This standard is issued under the fixed designation D ; the number immediately following fication System D lists the ASTM materials standards that. ASTM D , defines a punch-type of shear test. This test method covers the procedure for determining the shear strength of composite materials in the form of . Description: Description: tn_THSASTM-D THS Shear punch fixture. to test shear strength of plastics by punch tool according to ASTM-D
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ASTM D732 – Shear Strength Testing of Plastics
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Shear strength testing is used to determine the load at which a plastic or film will yield when sheared between two metal edges. Shear strength results are important to designers of film and sheet products that tend to be subjected to shear loads, or in applications where applied crushing loads are a risk. ASTM D test procedure: The test is performed by clamping a test sample attached to a 1-inch punch between two metal fixtures.
A male punch is then forced through the hole in the metal fixture causing shear along the edge of the hole. A universal testing machine is used to push the punch until shearing of the specimen occurs.
ASTM-D – Grip-Engineering
The specimens are usually 2 inich diameter discs or 2 inch squared plates and thickness ranging between 0. The results are expressed as shear strength and are given in the units of MPa or psi. The shear strength is calculated by dividing the force required to shear the specimen by the area of the sheared edge.
The area of the sheared edge is equal to the circumference of the punch multiplied by the thickness of the specimen.
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ASTM D TESTING FIXTURE
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