ASTM D3166-99(2020)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D3166 − 99 (Reapproved 2020)
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 4. Significance and Use
1.1 This test method covers the measurement of fatigue
4.1 While this test method is intended for use in metal-to-
strength in shear by tension loading of adhesives on a standard
metal applications it may be used for measuring the fatigue
specimen and under specified conditions of preparation,
properties of adhesives using plastic adherends, provided
loading, and testing.
consideration is given to the thickness of the plastic adherends.
1.2 The values stated in SI units are to be regarded as the
Doublers may be required for plastic adherends to prevent
standard. The values given in parentheses are for information
bearing failure in the adherends.
only.
4.2 A variation in the thickness of the adherends can
1.3 This standard does not purport to address all of the
influence the test results. For this reason, the thickness of the
safety concerns, if any, associated with its use. It is the
sheets used to make the test specimens should be specified in
responsibility of the user of this standard to establish appro-
the material specification. When no thickness is specified,
priate safety, health, and environmental practices and deter-
metal adherends 1.63 mm (0.064 in.) thick are recommended.
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
5. Apparatus
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5.1 Testing Machine,capableofapplyingasinusoidalcyclic
Development of International Standards, Guides and Recom-
axialload.Thecyclicrateandtypeofequipment(constantload
mendations issued by the World Trade Organization Technical
or constant displacement) can influence test results. For this
Barriers to Trade (TBT) Committee.
reason, the cyclic rate and equipment should be specified in the
material specification. When no cyclic rate is specified 1800
2. Referenced Documents
cycles/minisrecommended.Employsuitablegripsandjawsso
2.1 ASTM Standards:
that the specimen can be gripped tightly and held in alignment
D907 Terminology of Adhesives
as the load, accurate within 62 %, is applied.
D1002 Test Method for Apparent Shear Strength of Single-
Lap-Joint Adhesively Bonded Metal Specimens by Ten-
6. Test Specimens
sion Loading (Metal-to-Metal)
6.1 Use test specimens conforming to the shape and dimen-
3. Terminology sions shown in Fig. 1, having grip ends suitable for use in the
particular testing machine. These specimens are similar to the
3.1 Definitions—Many terms in this test method are defined
tension lap-shear specimens described in Test Method D1002.
in Terminology D907.
6.2 At least 25 specimens shall be tested, representing at
least 4 different panels.
This test method is under the jurisdiction of ASTM Committee D14 on
Adhesives and is the direct responsibility of Subcommittee D14.80 on Metal
6.3 Prepare, cut, finish, and condition the specimens in the
Bonding Adhesives.
same manner as forTest Method D1002. Employ an overlap of
Current edition approved Jan. 1, 2020. Published January 2020. Originally
9.5 mm (0.38 in.) for 1.63-mm (0.064-in.) aluminum alloys.
approved in 1973. Last previous edition approved in 2012 as D3166 – 99 (2012).
DOI: 10.1520/D3166-99R20.
Ensure that the dimensions of other materials are such that
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
failures occur in the bond. (An overlap of 12.7 mm (0.50 in.)
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
for 6.4-mm (0.25-in.) thick nonmetals should be used if
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. possible.)
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D3166 − 99 (2020)
NOTE 1—Minimum specimen length in the grip 2
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