Plastics Technology Laboratories  

Shear of Composite Materials by the V-Notched Beam Method

ASTM D5379

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The test determines shear strain, shear stress and shear modulus. The data can be used for research and development purposes concerning interply strength or prove useful in comparing composite materials.

Test Procedure:
A notched beam specimen is placed in a shear fixture. Strain gages can be applied to both sides of the specimen to assure that shear and not twisting occurs and failure must occur by shear. A load is applied at a specified rate until specimen failure occurs.

Specimen size:
The test specimens are 76 x 11 mm at composite thickness with a V notch above and below the 11mm dimension.

Shear Stress/Ultimate Strength, Shear Strain, Ultimate Strain and Shear Cord Modulus of elasticity are calculated.

Equipment Used:
Instron Universal Tester
Shear Fixture
Computerized Strain Gage Measuring System

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**Please note that this test description is intentionally generic in nature and aimed at providing a descriptive summary to enhance test understanding. For more information please contact a Intertek PTL Technical Representative at . Due to copyright restrictions, we are not able to provide copies of standards. Standards can be obtained from appropriate standards authorities.

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