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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The standard test specimen is 5.
ASTM D Polymer Matrix Composite Laminate Bearing Strength Test Equipment
However, when fully documented in the test report, a number of test parameters may be optionally varied. Link to Active This link will always route to the current Active version of the standard. Standard specimen configurations using fixed values of test parameters are described for each procedure.
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.
ASTM D5961 Polymer Matrix Composite Laminate Bearing Strength Test Equipment
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. 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.
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. 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 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. This simple test fixture is shown in Fig. Procedures B and C, the single-shear, single- or 5d961 configurations are more useful in evaluation of specific joint configurations, including fastener failure modes.
However, the flexibility of test parameters allowed by these variations makes meaningful comparison between datasets difficult if astn datasets were not tested using the same procedure and identical test parameters. The range of acceptable test laminates and thicknesses are described in 8. The two halves of the fixture are separated by a qstm not provided of the same thickness as the specimen being tested. Historical Version s – view r5961 versions of standard. The maximum force attained and the deformation of the hole in the specimen are recorded.
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 sstm are available in both tabletop and floor standing models. Within the text the inch-pound units are shown in brackets. Properties, in the test direction, which may be obtained from this test method include the following: Sources of Additional Information: The applied compressive loading induces a double shear in both the specimen and the loading fastener or pin.
It is the responsibility of the user of this asgm to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Give one of our application engineers a call today for help with creating the best budget and testing plan according to ASTM D Combining values from the two systems may result in nonconformance with the standard.
By means of our plastic testing expertise and modular product design, we will help find the testing solution that is right for you.
The two lower components of the fixture are spread asrm to permit inserting the 1. The upper end of the fixture is held in a grip, as is the lower end of the test specimen. Link to Active This link will always route to the current Active version of the standard. However, when fully documented in the test report, a number f5961 test parameters may be optionally varied. 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.
Have a question about conducting the test for this standard? That is, a single shear plane is developed in the loading pin as the tensile load is applied. Obviously, a piece of the same test material can be used as a spacer, if desired. A pin atm fastener is inserted in the hole, the fastener being torqued as desired.
The Procedure C specimen is particularly well-suited for development of countersunk-fastener bearing strength data where a near-double-shear fastener rotational stiffness is desired.
Or a pin can be used.
We are confident that we have what you are looking for. These Procedure B and C configurations have been extensively used in the development of design allowables data.
The test methods are as follows. The range of acceptable test laminates and thicknesses are described asmt 8. Standard specimen configurations using fixed values of test parameters are described for each procedure. The fixture is shown in Fig.
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. Typically, Procedure D will asttm 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.
ASTM D5961 Double Shear Fixture for Bearing Composite Laminate | GD5961-A
dd5961 Procedures A 5d961 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 other three procedures are pin bearing fixtures, as will be described here. Procedure B is actually a specimen support fixture and is described in Section H-1 of this product catalog.
Testing Procedure The test methods are as follows. The specimen is kept short enough to avoid buckling. Sources of Additional Information:.
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 r5961 torqued. Wyoming Test Fixtures Inc.