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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Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. It is the responsibility of the user of d5916 standard to establish appropriate safety and health practices and determine the applicability of adtm limitations prior to use. 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.
These Procedure B and C configurations have been extensively used in the development of design allowables data.
However, when fully documented in the test report, a number of test parameters x5961 be optionally varied. Active view current version of standard. 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. Standard specimen configurations using fixed values of test parameters are described for each procedure.
Or a pin can be used.
ASTM D Double Shear Fixture for Bearing Composite Laminate | GDA
The range of acceptable test laminates and thicknesses are described in 8. Historical Version s – view previous versions of standard.
The two halves of the fixture are separated by a spacer not provided of the same thickness as the specimen being tested. Each half of the fixture is 0.
The free end of the specimen is held in a second tensile wedge grip. This simple test fixture is shown in Fig. The standard test specimen is 5. The maximum force attained and the deformation of the hole in the specimen are recorded. While this test method may be referenced as guidance in astj bypass test programs, the scope of this test method is limited to bearing failure modes.
Since a raised boss is present at the r5961 hole, the opposite end of the fixture is thicker by an equal amount so that the specimen is uniformly supported when gripped.
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. Sometimes the customer has a requirement to test non-standard zstm sizes, requiring Wyoming Test Fixtures, Inc. The test fixture is shown in Fig. The end of the fixture with the spacer in place is gripped in a standard tensile wedge grip. 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.
The two lower components of the fixture are spread apart to permit inserting the 1. The unstabilized configuration is intended for tensile loading and the stabilized configuration is intended for compressive loading although tensile loading is permitted.
ASTM D5961 Double Shear Fixture for Bearing Composite Laminate | GD5961-A
A pin or fastener is inserted in the hole, the fastener being torqued as desired. 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.
The applied compressive loading induces a double shear in both the specimen and the loading fastener or pin. 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.
Load at failure and hole deformation are measured. Obviously, a piece of the same test material can be used as a spacer, if desired. Standard specimen configurations using fixed values of xstm parameters are described for each procedure. Sources of Additional Information:. 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 values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
The flat tang at the top of the test fixture is gripped in a wedge grip and a tensile force is applied to the lower end of the specimen. Combining values from the two systems may result in non-conformance with the standard. An alternate version of the test fixture shown in Figs.