ASTM D3528-96

Designation: D 3528 – 96
Standard Test Method for
Strength Properties of Double Lap Shear Adhesive Joints by
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Tension Loading
This standard is issued under the fixed designation D 3528; 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.
INTRODUCTION
The accuracy of the results of strength tests of adhesive bonds will depend on the conditions under
which the bonding process is carried out. Unless otherwise agreed upon between the manufacturer and
the purchaser, the bonding conditions should be prescribed by the manufacturer of the adhesive. In
order to ensure that complete information is available to the individual conducting the tests, the
manufacturer of the adhesive should furnish numerical values and other specific information for each
of the following variables:
(1) Surface preparation
(2) Mixing directions
(3) Adhesive application
(4) Assembly conditions
(5) Curing conditions
(6) Testing conditions
A range may be prescribed for any variable by the manufacturer of the adhesive if it can be assumed
by the test operator that any arbitrarily chosen value within such a range or any combination of such
values for several variables will be acceptable to both the manufacturer and the purchaser of the
adhesive.
1. Scope B 36 Specification for Brass Plate, Sheet, Strip, and Rolled
3
Bar
1.1 This test method covers the determination of the tensile
B 152 Specification for Copper Sheet, Strip, Plate, and
shear strengths of adhesives for bonding metals when tested in
3
Rolled Bar
an essentially peel-free standard specimen that develops adhe-
B 209 Specification for Aluminum and Aluminum-Alloy
sive stress distribution representative of that developed in a
4
Sheet and Plate
typical low-peel production-type structural joint. The repro-
B 265 Specification for Titanium and Titanium Alloy Strip,
ducibility of the strengths achieved are directly related to
5
Sheet, and Plate
conformance with specified conditions of preparation and
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D 618 Practice for Conditioning Plastics for Testing
testing.
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D 907 Terminology of Adhesives
1.2 This standard does not purport to address all of the
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E 4 Practices for Force Verification of Testing Machines
safety concerns, if any, associated with its use. It is the
E 122 Practice for Choice of Sample Size to Estimate a
responsibility of the user of this standard to establish appro-
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Measure Quality for a Lot or Process
priate safety and health practices and determine the applica-
E 171 Specification for Standard Atmospheres for Condi-
bility of regulatory limitations prior to use.
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tioning and Testing Flexible Barrier Materials
2. Referenced Documents
3. Terminology
2.1 ASTM Standards:
3.1 Definitions—Many terms in this test method are defined
A 167 Specification for Stainless and Heat-Resisting
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Chromium-Nickel Steel Plate, Sheet, and Strip
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Annual Book of ASTM Standards, Vol 02.01.
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Annual Book of ASTM Standards, Vol 02.02.
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This test method is under the jurisdiction of ASTM Committee D-14 on Annual Book of ASTM Standards, Vol 02.04.
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Adhesives and is the direct responsibility of Subcommittee D14.80 on Metal Annual Book of ASTM Standards, Vol 08.01.
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Bonding Adhesives. Annual Book of ASTM Standards, Vol 15.06.
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Current edition approved Sept. 10, 1996. Published November 1996. Originally Annual Book of ASTM Standards, Vol 03.01.
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published as D 3528 – 76. Last previous edition D 3528 – 92. Annual Book of ASTM Standards, Vol 14.02.
2 10
Annual Book of ASTM Standards, Vol 01.03. Annual Book of ASTM Standards, Vol 15.09.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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D 3528
in Terminology D 907.
4. Significance and Use
4.1 This test method is designed to produce shear property
data for the process control and specification of adhesives. This
test method may also be useful for research and development
of adhesives.
4.2 Lap shear properties vary with specimen configuration
preparation, speed, and environment of testing. Consequently,
where precise comparative results are desired, these factors
must be carefully controlled and reported.
5. Apparatus
5.1 Testing Machine, conforming to the requirements of
Practices E 4. The testing machine should be so selected that
T 5 1.6 mm
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the breaking load of the specimens falls between 15 and 85 %
T 5 3.2 mm
2
A 5 Test Gluelines
of the full-scale capacity. The machine should be capable of
B 5 Area in Test Grips
maintaining a rate of loading of 8.27 to 9.65 MPa (1200 to
C 5 Shear areas
1400 psi)/min, or if the rate is dependent on crosshead motion,
FIG. 2 Form and Dimensions of Type B Specimen
the machine should be set to approach the rate of loading. It
should be provided with a suitable pair of self-align
...