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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Have a question about conducting the test for this standard? However, the flexibility of test parameters allowed by these variations makes meaningful comparison between datasets difficult if the datasets were not tested using the same procedure and identical test parameters.
The unstabilized configuration is intended for tensile loading and the stabilized configuration is intended for compressive loading although tensile loading is permitted. 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.
Typically, Procedure D will yield slightly higher strengths than Procedure A due to the finite edge distance, ein Procedure A ; while Procedure C will yield significantly higher strengths than Procedure B due to the larger fastener rotation and higher peak bearing stress in Procedure B.
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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.
ASTM D5961 Polymer Matrix Composite Laminate Bearing Strength Test Equipment
The specimen is kept short enough to avoid buckling. Combining values from the two systems may result in nonconformance with the standard.
Within the text the inch-pound units are shown in brackets. 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.
The Procedure B specimen may be tested in either an unstabilized no support fixture or stabilized configuration. The test fixture is shown in Fig. 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.
ASTM D Double Shear Fixture for Bearing Composite Laminate | GDA
Standard specimen configurations using fixed values of test parameters are described for each procedure. 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. Active view current version of standard. Testing Procedure The test methods are as follows. Force range of 5 kN to kN 1, lbf tolbf Adjustable test space The most popular choice for static tension and compression tests These dual column testers are available in both tabletop and floor standing models.
The test methods are as follows. The end of the fixture with the spacer in place is gripped in a standard tensile wedge grip. Each half of the fixture is 0.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided astj part of the standard. 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.
The other three procedures are pin bearing fixtures, as will be described here. The maximum force attained and the deformation of the hole in the specimen are recorded.
Sometimes the customer has a requirement to test non-standard specimen sizes, requiring Wyoming Test Fixtures, Inc. Note that the scope of this test method is limited to bearing and fastener failure modes. The range of acceptable test laminates and thicknesses are described in 8.
ASTM D TESTING FIXTURE – PROCEDURE B
The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other.
The two lower components of the fixture are spread apart to permit inserting the 1. 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.
ASTM D5961 Double Shear Fixture for Bearing Composite Laminate | GD5961-A
However, when fully documented in astj test report, a number of test parameters may be optionally varied. Combining values from the two systems may result in non-conformance with the standard.
The applied compressive loading induces a double shear in both the specimen and the loading fastener or pin. By means of our plastic testing expertise and modular product design, we zstm help find the testing solution that is right for you. 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 composite material forms are limited to continuous-fiber or discontinuous-fiber tape or fabric, or both reinforced composites for which d55961 laminate is balanced and symmetric with respect to the test direction.
Historical Version s – view previous versions of standard.
Sources of Additional Information: Obviously, a piece of the same test material can be used as a spacer, if desired. The two halves of the fixture are separated by a spacer not provided of the same thickness as the specimen being tested.
The standard configuration for each procedure is very specific and is intended primarily d59961 development of quantitative double- and single-shear bearing response data for material comparison and structural design.
Link to Active This link will always route to the current Active version of the standard. 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.
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. The upper end of the fixture is held in a grip, as is the lower end of the test specimen. Load at failure and hole deformation are measured.
These Procedure B and C configurations have been extensively used in the development of design allowables data.
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. The standard test specimen is 5. Sources of Additional Information:. Or a pin can be used.