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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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.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The Procedure B specimen may be tested in either an unstabilized no support fixture or stabilized configuration. Within the text the inch-pound units are shown in brackets. However, when fully documented in the test report, a number of test parameters may be optionally varied.

Wyoming Test Fixtures Inc. The free end d591 the specimen is held in a second tensile wedge grip. Xstm standard test specimen is 5.

The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Link to Active This link will always route to the current Active version of the standard. The range of acceptable test laminates and thicknesses are described in 8. The two lower components of the fixture are spread apart to permit inserting the 1. Active view current version of standard.

Sometimes the customer has a requirement to test non-standard specimen sizes, requiring Wyoming Test Fixtures, Inc. Combining values from the two systems may result in nonconformance with the standard.

Asstm 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. The upper end of the fixture is held in a grip, as is the lower end of the test specimen. The specimen is placed on the right surface of the test fixture, aligning the hole in the end of the specimen with the 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 standard configuration for each procedure is very specific and is intended primarily for development of quantitative double- and single-shear bearing response data f5961 material comparison and structural design.

This simple test fixture is shown in Fig. The properties obtained from this testing standard are the ultimate bearing strength, the offset bearing strength and the stress-strain curve.


Link to Active This link will always route to the current Active version of the standard. The unstabilized configuration is intended for tensile asgm and the stabilized configuration is intended for compressive loading although tensile loading is permitted.

The test fixture is shown in Fig. While this test method may be referenced as guidance in bearing bypass test programs, the scope of this test method is limited to bearing failure modes.

These Procedure B and C configurations have been extensively used in the development of design allowables data. Obviously, a aatm of the same test material can be used as a spacer, if desired. The fixture is shown in Fig. Standard specimen configurations using fixed values of test parameters are described for each procedure. Load at failure and hole deformation are measured. By means of our plastic testing expertise and modular product design, we will help find the testing solution that is right for you.

A tensile load is applied until a maximum loading has been reached, monitoring both applied force and hole deformation, as r5961 in the ASTM standard. The range of acceptable test laminates and thicknesses are described in 8. An alternate version of the test fixture shown in Figs. Procedures A and D, the double-shear configurations, with a single fastener loaded in shear and reacted by laminate tension or compression, are particularly recommended for basic material evaluation and comparison.


Procedure B is 5d961 a specimen support fixture and is described in Section H-1 of this product catalog. The end of the fixture with the spacer in place is gripped in a standard tensile wedge grip.

Properties, in the test direction, which may be astn from this test method include the following:. 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. The other three procedures are pin bearing fixtures, as will be described here. The applied compressive loading induces a double shear in both the atm and the loading fastener or pin.

ASTM D Double Shear Fixture for Bearing Composite Laminate | GDA

Procedure D of ASTM D loads the laminate bearing specimen in double shear through a close-tolerance, lightly torqued fastener or pin. A is double-shear tensile loading, B is single-shear tensile 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.

Give one of our application engineers a call today for help with creating the best budget and testing plan according to ASTM D Sources of Additional Information: Note that the scope of this test method is limited to bearing and fastener failure modes.

For protruding head fasteners, Procedure D will typically yield somewhat higher results than Procedure C due to both stress peaking and finite edge distance in Procedure Cand Procedures A and C yield roughly equivalent results. That is, a single shear plane is developed in the loading pin as the tensile load is applied. As described in Section H-2, the SACMA fixture is much easier to use since the specimen holder is one piece, with adjustable bushings to accommodate variations in specimen thickness.

Each half of the fixture is 0.