesive.1.Scope1.1 This test method covers the determination of the tensileshear strengths of adhesives for bonding metals when tested inan essentially peel-free standard specimen that develops adhe-sive stress distribution representative of that developed in atypical low-peel production-type structural joint.The repro-ducibility of the strengths achieved are directly related toconformance with specified conditions of preparation andtesting.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.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:2A167 Specification for Stainless and Heat-ResistingChromium-Nickel Steel Plate,Sheet,and Strip(With-drawn 2014)3B36/B36M Specification for Brass Plate,Sheet,Strip,AndRolled BarB152/B152M Specification for Copper Sheet,Strip,Plate,and Rolled BarB209 Specification for Aluminum and Aluminum-AlloySheet and PlateB265 Specification for Titanium and Titanium Alloy Strip,Sheet,and PlateD618 Practice for Conditioning Plastics for TestingD907 Terminology of AdhesivesE4 Practices for Force Verification of Testing MachinesE122 Practice for Calculating Sample Size to Estimate,With1This test method is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.80 on MetalBonding AdhesivesCurrent edition approved May 1,2016.Published May 2016.Originallyapproved in 1976.Last previous edition approved in 2008 as D3528 96(2008).DOI:10.1520/D3528-96R16.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 Specified Precision,the Average for a Characteristic of aLot or ProcessE171 Practice for Conditioning and Testing Flexible BarrierPackaging3.Terminology3.1 DefinitionsMany terms in this test method are definedin Terminology D907.4.Significance and Use4.1 This test method is designed to produce shear propertydata for the process control and specification of adhesives.Thistest method may also be useful for research and developmentof adhesives.4.2 Lap shear properties vary with specimen configurationpreparation,speed,and environment of testing.Consequently,where precise comparative results are desired,these factorsmust be carefully controlled and reported.5.Apparatus5.1 Testing Machine,conforming to the requirements ofPractices E4.The testing machine should be so selected that thebreaking load of the specimens falls between 15 and 85%ofthe full-scale capacity.The machine should be capable ofmaintaining a rate of loading of 8.27 to 9.65 MPa(1200 to1400 psi)/min,or if the rate is dependent on crosshead motion,the machine should be set to approach the rate of loading.Itshould be provided with a suitable pair of self-aligning grips tohold the specimen.The grips and attachments should be soconstructed that they will move into alignment with the testspecimen as soon as the load is applied,so that the long axis ofthe test specimen w