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ASTM D7264

Standard Test Method for Flexural Properties of Polymer Matrix Composite Materials

This test is designed for testing of flexural properties of polymer matrix composites by using a coupon of a rectangular cross section supported by two parallel beams set to a specific support span and deflected at a constant rate from the center of the span.

This test contains two procedures.  Procedure A involves a three point loading system, while procedure B utilizes a four point loading system.  Each procedure requires different calculations for strain due to the different deflections per each system.

Flexural strength, maximum flexural stress, maximum strain, modulus of elasticity, failure mode, location of failure.

Equipment Used:
Test frame, four point flexural fixture, three point flexural fixture.