1、Designation: D 3166 99 (Reapproved 2005)Standard Test Method forFatigue Properties of Adhesives in Shear by TensionLoading (Metal/Metal)1This standard is issued under the fixed designation D 3166; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test
3、method covers the measurement of fatiguestrength in shear by tension loading of adhesives on a standardspecimen and under specified conditions of preparation, load-ing, and testing.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informatio
4、nonly.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. Refere
5、nced Documents2.1 ASTM Standards:2D 907 Terminology of AdhesivesD 1002 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 D 907.4. Sign
6、ificance 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 adheren
7、ds to preventbearing 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
8、1.63 mm (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
9、 thematerial 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
10、 dimen-sions 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 D 1002.6.2 Test at least 25 specimens shall be tested, representing atleast 4 different panels.6.3 Prepare, cut, fi
11、nish, and condition the specimens in thesame manner as for Test Method D 1002. 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.) t
12、hick nonmetals 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 ti
13、ghtly so that the specimen and the jaws are perfectlyaligned 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 edge of the lap is1This test method is under the jurisdiction of ASTM Committe
14、e D14 onAdhesives and is the direct responsibility of Subcommittee D14.80 on MetalBonding Adhesives.Current edition approved April 1, 2005. Published April 2005. Originallyapproved in 1973. Last previous edition approved in 1999 as D 3166 99.2For referenced ASTM standards, visit the ASTM website, ww
15、w.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 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.25.4
16、 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 specimens each at five or
17、 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 number of cycles to f
18、ailure 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 if in the adhesive,
19、 (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 including width andlengt
20、h 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 Cycling rate in cycl
21、es 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 strength at 10 million cy
22、cles.”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. Precision and Bias9.1 N
23、o information is presented on either precision or biasfor Test Method D 3166 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 other factors related t
24、o 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; tensionloadingASTM International takes no position respecting the vali
25、dity 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.This standard is subj
26、ect 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 International Headquar
27、ters. 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 shown below.This standar
28、d 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).NOTE 1Minimum specimen length in the grip 25.4 mm (1 in.).FIG. 1 Test SpecimenD 3166 99 (2005)2
