Standard Test Method for Strength Properties of Adhesively Bonded Plastic Lap-Shear Sandwich Joints in Shear by Tension Loading

SCOPE
1.1 This test method is intended to complement Test Method D1002 and extend its application to single-lap-shear adhesive joints employing plastic adherends. The test method is useful for generating comparative shear strength data for joints made from a number of plastics. It can also provide a means by which several plastics surface treatments can be compared.  
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 whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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Publication Date
09-Sep-1997
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ASTM D3164-97 - Standard Test Method for Strength Properties of Adhesively Bonded Plastic Lap-Shear Sandwich Joints in Shear by Tension Loading
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 3164 – 97
Standard Test Method for
Strength Properties of Adhesively Bonded Plastic Lap-Shear
Sandwich Joints in Shear by Tension Loading
This standard is issued under the fixed designation D 3164; 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 3. Terminology
1.1 This test method is intended to complement Test Method 3.1 Definitions—Many terms in this test method are defined
D 1002 and Test Method D 3163 and extend its application to in Terminology D 907.
single-lap-shear adhesive joints employing plastic adherends.
4. Significance and Use
The test method is useful for generating comparative shear
4.1 Due to the increased use of adhesively bonded plastics
strength data for joints made from a number of plastics. It can
also provide a means by which several plastics surface treat- as a result of the inherent advantages afforded by bonded rather
than mechanically fastened joints, particularly the alleviation
ments can be compared.
of stress risers and stress cracking, there is a need for standard
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information tests by which joints of various substrates and adhesives can be
compared. This test method is intended to meet such a need.
only.
4.2 This test method is limited to test temperatures below
NOTE 1—A complete metric companion to Test Method D 3164 has
the softening point of the subject adherends, and is not
been developed - D 3164M.
intended for use on anisotropic adherends such as reinforced
1.3 This standard does not purport to address all of the
plastic laminates.
safety concerns, if any, associated with its use. It is the
4.3 The misuse of strength values obtained from this test
responsibility of the user of this standard to establish appro-
method as design stress allowable values for structural joints
priate safety and health practices and determine the applica-
could lead to product failure, property damage, and human
bility of regulatory limitations prior to use.
injury.
4.4 The apparent shear strength of an adhesive obtained
2. Referenced Documents
from a given small single-lap specimen may differ from that
2.1 ASTM Standards:
obtained from a joint made with different adherends or by a
D 907 Terminology of Adhesives
different bonding process. The normal variation of temperature
D 1002 Test Method for Apparent Shear Strength of Single-
and moisture in the service environment causes the adherends
Lap-Joint Adhesively Bonded Metal Specimens by Ten-
and the adhesive to swell and shrink. The adherends and
sion Loading (Metal-to-Metal)
adhesive are likely to have different thermal and moisture
D 2093 Practice for Preparation of Surfaces of Plastics Prior
coefficients of expansion.
to Adhesive Bonding
4.5 Even in small specimens, short-term environmental
D 2651 Guide for Preparation of Metal Surfaces for Adhe-
changes can induce internal stresses or chemical changes in the
sive Bonding
adhesive that permanently affect the apparent strength and
D 3163 Test Method for Determining Strength of Adhe-
other mechanical properties of the adhesive. The problem of
sively Bonded Rigid Plastic Lap-Shear Joints in Shear by
predicting joint behavior in a changing environment is even
Tension Loading
more difficult if a different type of adherend is used in a larger
D 3164M Test Method for Strength Properties of Adhe-
structural joint than was used in the small specimen.
sively Bonded Plastic Lap-Shear Sandwich Joints in Shear
4.6 The apparent shear strength measured with a single-lap
by Tension Loading [Metric]
specimen is not suitable for determining allowable design
D 4896 Guide for Use of Adhesive-Bonded Single Lap-
stresses for designing structural joints that differ in any manner
Joint Specimen Test Results
from the joints tested without thorough analysis and under-
standing of the joint and adhesive behaviors.
4.7 Single-lap tests may be used for comparing and select-
This test method is under the jurisdiction of ASTM Committee D-14 on
ing adhesives or bonding processes for susceptibility to fatigue
Adhesives and is the direct responsibility of Subcommittee D14.40 on Adhesives for
Plastics. and environmental changes, but such comparisons must be
Current edition approved Sept. 10, 1997. Published April 1998. Originally
made with great caution since different adhesives may respond
published as D 3164 – 73. Last previous edition D 3164 – 92a.
differently in different joints. See Guide D 4896 for further
Annual Book of ASTM Standards, Vol 15.06.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D 3164
discussion of the concepts relative to interpretation of adhesive er’s recommendations. Choose the adhesive such that the cure
bonded single lap joints. temperature does not adversely affect the mechanical proper-
ties of the adherend.
5. Apparatus
6.4 Cut test specimens from the bonded panels pictured in
5.1 Testing Machine, conforming to the requirements of and
Fig. 2. Cutting the specimens must be accomplished without
having the capabilities of the machine prescribed in Test
overheating or otherwise physically damaging the adherend or
Method D 1002. Likewise the grips are capable of secure
...

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