1、Designation: D3166 99 (Reapproved 2012)Standard Test Method forFatigue Properties of Adhesives in Shear by TensionLoading (Metal/Metal)1This standard is issued under the fixed designation D3166; the number immediately following the designation indicates the year oforiginal adoption or, in the case o
2、f 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test met
3、hod covers the measurement of fatiguestrength in shear by tension loading of adhesives on a standardspecimen and under specified conditions of preparation,loading, and testing.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly
4、.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
5、Documents2.1 ASTM Standards:2D907 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 terms in this test method are definedin Terminology D907.4. Significance
6、 and Use4.1 While this test method is intended for use in metal-to-metal applications it may be used for measuring the fatigueproperties of adhesives using plastic adherends, providedconsideration is given to the thickness of the plastic adherends.Doublers may be required for plastic adherends to pr
7、eventbearing failure in the adherends.4.2 A variation in the thickness of the adherends caninfluence the test results. For this reason, the thickness of thesheets used to make the test specimens should be specified inthe material specification. When no thickness is specified,metal adherends 1.63 mm
8、(0.064 in.) thick are recommended.5. Apparatus5.1 Testing Machine, capable of applying a sinusoidal cyclicaxial load. The cyclic rate and type of equipment (constant loador constant displacement) can influence test results. For thisreason, the cyclic rate and equipment should be specified in themate
9、rial specification. When no cyclic rate is specified 1800cycles/min is recommended. Employ suitable grips and jaws sothat the specimen can be gripped tightly and held in alignmentas the load, accurate within 62 %, is applied.6. Test Specimens6.1 Use test specimens conforming to the shape and dimen-s
10、ions shown in Fig. 1, having grip ends suitable for use in theparticular testing machine. These specimens are similar to thetension lap-shear specimens described in Test Method D1002.6.2 Test at least 25 specimens shall be tested, representing atleast 4 different panels.6.3 Prepare, cut, finish, and
11、 condition the specimens in thesame manner as for Test Method D1002. Employ an overlap of9.5 mm (0.38 in.) for 1.63-mm (0.064-in.) aluminum alloys.Ensure that the dimensions of other materials are such thatfailures occur in the bond. (An overlap of 12.7 mm (0.50 in.)for 6.4-mm (0.25-in.) thick nonme
12、tals should be used ifpossible.)7. Procedure7.1 Unless otherwise specified, test the specimens in anatmosphere maintained at 50 6 4 % relative humidity and 236 1.1C (73.5 6 2F). Precondition the specimens for at least16 h.7.2 Place the specimen in the jaws of the testing machineand grip tightly so t
13、hat the specimen and the jaws are perfectly1This 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 Oct. 1, 2012. Published October 2012. Originallyapproved in 1973. Last pr
14、evious edition approved in 2005 as D3166 99 (2005).DOI: 10.1520/D3166-99R12.2For 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 onth
15、e ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1aligned in such a position that an imaginary vertical line wouldpass through the center of the bonded area and through thepoints of suspension (Fig. 1). Ensure that the ed
16、ge of the lap is25.4 mm (1 in.) from the edge of the grip. Apply the cyclicload, ranging from a maximum to approximately 10 % of themaximum, and check periodically. The maximum load selectedwill depend upon the strength of the adhesive in shear tensionloading and the desired life.7.3 Test five speci
17、mens each at five or more maximum loadsselected such that failures occur with regular spacing over arange varying from at least 10 000 000 cycles to not less than2000 cycles. (As a guide, the initial maximum load may be50 % of the strength of the adhesive in shear by tensionloading.)7.4 Record the n
18、umber of cycles to failure and the corre-sponding loads, calculated in megapascals (pounds-force persquare inch). Measure the specimen bond dimensions accu-rately enough to calculate the area to the nearest 0.6 mm (0.01in.2). The location of failure (adhesive or joint material), andnature of failure
19、 if in the adhesive, (amounts of cohesion,adhesion, or contact failures) should be recorded for eachspecimen.8. Report8.1 Report the following:8.1.1 Complete identification of the materials, procedures,and equipment (constant load or constant displacement) used.8.1.2 Dimensions of the bond area incl
20、uding width andlength 62.5 mm (0.01 in.) and bonding thickness 60.0127 mm(0.0005 in.). The method of obtaining the thickness of theadhesive layer shall be described including procedure, locationof measurements, and range of measurements.8.1.3 Temperature and relative humidity in the test room.8.1.4
21、Cycling rate in cycles per minute.8.1.5 Number of cycles to failure and corresponding loadscalculated in megapascals (pounds-force per square inch)recorded on stress-log cycle coordinates. The point at whichthe curve intercepts the 10 million cycle coordinate shall bedesignated as the “fatigue stren
22、gth at 10 million cycles.”8.1.6 Conditioning procedure used for specimens prior totesting.8.1.7 Number of specimens tested.8.1.8 Location and nature of failure (relative percentage ofadhesive or adherend, adhesion, or contact) for each specimenif it occurs before the fatigue test is completed.9. Pre
23、cision and Bias9.1 No information is presented on either precision or biasfor Test Method D3166 since test results are non-quantitative.9.2 The precision and bias of this test method are a functionof the adhesive system, surface preparation, substrates, testtemperature, cyclic stress level, and othe
24、r factors related to thetest apparatus, laboratory, and operator variabilities. Precisionshall be reported in terms of the standard deviation of the dataand the standard error of the mean.10. Keywords10.1 adhesive; fatigue; shear; single-lap joint; tension load-ingASTM International takes no positio
25、n respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.
26、This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM I
27、nternational Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address sho
28、wn below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).NOTE 1Minimum specimen length in the grip 25.4 mm (1 in.).FIG. 1 Test SpecimenD3166 99 (2012)2
