ASTM D7078 PDF

ASTM D is a test method used to study the shear properties of a composite material. While the test fixture and set up for this test may look a little complicated, the mechanics and calculations of the test are straightforward. The specialized fixture allows the user to apply very high shear forces due to loads being applied through the specimen faces as opposed to edges. The V-notched specimen shape provides a consistent and localized failure in the gauge area. Forgot your password?

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ASTM D is a test method used to study the shear properties of a composite material. While the test fixture and set up for this test may look a little complicated, the mechanics and calculations of the test are straightforward. The specialized fixture allows the user to apply very high shear forces due to loads being applied through the specimen faces as opposed to edges. The V-notched specimen shape provides a consistent and localized failure in the gauge area.

Forgot your password? Work with us to find the right equipment for your ASTM standard. Summary of Test. Testing Procedure. ASTM D provides recommendations regarding fiber orientations of the specimen and how they will affect test results. Insert the test specimen in the grips according to the procedure described in the test standard. Spacers are used to assist in centering the specimen in the grips, which is essential for accurate results.

Ensure the bonded strain gages are properly mounted to the specimen and zeroed. Tighten the clamping bolts to the specified torque. Mount the test fixture in the test machine. Apply load to the specimen at the specified rate prescribed by the test standard.

Continue the test until failure. Recommended Equipment. We're happy to help! Remember me Login. Sales Support Calibration Calculators.

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ASTM D7078 TESTING FIXTURE

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ASTM D7078 – Shear Properties Testing of Composite Materials by V-Notched Rail Shear

Active view current version of standard. Other Historical Standards. Work Item s - proposed revisions of this standard. More D

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ASTM D7078 Composite V-Notched Rail Shear Testing

Historical Version s - view previous versions of standard. Work Item s - proposed revisions of this standard. More D Either in-plane or interlaminar shear properties may be evaluated, depending upon the orientation of the material coordinate system relative to the loading axis. Factors that influence the shear response and should therefore be reported include: material, methods of material preparation and lay-up, specimen stacking sequence, specimen preparation, specimen conditioning, environment of testing, specimen alignment and gripping, speed of testing, time at temperature, void content, and volume percent reinforcement. Only a single shear plane may be evaluated for any given specimen. Properties, in the test direction, which may be obtained from this test method, include the following:.

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