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

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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 This standard does not purport to address all of the safety problems, 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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09-May-1999
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ASTM D3166-99 - 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Standard Test Method for
Fatigue Properties of Adhesives in Shear by Tension
Loading (Metal/Metal)
This standard is issued under the fixed designation D 3166; 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 (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. Scope the material specification. When no thickness is specified,
metal adherends 1.63 mm (0.064 in.) thick are recommended.
1.1 This test method covers the measurement of fatigue
strength in shear by tension loading of adhesives on a standard
5. Apparatus
specimen and under specified conditions of preparation, load-
5.1 Testing Machine,capableofapplyingasinusoidalcyclic
ing, and testing.
axialload.Thecyclicrateandtypeofequipment(constantload
1.2 This standard does not purport to address all of the
or constant displacement) can influence test results. For this
safety concerns, if any, associated with its use. It is the
reason, the cyclic rate and equipment should be specified in the
responsibility of the user of this standard to establish appro-
material specification. When no cyclic rate is specified 1800
priate safety and health practices and determine the applica-
cycles/minisrecommended.Employsuitablegripsandjawsso
bility of regulatory limitations prior to use.
that the specimen can be gripped tightly and held in alignment
2. Referenced Documents as the load, accurate within 62 %, is applied.
2.1 ASTM Standards:
6. Test Specimens
D 907 Terminology of Adhesives
6.1 Use test specimens conforming to the shape and dimen-
D 1002 Test Method forApparent Shear Strength of Single-
sions shown in Fig. 1, having grip ends suitable for use in the
Lap-Joint Adhesively Bonded Metal Specimens by Ten-
particular testing machine. These specimens are similar to the
sion Loading (Metal-to-Metal)
tension lap-shear specimens described in Test Method D 1002.
3. Terminology 6.2 Testatleast25specimensshallbetested,representingat
least 4 different panels.
3.1 Definitions—Many terms in this test method are defined
6.3 Prepare, cut, finish, and condition the specimens in the
in Terminology D 907.
samemannerasforTestMethodD 1002.Employanoverlapof
4. Significance and Use 9.5 mm (0.38 in.) for 1.63-mm (0.064-in.) aluminum alloys.
Ensure that the dimensions of other materials are such that
4.1 While this test method is intended for use in metal-to-
failures occur in the bond. (An overlap of 12.7 mm (0.50 in.)
metal applications it may be used for measuring the fatigue
for 6.4-mm (0.25-in.) thick nonmetals should be used if
properties of adhesives using plastic adherends, provided
possible.)
consideration is given to the thickness of the plastic adherends.
Doublers may be required for plastic adherends to prevent
7. Procedure
bearing failure in the adherends.
7.1 Unless otherwise specified, test the specimens in an
4.2 A variation in the thickness of the adherends can
atmosphere maintained at 50 6 4 % relative humidity and 236
influence the test results. For this reason, the thickness of the
1.1°C (73.5 6 2°F). Precondition the specimens for at least 16
sheets used to make the test specimens should be specified in
h.
7.2 Place the specimen in the jaws of the testing machine
and grip tightly so that the specimen and the jaws are perfectly
This test method is under the jurisdiction of ASTM Committee D-14 on
Adhesives and is the direct responsibility of Subcommittee D14.80 on Metal
aligned in such a position that an imaginary vertical line would
Bonding Adhesives.
pass through the center of the bonded area and through the
Current edition approved May 10, 1999. Published August 1999. Originally
points of suspension (Fig. 1). Ensure that the edge of the lap is
published as D 3166–73. Last previous edition D 3166–93.
Annual Book of ASTM Standards, Vol 15.06. 25.4 mm (1 in.) from the edge of the g
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