Procedure A in ASTM D , has the objective to test composite laminates double-edged. The pin in the device, creating two cutting plans, extracts a segment. ASTM D TESTING FIXTURE – PROCEDURE B. FASTENER BEARING SPECIMEN SUPPORT. Pdf icon button Download PDF. The bearing strength of a . Model No. ASTM.D – Double Shear Fastener Test Fixture. The Double Shear Fixture applies a double shear load via two loading plates secured to the.

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Since a raised boss is present at the pin hole, the opposite end of the fixture is thicker by an equal amount so that the specimen is uniformly supported when gripped.

Load at failure and hole deformation are measured. A is double-shear tensile loading, B is single-shear r5961 or compressive loading of a two-piece specimen, C is single-shear tensile loading of a one-piece specimen, and D is double-shear compressive loading.

The applied compressive loading induces a double shear in both the specimen and the loading fastener or pin. Standard specimen configurations using fixed values of test parameters are described for each procedure.

ASTM D Double Shear Fixture for Bearing Composite Laminate | GDA

The flat tang at the top of r5961 test fixture is ast, in a wedge grip and a tensile force is applied to the lower end of the specimen. That is, the pin in the fixture attempts to shear out a segment of the composite laminate test specimen by creating two shear planes in the pin.

The composite material forms are limited to continuous-fiber or discontinuous-fiber tape or fabric, or both reinforced composites for which the laminate is balanced and symmetric with respect to the test direction.


These Procedure B and C configurations have been extensively used in the development of design allowables data.

Sometimes the customer has a requirement to test non-standard specimen sizes, requiring Wyoming Test Fixtures, Inc.

The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.

ASTM D5961 Polymer Matrix Composite Laminate Bearing Strength Test Equipment

The other three procedures are pin bearing fixtures, as will be described here. The standard configuration for each procedure is very specific and is intended primarily for development of quantitative double- and single-shear bearing response data for material comparison and structural design.

Standard specimen configurations using asttm values of test parameters are described for each procedure. However, when fully asm in the test report, a number of test parameters may be optionally varied. We are confident that we have what you are looking for. Link to Active This link will always route to the current Active aastm of the standard. The ASTM D standard describes several test procedures to obtain data on the bearing response of pinned or fastened joints using multi-directional polymer matrix composite laminates reinforced by high-modulus fibers.

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. The properties obtained from this testing standard are the ultimate bearing strength, the offset bearing strength and the stress-strain curve.

A tensile load is applied until a maximum loading has been reached, monitoring both applied force and hole deformation, as described in the ASTM standard. The range of acceptable test laminates and thicknesses are described in 8.


Procedures B and C, the single-shear, single- or double-fastener configurations are more useful in evaluation of specific joint configurations, including fastener failure modes. Have a question about conducting the test for this standard? The range of acceptable test laminates and thicknesses are described in 8. We offer machines, apparatus, testers, tensile grips, test fixtures, clamps, holders, jigs, faces, jaws, extensometers, environmental and humidity chambers, furnaces, baths and custom solutions for unique applications.

Or a pin can be used. Each half of the fixture is 0. The two lower components of the fixture are spread apart to permit inserting the 1.

The specimen is placed on the right surface of the test fixture, aligning the hole in the end of the specimen with r5961 hole shown in the fixture and a fastener inserted and lightly torqued. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. The two halves of the fixture are separated by a spacer not provided of the same thickness as the specimen being tested.


The end of the fixture with the spacer in place is gripped in a standard tensile wedge grip. The standard test specimen is 5. The upper end of the fixture is held in a grip, as is the lower end of the test specimen.