ASTM D5656-10
(Test Method)Standard Test Method for Thick-Adherend Metal Lap-Shear Joints for Determination of the Stress-Strain Behavior of Adhesives in Shear by Tension Loading
Standard Test Method for Thick-Adherend Metal Lap-Shear Joints for Determination of the Stress-Strain Behavior of Adhesives in Shear by Tension Loading
SIGNIFICANCE AND USE
This test method can be used to determine the stress-strain properties of an adhesive in shear and to establish the proportional-limit of the stress-stain relationship. This data may be useful for the design and analysis of adhesively bonded joints.
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 considerations.
This test method has been developed and applied using bonded aluminum adherends. At this time no assumptions regarding the validity of this test method with non-aluminum adherends can be made.
SCOPE
1.1 This test method covers the preparation and testing of thick-adherend lap-shear samples for the determination of the stress-strain behavior of adhesives.
1.2 This test method covers data reduction and analysis of stress-strain curves obtained using thick-adherend lap-shear samples.
1.3 The values stated in SI units are to be regarded as the standard. The inch-pound units in parentheses are for information only.
1.4 This standard does not purport to address all of the safety concerns, 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. Specific precautionary statements are given in 7.3.
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Designation: D5656 − 10
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 D5656; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.2 Definitions of Terms Specific to This Standard:
3.2.1 knee, n—inflection point on a load-deflection curve;
1.1 This test method covers the preparation and testing of
the point at which plastic yielding of the adhesive begins to
thick-adherend lap-shear samples for the determination of the
dominate the deformation response of the load-deflection
stress-strain behavior of adhesives.
curve.
1.2 This test method covers data reduction and analysis of
3.2.2 panel, n—two plates of a rigid material having the
stress-strain curves obtained using thick-adherend lap-shear
same dimensions that are adhesively bonded together on one
samples.
face such that the thickness of the panel is approximately twice
1.3 The values stated in SI units are to be regarded as the
the thickness of each individual plate.
standard. The inch-pound units in parentheses are for informa-
4. Summary of Test Method
tion only.
1.4 This standard does not purport to address all of the 4.1 This test method consists of testing thick-adherend
safety concerns, if any, associated with its use. It is the lap-shear samples whereby a tensile load is applied to the
responsibility of the user of this standard to establish appro- sample but the adhesive is placed in shear. Unlike Guide
priate safety and health practices and determine the applica- D4896, the adherends used in this standard test method are
thick and rigid, peel forces are minimized and the shear
bility of regulatory limitations prior to use. Specific precau-
tionary statements are given in 7.3. stress-strain properties of the adhesive are obtained. Refer-
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
D907 Terminology of Adhesives
across the over-lap of the specimen, factors such as adhesive
D2651 GuideforPreparationofMetalSurfacesforAdhesive
stiffness, adherent stiffness and location of shear strain mea-
Bonding
surement along the length of the bond can affect the experi-
D4896 Guide for Use ofAdhesive-Bonded Single Lap-Joint
3,4
mentally obtained load-displacement curve.
Specimen Test Results
E4 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 D907.
strain properties of an adhesive in shear and to establish the
proportional-limit of the stress-stain relationship. This data
1 maybeusefulforthedesignandanalysisofadhesivelybonded
This test method is under the jurisdiction of ASTM Committee D14 on
Adhesives and is the direct responsibility of Subcommittee D14.80 on Metal
joints.
Bonding Adhesives.
Current edition approved Oct. 1, 2010. Published October 2010. Originally
ε1
3
approved in 1995. Last previous edition approved in 2004 as D5656 – 04 . DOI: Kassapoglou, C. and Adelmann, John C., “KGR-1 Thick Adherend Specimen
rd
10.1520/D5656-10. Evaluation for the Determination of Adhesive Mechanical Properties ,” 23
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or International 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 StructuralAdhesives 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 − 10
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-
era
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation:D5656–04 Designation: D5656 – 10
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 D5656; 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 (´) indicates an editorial change since the last revision or reapproval.
1
´ NOTE—Section 7.3 was editorially updated in September 2005.
1. Scope
1.1 This test method covers the preparation and testing of thick-adherend lap-shear samples for the determination of the
stress-strain behavior of adhesives.
1.2 This test method covers data reduction and analysis of stress-strain curves obtained using thick-adherend lap-shear samples.
1.3 ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsinparenthesesareforinformationonly.
1.4 This standard does not purport to address all of the safety concerns, 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. Specific precautionary statements are given in 7.3.
2. Referenced Documents
2
2.1 ASTM Standards:
D907 Terminology of Adhesives
D2651 Guide for Preparation of Metal Surfaces for Adhesive Bonding
D4896 Guide for Use of Adhesive-Bonded Single Lap-Joint Specimen Test Results
E4 Practices for Force Verification of Testing Machines
3. Terminology
3.1 Definitions:
3.1.1 Many terms in this test method are defined in Terminology D907.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 knee, n—inflection point on a load-deflection curve; the point at which plastic yielding of the adhesive begins to dominate
the deformation response of the load-deflection curve.
3.2.2 panel, n—two plates of a rigid material having the same dimensions that are adhesively bonded together on one face such
that the thickness of the panel is approximately twice the thickness of each individual plate.
4. Summary of Test Method
4.1 This test method consists of testing thick-adherend lap-shear samples whereby a tensile load is applied to the sample but
theadhesiveisplacedinshear.UnlikeGuideD4896,theadherendsusedinthisstandardtestmethodarethickandrigid,peelforces
are minimized and the shear stress-strain properties of the adhesive are obtained. Referenced data presents a finite element analysis
3
of the thick-adherent metal lap shear specimen and calculates the effect of varying the adherent and adhesive stiffness. User of
this standard is cautioned that since the stress is not totally uniform across the over-lap of the specimen, factors such as adhesive
1
This test method is under the jurisdiction ofASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.80 on Metal BondingAdhesives.
Current edition approved April 1, 2004. Published April 2004. Originally approved in 1995. Last previous edition approved in 2001 as D5656-01. DOI:
10.1520/D5656-04E01.on Metal Bonding Adhesives
´1
Current edition approved Oct. 1, 2010. Published October 2010. Originally approved in 1995. Last previous edition approved in 2004 as D5656 - 04 . DOI:
10.1520/D5656-10.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3 rd
Kassapoglou, C. andAdelmann, John C., “KGR-1 ThickAdherend Specimen Evaluation for the Determination ofAdhesive Mechanical Properties ,” 23 International
SAMPE Conference, Oct. 21–24, 1991.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D5656 – 10
stiffness, adherent stiffness and location of shear strain measurement along the length of the bond can affect the experimentally
3,4
obtained load-displacement curve.
NOTE 1—The peel forces generated during testing are a function of the bending deformation in the adherends. Greater adherend stiffness results in less
bending and smaller peel forces.
5. Significance and Use
5.1 This test method can be used to determine the stress-strain properties of an adhesive in shear and to establish the
proportional-limit of the stress-stain relations
...
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