Standard Test Method for Fatigue Properties of Adhesives in Shear by Tension Loading (Metal/Metal)

SIGNIFICANCE AND USE
4.1 While this test method is intended for use in metal-to-metal applications it may be used for measuring the fatigue properties of adhesives using plastic adherends, provided consideration is given to the thickness of the plastic adherends. Doublers may be required for plastic adherends to prevent bearing failure in the adherends.  
4.2 A variation in the thickness of the adherends can influence the test results. For this reason, the thickness of the sheets used to make the test specimens should be specified in the material specification. When no thickness is specified, metal adherends 1.63 mm (0.064 in.) thick are recommended.
SCOPE
1.1 This test method covers the measurement of fatigue strength in shear by tension loading of adhesives on a standard specimen and under specified conditions of preparation, loading, and testing.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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Publication Date
30-Sep-2012
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ASTM D3166-99(2012) - Standard Test Method for Fatigue Properties of Adhesives in Shear by Tension Loading (Metal/Metal)
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D3166 − 99 (Reapproved 2012)
Standard Test Method for
Fatigue Properties of Adhesives in Shear by Tension
Loading (Metal/Metal)
This standard is issued under the fixed designation D3166; 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. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope Doublers may be required for plastic adherends to prevent
bearing failure in the adherends.
1.1 This test method covers the measurement of fatigue
strength in shear by tension loading of adhesives on a standard 4.2 A variation in the thickness of the adherends can
specimen and under specified conditions of preparation, influence the test results. For this reason, the thickness of the
loading, and testing. sheets used to make the test specimens should be specified in
the material specification. When no thickness is specified,
1.2 The values stated in SI units are to be regarded as the
metal adherends 1.63 mm (0.064 in.) thick are recommended.
standard. The values given in parentheses are for information
only.
5. Apparatus
1.3 This standard does not purport to address all of the
5.1 Testing Machine,capableofapplyingasinusoidalcyclic
safety concerns, if any, associated with its use. It is the
axialload.Thecyclicrateandtypeofequipment(constantload
responsibility of the user of this standard to establish appro-
or constant displacement) can influence test results. For this
priate safety and health practices and determine the applica-
reason, the cyclic rate and equipment should be specified in the
bility of regulatory limitations prior to use.
material specification. When no cyclic rate is specified 1800
cycles/minisrecommended.Employsuitablegripsandjawsso
2. Referenced Documents
that the specimen can be gripped tightly and held in alignment
2.1 ASTM Standards:
as the load, accurate within 62 %, is applied.
D907 Terminology of Adhesives
6. Test Specimens
D1002 Test Method for Apparent Shear Strength of Single-
Lap-Joint Adhesively Bonded Metal Specimens by Ten-
6.1 Use test specimens conforming to the shape and dimen-
sion Loading (Metal-to-Metal)
sions shown in Fig. 1, having grip ends suitable for use in the
particular testing machine. These specimens are similar to the
3. Terminology
tension lap-shear specimens described in Test Method D1002.
3.1 Definitions—Many terms in this test method are defined
6.2 Testatleast25specimensshallbetested,representingat
in Terminology D907.
least 4 different panels.
6.3 Prepare, cut, finish, and condition the specimens in the
4. Significance and Use
same manner as forTest Method D1002. Employ an overlap of
4.1 While this test method is intended for use in metal-to-
9.5 mm (0.38 in.) for 1.63-mm (0.064-in.) aluminum alloys.
metal applications it may be used for measuring the fatigue
Ensure that the dimensions of other materials are such that
properties of adhesives using plastic adherends, provided
failures occur in the bond. (An overlap of 12.7 mm (0.50 in.)
consideration is given to the thickness of the plastic adherends.
for 6.4-mm (0.25-in.) thick nonmetals should be used if
possible.)
This test method is under the jurisdiction of ASTM Committee D14 on
7. Procedure
Adhesives and is the direct responsibility of Subcommittee D14.80 on Metal
Bonding Adhesives.
7.1 Unless otherwise specified, test the specimens in an
Current edition approved Oct. 1, 2012. Published October 2012. Originally
atmosphere maintained at 50 6 4 % relative humidity and 23
approved in 1973. Last previous edition approved in 2005 as D3166 – 99 (2005).
6 1.1°C (73.5 6 2°F). Precondition the specimens for at least
DOI: 10.1520/D3166-99R12.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 16 h.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.2 Place the specimen in the jaws of the testing machine
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. and grip tightly so that the specimen and the jaws are perfectly
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