ASTM D3528-1996(2008) Standard Test Method for Strength Properties of Double Lap Shear Adhesive Joints by Tension Loading《用拉力负荷法测定双搭接剪切粘结接头的强度特性的标准试验方法》.pdf
《ASTM D3528-1996(2008) Standard Test Method for Strength Properties of Double Lap Shear Adhesive Joints by Tension Loading《用拉力负荷法测定双搭接剪切粘结接头的强度特性的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D3528-1996(2008) Standard Test Method for Strength Properties of Double Lap Shear Adhesive Joints by Tension Loading《用拉力负荷法测定双搭接剪切粘结接头的强度特性的标准试验方法》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 3528 96 (Reapproved 2008)Standard Test Method forStrength Properties of Double Lap Shear Adhesive Joints byTension Loading1This standard is issued under the fixed designation D 3528; the number immediately following the designation indicates the year oforiginal adoption or, in the cas
2、e of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 conditi
3、ons 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,
4、 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 conditionsA range may be prescribed for any v
5、ariable 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
6、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
7、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 co
8、ncerns, 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:2A 167 Specification for Stainless and
9、 Heat-ResistingChromium-Nickel Steel Plate, Sheet, and StripB 36/B 36M Specification for Brass Plate, Sheet, Strip, AndRolled BarB 152/B 152M Specification for Copper Sheet, Strip, Plate,and Rolled BarB 209 Specification for Aluminum and Aluminum-AlloySheet and PlateB 265 Specification for Titanium
10、and Titanium Alloy Strip,Sheet, and PlateD 618 Practice for Conditioning Plastics for TestingD 907 Terminology of AdhesivesE4 Practices for Force Verification of Testing MachinesE 122 Practice for Calculating Sample Size to Estimate,With Specified Precision, the Average for a Characteristicof a Lot
11、or Process1This 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 April 1, 2008. Published April 2008. Originallyapproved in 1976. Last previous edition approved in 2002 as
12、 D 3528 96 (2002).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.1Copyright ASTM International, 100 Barr Har
13、bor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.E 171 Specification for Atmospheres for Conditioning andTesting Flexible Barrier Materials3. Terminology3.1 DefinitionsMany terms in this test method are definedin Terminology D 907.4. Significance and Use4.1 This test method is
14、 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 prec
15、ise 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 thatthe breaking load of the specimens falls between 15 and 85 %of the full-scale capa
16、city. 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 specim
17、en. 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 will coincide with the direction of the appliedpull through the center line of the grip assembly.6. Test Specimen6.
18、1 The test specimens should conform to one of thealternative types as dimensioned and shown in Fig. 1 or Fig. 2.Cut the specimens from the appropriate test panels that havebeen prepared as prescribed in Section 7. For aluminum-alloyspecimens the recommended thickness of the sheet is 3.24 60.125 mm (
19、0.125 6 0.005 in.). The recommended test overlaplength (L) for most metals, with adherends of the prescribedmetal thickness and arranged as shown in Figs. 1 and 2, is 12.76 0.25 mm (0.5 6 0.01 in.).NOTE 1Since it is undesirable to exceed the yield point of the metalin tension during test, the permis
20、sible length of overlap in the specimenwill vary with the thickness and type of metal and on the general level ofstrength of the adhesive being investigated. The maximum permissiblelength may be computed from the following relationship:L 5Fty t1tand L 5Fty t22where:L = length of overlap, in., (Figs.
21、 1 and 2),t1= thickness of doubler, in., (Figs. 1 and 2),t2= thickness of adherend in., (Figs. 1 and 2),Fty = yield point of adherend (or stress at proportional limit), psi, andt = 150 % of the estimated average shear strength of the adhesivebond, psi.NOTE 2Variations in adherend thickness, and of t
22、he length of theoverlap, normally influence the test values and make direct comparison oftest data questionable. Therefore, it is preferable for the comparative orspecification tests, to standardize on the typical specimen configurationshown with appropriate adherend gages as computed in accordance
23、withNote 1. When specimens incorporating special lap lengths are developedfor specific studies, the adherend gage and geometry, once established,should not be altered.6.2 The following grades of metals are recommended forthe test specimens:T1=1.6mmT2=3.2mmA = Test GluelinesB = Spacer = T2C = Area in
24、 Test GripsD Shear AreaFIG. 1 Form and Dimensions of Type A SpecimensT1=1.6mmT2=3.2mmA = Test GluelinesB = Area in Test GripsC = Shear areasFIG. 2 Form and Dimensions of Type B SpecimenD 3528 96 (2008)2Brass Specification B 36/B 36M, CDA 268Copper Specification B 152/b 152M, CDA 110Aluminum Specific
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