Standard Test Method for
Fracture Strength in Cleavage of Adhesives in Bonded
Joints1
This standard is issued under the fixed designation D 5041; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of the last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the determination of fracture
strength in cleavage of adhesive bonds when tested on standard
reinforced plastic specimens and under specified conditions of
preparation and testing (Note 1).
NOTE 1—While this test method is intended for use in reinforced plastic
applications, it may be used for measuring fracture properties of adhesives
using other plastic adherends, provided consideration is given to the
thickness and should be of equal rigidity to the plastic adherends.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
only.
1.3 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.
2. Referenced Documents
2.1 ASTM Standards: 2
D 618 Practice for Conditioning Plastics for Testing
D 907 Terminology of Adhesives
D 2093 Practice for Preparation of Surfaces of Plastics Prior
to Adhesive Bonding
D 5573 Practice for Classifying Failure Modes in FiberReinforced-Plastic (FRP) Joints
E 4 Practices for Force Verification of Testing Machines
3. Terminology
3.1 Definitions—Many of the terms used in this test method
are defined in Terminology D 907.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 failure initiation energy, Ei
—the area under the load
deflection curve where the first significant load drop occurs
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