ASTM D5868-01(2023)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5868 − 01 (Reapproved 2023)
Standard Test Method for
Lap Shear Adhesion for Fiber Reinforced Plastic (FRP)
Bonding
This standard is issued under the fixed designation D5868; 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 D1002 Test Method for Apparent Shear Strength of Single-
Lap-Joint Adhesively Bonded Metal Specimens by Ten-
1.1 This test method describes a lap shear test for use in
sion Loading (Metal-to-Metal)
measuring the bonding characteristics of adhesives for joining
D2093 Practice for Preparation of Surfaces of Plastics Prior
fiber reinforced plastics to themselves and to metals. The
to Adhesive Bonding
method is applicable to random and fiber oriented FRP.
D3163 Test Method for Determining Strength ofAdhesively
1.2 ThistestmethodisintendedtocomplementTestMethod
Bonded Rigid Plastic Lap-Shear Joints in Shear by Ten-
D1002 and extend the application to single-lap shear adhesive
sion Loading
joints of fiber-reinforced plastic (FRP) adherends. This test
D4896 Guide for Use ofAdhesive-Bonded Single Lap-Joint
method is useful for generating comparative apparent shear
Specimen Test Results
strength data for joints made from a number of FRP materials,
D5573 Practice for Classifying Failure Modes in Fiber-
providing a means by which FRP surface treatments may be
Reinforced-Plastic (FRP) Joints
compared.
E4 Practices for Force Calibration and Verification of Test-
ing Machines
1.3 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical 2.2 SAE Standard:
SAE J1525 Lap Shear Test for Automotive-Type Adhesives
conversions to SI units that are provided for information only
and are not considered standard. for Fiber Reinforced Plastic (FRP) Bonding
1.4 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
3.1 Adhesive terminology for this test method is covered in
responsibility of the user of this standard to establish appro-
Terminology D907.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
4. Summary of Test Method
1.5 This international standard was developed in accor-
4.1 This test method describes a procedure for the testing of
dance with internationally recognized principles on standard-
lap shear bond strengths, using composite materials not rec-
ization established in the Decision on Principles for the
ommended in Test Method D3163 such as FRP.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
5. Significance and Use
Barriers to Trade (TBT) Committee.
5.1 Due to the increased use of adhesively-bonded FRPas a
result of the inherent advantages afforded by bonded rather
2. Referenced Documents
than mechanically-fastened joints (particularly the alleviation
2.1 ASTM Standards:
of stress risers and stress cracking), there is a need for tests by
D907 Terminology of Adhesives
which joints of various FRP substrates and adhesives may be
compared. This test method is intended to meet such a need.
5.2 Additional information on significance and use may be
This test method is under the jurisdiction of ASTM Committee D14 on
found in Guide D4896.
AdhesivesandisthedirectresponsibilityofSubcommitteeD14.40onAdhesivesfor
Plastics.
6. Interference
Current edition approved Jan. 1, 2023. Published January 2023. Originally
approved in 1995. Last previous edition approved in 2014 as D5868 – 01 (2014).
6.1 Apparent shear strength may be affected by substrate
DOI: 10.1520/D5868-01R23.
properties, such as moisture absorption and strength.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Available from Society of Automotive Engineers (SAE), 400 Commonwealth
the ASTM website. Dr., Warrendale, PA 15096-0001, http://www.sae.org.
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D5868 − 01 (2023)
7. Apparatus
7.1 Testing Machine, conforming to the requirements and
having the capabilities of the machine in Practices E4 with
self-aligning grips capable of securely grasping the specimen
throughout the test without allowing the specimen to slip.
8. Procedure
...