ASTM D4501-95

Standard Test Method for Shear Strength of Adhesive Bonds Between Rigid Substrates by the Block-Shear Method

SCOPE
1.1 This test method describes a procedure and fixture used to determine shear strengths of adhesives used to bond materials with moduli higher than the modulus of the adhesive. The size and shape of the specimens are variable within the physical restraints of the fixture.
1.2 The values stated in SI units are to be regarded as the standard.  
1.2  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.

General Information

• Status: Historical
• Publication Date: 09-Mar-2001
• ICS: 83.180 - Adhesives
• Technical Committee: D14 - Adhesives
• Drafting Committee: D14.40 - Adhesives for Plastics

Relations

• Replaced By: ASTM D4501-01 - Standard Test Method for Shear Strength of Adhesive Bonds Between Rigid Substrates by the Block-Shear Method
• Effective Date: 10-Mar-2001
• Referred By: ASTM D6465-99(2016) - Standard Guide for Selecting Aerospace and General Purpose Adhesives and Sealants
• Effective Date: 10-Mar-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 4501 – 95
Standard Test Method for
Shear Strength of Adhesive Bonds Between Rigid
Substrates by the Block-Shear Method
This standard is issued under the fixed designation D 4501; 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 6. Apparatus
1.1 This test method describes a procedure and fixture used 6.1 Testing Machine, with a capacity of not less than 44 kN
to determine shear strengths of adhesives used to bond mate- (10 000 lbf) in tension. Testing machine shall conform to the
rials with moduli higher than the modulus of the adhesive. The requirements of Practices E 4.
size and shape of the specimens are variable within the 6.2 Shearing Fixture— Perform the tests by using a shear-
physical restraints of the fixture. ing fixture consisting of a holding block and a shearing tool
1.2 The values stated in SI units are to be regarded as the (Figs. 1 and 2). The holding block can accommodate speci-
standard. mens up to 80 by 80 by 13 mm (3 by 3 by ⁄2 in.). For small
1.3 This standard does not purport to address all of the specimens as shown in Fig. 3B, an adapter plate (Fig. 4) can be
safety concerns, if any, associated with its use. It is the inserted into the holding block to keep the shearing blade
responsibility of the user of this standard to establish appro- within its guides and to locate the specimen under the clamp.
priate safety and health practices and determine the applica- The shearing blade can accommodate specimens up to 30 by 30
1 1 1
bility of regulatory limitations prior to use. by 13 mm (1 ⁄8 by 1 ⁄8 by ⁄2 in.).
2. Referenced Documents 7. Test Specimens
2.1 ASTM Standards: 7.1 Test specimens can be any size within the limits of the
D 907 Terminology of Adhesives shearing fixture capacity, as given in 6.2. Suggested sizes are as
E 4 Practices for Force Verification of Testing Machines follows:
7.1.1 Metal Blocks—25by25by6mm(1by1by ⁄4 in.).
3. Terminology
7.1.2 Ferrite or Ceramic Blocks—25 by 18 by 13 mm (1 by
3 1
3.1 Many terms used in this test method are defined in ⁄4 by ⁄2 in.).
Terminology D 907.
7.1.3 Wood or Plastic Blocks—25 by 25 by 13 mm (1 by 1
by ⁄2 in.).
4. Summary of Test Method
7.1.4 Glass Plates—75by75by13mm(3by3by ⁄2 in.).
4.1 In this test method, blocks, plates, or disks are bonded
7.2 Prepare the adhesive and apply in accordance with the
together, and the maximum force to shear them apart is
recommendations of the adhesive manufacturer. Assemble the
determined.
adhesive-coated specimens, and bond them in accordance with
the procedure under investigation.
5. Significance and Use
NOTE 1—Assemble the thrust surfaces, where the straight-sided speci-
5.1 This test method provides an estimate of the shear
men contacts the fixture, so that they are parallel to the fixture within
strength of an adhesive on various machinable and nonmachin-
0.005 in./in. (0.005 mm/mm). Center round or shaped specimens within
able substrate materials. It is particularly applicable for testing
the shear blade in such a way that a moment is not applied to the specimen
bonds between ceramic, glass, magnet moldings, and plastic
during shearing.
parts with one flat face where machining would be difficult or
7.3 Remove any flash or fillets on the loaded side prior to
impractical.
testing. Fig. 3 shows typical specimens after bonding.
7.4 Test at least five specimens for each test condition.
8. Procedure
This test method is under the jurisdiction of ASTM Committee D-14 on
8.1 Mount the shear fixture in the testing machine with the
Adhesives and is the direct responsibility of Subcommittee D14.40 on Adhesives for
Plastics. holding block on top.
Current edition approved Sept. 10, 1995.
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