ASTM D4255 / D4255M-15aStandard Test Method for In-Plane Shear Properties of Polymer Matrix Composite Materials by the Rail Shear Method
ASTM D4255 is a test method for testing the in-plane shear properties of high-modulus fiber-reinforced composite materials. The method is divided into two procedures. Procedure A tests laminates clamped between two pairs of loading rails. When loaded in tension the rails introduce shear forces in the specimen. In Procedure B, laminates clamped on opposite edges with a tensile or compressive force applied to a third pair of rails in the center are tested.
Before conducting ASTM D4255, it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.