ASTM D5961 PDF
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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Load at failure and hole deformation are measured. 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.
astn Give one of our application engineers a call today for help with creating the best budget and testing plan according to ASTM D Procedure B is actually a specimen support fixture and is described in Section H-1 of this product catalog.
The range of acceptable test laminates and thicknesses are described in 8. Have a question about conducting the test for this standard?
ASTM D5961 Double Shear Fixture for Bearing Composite Laminate | GD5961-A
Procedure D of ASTM D loads the laminate bearing specimen in double shear through a close-tolerance, lightly torqued fastener or pin. Active view current version of standard. That is, a single shear plane is developed in the loading pin as the tensile load is applied. Properties, in the test direction, which may be obtained from this test method include the following: Sources of Additional Information:.
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 lightly torqued.
ASTM D 5961 TESTING FIXTURE – PROCEDURE B
Link to Active This link will always route to the current Active version of the standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. An alternate version of the test fixture shown in Figs. The end of the fixture with the spacer in place is gripped in a standard tensile wedge grip.
The applied compressive loading induces a double shear in both the specimen and the loading fastener or pin. A pin or fastener is inserted in the hole, the fastener being torqued as desired. 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.
This simple test fixture is shown in Fig.
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Combining values from the two systems may result in nonconformance with the 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.
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.
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. Standard specimen configurations using fixed values of test parameters are described for each procedure.
The unstabilized configuration is intended for tensile loading and the stabilized configuration is intended for compressive loading although tensile loading is permitted.
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. 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.
Within the text the inch-pound units are shown in brackets. 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. 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. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM D Double Shear Fixture for Bearing Composite Laminate | GDA
The free end of the specimen is held in a second 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 Procedure B specimen may be tested in either an unstabilized no support fixture or stabilized configuration. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. However, when fully documented in the test report, a number of test parameters may be optionally varied.
By means of our plastic testing expertise and modular product design, we will help find the testing solution that is right for you. However, when fully documented in the test report, a number of test parameters may be optionally varied.
Testing Procedure The test methods are as follows. 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 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 two halves of the fixture are separated by a spacer not provided of the same thickness as the specimen being tested.
The specimen is kept short enough to avoid buckling.
ASTM D TESTING FIXTURE – PROCEDURE B
The range of acceptable test laminates and thicknesses are described in 8. Combining values from the two systems may result in non-conformance with the standard. Properties, in the test atsm, which may be obtained from this test method include the following:.