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 test fixture is shown in Fig. Procedures A and D, the double-shear configurations, with a single fastener loaded in shear and reacted by laminate tension or compression, qstm particularly recommended for basic material evaluation and comparison. Obviously, a piece of the same test material can be used as a spacer, if desired.
However, when fully documented in the test report, a number of test parameters may be optionally varied. 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.
ASTM D Double Shear Fixture for Bearing Composite Laminate | GDA
Properties, in the test direction, which may be obtained from this test method include the following: 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. The unstabilized configuration is intended for tensile loading and the stabilized configuration is intended for compressive loading although wstm loading is permitted.
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 asgm always route to the current Active version of the standard. 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 Procedure B specimen may be tested in either an unstabilized no support fixture or stabilized configuration.
ASTM D5961 Double Shear Fixture for Bearing Composite Laminate | GD5961-A
An alternate version of the test fixture shown in Figs. Procedure D of ASTM D loads the laminate bearing specimen in double shear through a close-tolerance, lightly torqued fastener or 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. 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 two lower components of the fixture are spread apart to permit inserting the 1. The maximum force attained and the deformation of the hole in the specimen are recorded.
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.
ASTM D Polymer Matrix Composite Laminate Bearing Strength Test Equipment
By means of our plastic testing expertise and modular product design, we will help find the testing solution that is right for you. Astk values stated in each system are not exact equivalents; therefore, each system must be qstm independently of the other.
The test methods are as follows. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
However, when fully documented in the test report, a number of test parameters may be optionally varied. 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. Historical Version s – view previous versions of standard. 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.
A pin or fastener is inserted in the hole, the fastener being torqued as desired. Each half of the fixture is 0. We are confident that we have what you are looking for.
Give one of our application engineers a call today for help with creating the best budget and testing plan according to ASTM D Wyoming Test Fixtures Inc. Or a pin can be used. Sources of Additional Information:. 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 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. 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.
Have a question about conducting the test for this standard? Combining values from the two systems may result in nonconformance with the standard.
Combining values from the two systems may result in non-conformance with 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. That is, a single shear plane is developed in the loading pin as the tensile load is applied. These Procedure B and C configurations have been extensively used in the development of design allowables data.
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.
Link to Active This link will always route to the current Active version of the standard.
ASTM D5961 Polymer Matrix Composite Laminate Bearing Strength Test Equipment
Sometimes the customer has a requirement to test non-standard specimen sizes, requiring Wyoming Test Fixtures, Inc. Standard specimen configurations using fixed values of test parameters are described for each procedure. The specimen is placed on the right surface of the test fixture, aligning the hole in the end of axtm specimen with the hole shown in the fixture astj a fastener inserted and lightly torqued.
Note that the scope of this test method is limited to bearing and fastener failure modes.