This test method determines the in-plane shear response of polymer matrix composite materials reinforced by high-modulus fibers. The composite material form is limited to a continuous-fiber-reinforced composite ±45° laminate capable of being tension tested in the laminate x direction.This test method is designed to produce in-plane shear property data for material specifications, research and development,quality assurance, and structural design and analysis.

Properties that may be derived from this test method include the following:

In-plane shear stress versus shear strain response

In-plane shear chord modulus of elasticity

Maximum in-plane shear stress for a ±45° laminate

Maximum in-plane shear strain for a ± 45° laminate