ASTM_D_2182_-_72_1978_scan.pdf

;-/-5:i-0C,)r=Ro.:J ANSI/ASTM D 2182-72(Reapproved 1978)Standard Test Method for STRENGTH PROPERTIES OF METAL-TO-METAL ADHESIVES BY COMPRESSION LOADING(DISK SHEAR)1 This standard is issued under the fixed designation D 2182;the number immediately following the designation indicates the year of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.I.Scope 1.1 This method covers the determination of the shear strength of adhesives when tested on a standard specimen under specified condi-tions of preparation and loading in compres-sion.This method is intended primarily as an evaluation of adhesives for metals.2.Apparatus 2.1 Testing Machine with a capacity of not less than 4500 kg(10,000 lb)in compression.The testing machine shall be capable of main-taining a uniform rate of loading,such that the load can be applied at a constant rate to a maximum load at a rate of 85 to 100 kgf/cm2(1200 to 1400 psi)per min.The testing ma-chine shall conform to the requirements of ASTM Methods E 4,Verification of Testing Machines.2 2.2 Shearing Tool-The tests shall be per-formed using a shearing tool consisting of a semicircular anvil held vertically by rigid sup-ports.The shearing tool shown in Figs.l and 2 has been found satisfactory.3 One side of this shearing tool has a built-in,thermostat-ted,electric heater.However,other heating methods may be used.In order to obtain the proper clearance between the shearing tool and the specimen,the radius of the anvil(Fig.l)shall be 14.55 0.05 mm(0.573 0.002 in.).The thickness of the anvil(Fig.l(b)shull be 6.86 0.13 mm(0.270 0.005 in.),and the depth of the slot in the spacer(Fig.l(c)shall be 13.72 0.13 mm(0.540 0.005 in.).2696 3.Test Specimens 3.l Each test specimen shall be formed from a strip and disk of the dimensions shown in Fig.3.The disks shall have an area of 6.45 cm2(l in.2)with a radius of 14.32 0.05 mm(0.564 0.002 in.).The thickness of the disk shall be 6.35 0.05 mm(0.250 0.002 in.).A thermocouple well shall be drilled in the disk parallel to the bonding surface as shown in Fig.3.The strip shall be 107.95 0.25 mm(4.25 0.010 in.)long,28.66 0.050 mm(l.128 0.002 in.)wide,and 6.35 0.050 mm(0.250 0.002 in.)thick.The strip and disk shall be ground flat to 0.025 mm(0.001 in.).The strip and disk may be made of any desired metal,or even of dissimilar me-tals.One surface of the disk and one surface of the strip shall be prepared according to the procedure to be used in the manufacture of the parts.3.2 The adhesive shall be prepared and applied according to the recommendations of the manufacturer of the adhesive to both the disk and a portion of the strip.The adhesive-coated strips and disks shall then be assem-bled and bonded according to the procedure to be used in the manufacture of the parts.The 1 This method is under the jurisdiction of ASTM Com-mittee D-14 on Adhesives.Current edition approved July 28,1972.Published Oc-tober 1972.Originally published as D 2l82-63 T.Last pre-vious edition D 2182-69.Annual Book of ASTM Standards,Part 10.3 Blueprints of detailed drawings for the construction of the shearing tool shown in Fig.I are available at a nominal cost from the American Society for Testing and Materials,1916 Race St.,Philadelphia,Pa.19103.Request Adjunct No.12-421820-00.669 NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.disk shall be positioned on the strip as shown in the assembly drawing in Fig.3.The adhe-sive flash shall be removed prior to testing.3.3 At least five specimens shall be tested for each adhesive.4.Conditioning 4.1 Test specimens shall be conditioned prior to testing in accordance with ASTM Methods D 618,Conditioning Plastics and Electrical Insulating Materials for Testing.4 5.Procedure 5.1 Place the test specimen in the shearing tool so that the disk of the test specimen rests on the anvil of the shearing tool and the strip of the test specimen extends from the top of the shearing tool.Place the assembly in the testing machine and load in compression at a rate of 85 to 100 kgf/cm2(1200 to 1400 psi)per min to failure.5.2 For elevated temperature testing heat the specimen to the desired temperature and hold at temperature for 10 min prior to load-ing.If the shearing tool shown in Figs.I and 2 is to be used,heat it to the desired tempera-ture before the specimen is inserted.Insert the specimen in the shearing tool with the thermocouple placed in the hole drilled in the disk of the test specimen and hold at tempera-ture for 10 min prior to loading.Coat the back side of the strip with a high-vacuum sili-cone grease to improve heat transfer to the strip.To adjust the thermostat,place a test specimen with thermocouple inserted in the shearing tool and adjust the thermostat to give the desired temperature.Do not test the spec-imen used for this purpose.2697 670 f-1 D 2182 6.Calc