ASTM D5656-04

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Designation: D 5656 – 04
Standard Test Method for
Thick-Adherend Metal Lap-Shear Joints for Determination of
the Stress-Strain Behavior of Adhesives in Shear by
1
Tension Loading
This standard is issued under the fixed designation D 5656; 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 3.2.1 knee, n—inflection point on a load-deflection curve;
the point at which plastic yielding of the adhesive begins to
1.1 This test method covers the preparation and testing of
dominate the deformation response of the load-deflection
thick-adherend lap-shear samples for the determination of the
curve.
stress-strain behavior of adhesives.
3.2.2 panel, n—two plates of a rigid material having the
1.2 This test method covers data reduction and analysis of
same dimensions that are adhesively bonded together on one
stress-strain curves obtained using thick-adherend lap-shear
face such that the thickness of the panel is approximately twice
samples.
the thickness of each individual plate.
1.3 The values stated in SI units are to be regarded as the
standard. The inch-pound units in parentheses are for informa-
4. Summary of Test Method
tion only.
4.1 This test method consists of testing thick-adherend
1.4 This standard does not purport to address all of the
lap-shear samples whereby a tensile load is applied to the
safety concerns, if any, associated with its use. It is the
sample but the adhesive is placed in shear. Unlike Guide
responsibility of the user of this standard to establish appro-
D 4896, the adherends used in this standard test method are
priate safety and health practices and determine the applica-
thick and rigid, peel forces are minimized and the shear
bility of regulatory limitations prior to use. Specific precau-
stress-strain properties of the adhesive are obtained. Refer-
tionary statements are given in 7.3.
enced data presents a finite element analysis of the thick-
2. Referenced Documents adherent metal lap shear specimen and calculates the effect of
3
2
varying the adherent and adhesive stiffness. User of this
2.1 ASTM Standards:
standard is cautioned that since the stress is not totally uniform
D 907 Terminology of Adhesives
across the over-lap of the specimen, factors such as adhesive
D 2651 Guide for Preparation of Metal Surfaces for Adhe-
stiffness, adherent stiffness and location of shear strain mea-
sive Bonding
surement along the length of the bond can affect the experi-
D 4896 Guide for Use of Adhesive-Bonded Single Lap-
,
3 4
mentally obtained load-displacement curve.
Joint Specimen Test Results
E 4 Practices for Force Verification of Testing Machines
NOTE 1—The peel forces generated during testing are a function of the
bending deformation in the adherends. Greater adherend stiffness results
3. Terminology
in less bending and smaller peel forces.
3.1 Definitions:
5. Significance and Use
3.1.1 Many terms in this test method are defined in Termi-
5.1 This test method can be used to determine the stress-
nology D 907.
strain properties of an adhesive in shear and to establish the
3.2 Definitions of Terms Specific to This Standard:
proportional-limit of the stress-stain relationship. This data
maybeusefulforthedesignandanalysisofadhesivelybonded
1
joints.
This test method is under the jurisdiction of ASTM Committee D14 on
Adhesives and is the direct responsibility of Subcommittee D14.80 on Metal
Bonding Adhesives.
3
Current edition approved April 1, 2004. Published April 2004. Originally Kassapoglou, C. and Adelmann, John C., “KGR-1 Thick Adherend Specimen
rd
approved in 1995. Last previous edition approved in 2001 as D 5656 - 01. Evaluation for the Determination of Adhesive Mechanical Properties,” 23 Inter-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or national SAMPE Conference, Oct. 21–24, 1991.
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Krieger, R. B., Jr., “Stiffness Characteristics of Structural Adhesives for Stress
Standards volume information, refer to the standard’s Document Summary page on Analysis in Hostile Environment,” American Cyanamid Co., Havre de Grace, MD,
the ASTM website. 1975.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D5656–04
5.2 This test method is not intended to determine adhesion
characteristics of an adhesive to a particular substrate; rather
this test method is intended to characterize the adhesive shear
stress-strain properties that may be relevant for design consid-
erations
...