Plastics Technology Laboratories  

Short Beam Shear

ASTM D2344

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Short Beam Shear is used to determine interlaminar shear strength of parallel fibers. It is applicable to all types of parallel fiber reinforced plastics and composites. The data can be used for research and development purposes concerned with interply strength, or prove useful in comparing composite materials.

Test Procedure:
The thickness and width of the test specimen are measured before conditioning. The specimen is placed on a horizontal shear test fixture so that the fibers are parallel to the loading nose. The loading nose is then used to flex the specimen at a speed of .05 inches per minute until breakage. The force is then recorded. Calculations are performed to determine shear strength.

Specimen size:
The test specimens are machined from flat, finished composites.

Shear strength =
0.75 x breaking load
width x thickness

Equipment Used:
Instron Universal Testing Machine.
Flex Fixture with Short Beam Shear Heads

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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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