Due to the very large number of tests offered, descriptions of those most commonly requested have been gathered into the following groups:

ASTM D3846 – In-Plane Shear Strength Testing of Reinforced Plastics

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ASTM D3846 testing is used to determine the in-plane shear strength of reinforced thermosetting flat sheet plastics in thicknesses ranging from 2.54 to 6.60 mm (0.100 to 0.260 in.). This test method is used to provide data for nonparallel-fiber reinforced materials that cannot be satisfactorily tests by short-beam shear (ASTM D2344).

In-plane shear strength is defined as the shear strength at rupture in which the plane of fracture is located along the longitudinal axis of the specimen between two centrally located notches machined halfway through its thickness on opposing faces. The dimensions between the notches of the specimen are measured. The specimen is placed in the fixture and a specified torque is applied to the bolts. Force is applied at 1.3 mm/min (0.050 in/min) until failure. The specimen is measured again in order to determine Shear Strength.

Shear tests of various kinds are widely used in the reinforced plastics industry to assess the strength of the reinforcement-to-resin bond in polyester, vinyl ester, and epoxy-resin composites.

Please email or call (304) 547-5800 for information regarding test procedures, results, specimen information, pricing or any other ASTM D3846 questions you may have.

Reference: ASTM D3846 – Standard Test Method for In-Plane Shear Strength of Reinforced Plastics