ASTM_D_3658_-_01_2016.pdf

Designation:D365801(Reapproved 2016)Standard Test Method forDetermining the Torque Strength of Ultraviolet(UV)Light-Cured Glass/Metal Adhesive Joints1This standard is issued under the fixed designation D3658;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.1.Scope1.1 This test method covers the simplistic comparison ofstrengths of glass/metal joints when the adhesive is cured byultraviolet(UV)radiation and standard specimens are used andtested under specified conditions of preparation,radiation,andload.1.2 This test method involves torque loading UV-bondedhexagonal metal blocks to glass plates.1.3 This test method may be used to obtain comparativetorque strength-to-failure data for other bonded joint systems,radiation cured or not.1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 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:2A109/A109M Specification for Steel,Strip,Carbon(0.25Maximum Percent),Cold-RolledA167 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 PlateD907 Terminology of AdhesivesD1002 Test Method for Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens by Ten-sion Loading(Metal-to-Metal)3.Terminology3.1 DefinitionsMany of the terms in this test method aredefined in Terminology D907.4.Significance and Use4.1 This test method provides reasonably accurate informa-tion with regard to the ability of UV curing adhesives towithstand torsional shearing forces.It may be used to deter-mine the effect of environment on torsional shear strength.5.Apparatus5.1 Test system consisting of apparatus capable of transfer-ring a uniform and continuous torque to the bonded hexagonalblock(schematically shown in Fig.1),and a safety shield orother safety device to prevent injury from possible shatteringglass.5.2 An accurate and reliable means of recording load tofailure,that is,x-y or strip chart recorder,should also be part ofthe test system.6.Test Specimens6.1 Recommended specimens are as shown in Fig.2.6.2 Selection of the test metal for hexagonal blocks is at thediscretion of the user;however,the following grades arerecommended(see Test Method D1002):MetalSpecificationBrassB36/B36M,Alloy 8CopperB152/B152M,Type AAluminumB209,Alloy 2024,T3 TemperSteelA109/A109M,Grade 2Corrosion-resisting steelA167,Type 302TitaniumB2651This test method is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.80 on MetalBonding Adhesives.Current edition approved May 1,2016.Published May 2016.Originallyapproved in 1978.Last previous edition approved in 2008 as D3658 01(2008).DOI:10.1520/D3658-01R16.2For 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 6.3 Hexagonal blocks may be reused after testing by bond-ing the opposite end of the block or by cleaning the originalbonded end by sanding or grinding and taking care to ensurethat ends are smooth and parallel.6.4 Selection of the glass plate is at the discretion of theuser.Standard12-in.(13-mm)thick pressed plate glass isrecommended.7.Preparation of Test Specimens7.1 The assembly and cure of the specimen is recommendedas shown in Fig.3.7.2 Cut glass plates 3 by 3 in.(76 by 76 mm)square to fitthe holding fixture without lateral movement.7.3 A recommended cleaning procedure is to soak the glassplates in a dilute detergent solution for 2 to 3 min,followed bylight scrubbing with an absorbent cleaning tissue.4Thenthoroughly rinse the glass plates with distilled or deionizedwater and air dry.7.4 Metal hexagonal blocks,12in.(13 mm)high,may beprepared by light sanding with 400 grade wet or dry emerypaper,followed by solvent wiping,such as 1,1,1-trichloro-ethane.