ASTM D3163-01

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Designation: D 3163 – 01
Standard Test Method for
Determining Strength of Adhesively Bonded Rigid Plastic
1
Lap-Shear Joints in Shear by Tension Loading
This standard is issued under the fixed designation D 3163; 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.
1. Scope than mechanically fastened joints, particularly the alleviation
of stress raisers and stress cracking, there is a need for standard
1.1 ThistestmethodisintendedtocomplementTestMethod
tests by which joints of various plastic substrates and adhesives
D 1002 and extend its application to single-lap shear adhesive
can be compared. This test method is intended to meet such a
joints of rigid plastic adherends. The test method is useful for
need.
generating comparative shear strength data for joints made
4.2 This test method is limited to test temperatures below
from a number of plastics. It can also provide a means by
the softening point of the subject adherends, and is not
which several plastic surface treatments can be compared.
intended for use on anisotropic adherends such as reinforced
1.2 The values stated in SI units are to be regarded as the
plastic laminates.
standard. The values in parentheses are for information only.
4.3 The misuse of strength values obtained from this test
1.3 This standard does not purport to address all of the
method as allowable design-stress values for structural joints
safety concerns, if any, associated with its use. It is the
could lead to product failure, property damage, and human
responsibility of the user of this standard to establish appro-
injury. The apparent shear strength of an adhesive obtained
priate safety and health practices and determine the applica-
from a given small single-lap specimen may differ from that
bility of regulatory limitations prior to use.
obtained from a joint made with different adherends or by a
2. Referenced Documents different bonding process. The normal variation of temperature
and moisture in the service environment causes the adherends
2.1 ASTM Standards:
2
and the adhesive to swell and shrink. The adherends and
D 907 Terminology of Adhesives
adhesive are likely to have different thermal and moisture
D 1002 Test Method forApparent Shear Strength of Single-
coefficients of expansion. Even in small specimens, short-term
Lap-Joint Adhesively Bonded Metal Specimens by Ten-
2
environmental changes can induce internal stresses or chemical
sion Loading (Metal-to-Metal)
changes in the adhesive that permanently affect the apparent
D 2093 PracticeforPreparationofSurfacesofPlasticsPrior
2
strength and other mechanical properties of the adhesive. The
to Adhesive Bonding
problem of predicting joint behavior in a changing environ-
D 4896 Guide for Use of Adhesive-Bonded Single Lap-
2
ment is even more difficult if a different type of adherend is
Joint Specimen Test Results
used in a larger structural joint than was used in the small
3. Terminology
specimen.
4.3.1 The apparent shear strength measured with a single-
3.1 Definitions—Many of the terms used in this test method
lap specimen is not suitable for determining allowable design
are defined in Terminology D 907.
stresses for designing structural joints that differ in any manner
4. Significance and Use
from the joints tested without thorough analysis and under-
standing of the joint and adhesive behaviors.
4.1 Due to the increased use of adhesive-bonded plastics as
4.3.2 Single-lap tests may be used for comparing and
a result of the inherent advantages afforded by bonded rather
selecting adhesives or bonding processes for susceptibility to
fatigue and environmental changes, but such comparisons must
1
This test method is under the jurisdiction of ASTM Committee D14 on
be made with great caution since different adhesives may
Adhesives and is the direct responsibility of Subcommittee D14.40 onAdhesives for
respond differently in different joints. See Guide D 4896 for
Plastics.
further discussion of the concepts relative to interpretation of
Current edition approved March 10, 2001. Published May 2001. Originally
published as D 3163 – 73. Last previous edition D 3163 – 96. adhesive bonded single-lap joints.
2
Annual Book of ASTM Standards, Vol 15.06.
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D 3163
5. Apparatus comparative purposes when the investigator is certain that the
specimen configurations and joint geometries of the specimens
5.1 Testing Machine, conforming to the requirements of and
being com
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