CRAG (Composite Research Advisory Group) Test Methods for the Measurement of the Engineering Properties of Fibre Reinforced Plastics

摘要

The test methods recommended in these data sheets apply to resin matrix composites reinforced with orientated continuous fibers. They are valid for all grades of carbon, glass and aramid fibers, in both U/D tape and woven fabric forms including mixed fiber hybrid combinations, provided that the modes of failure are representative. Epoxy resin matrix systems were used in the development of these methods, but, although confirmatory test evidence is lacking, other resin systems should be equally suitable provided that the composite properties fall within any prescribed test limitations and that valid failure modes are obtained. All multidirectional laminates, including woven fabric laminates, must have their ply orientations and stacking sequence balanced about the mid-plane and the longitudinal axis to ensure axial loading and to prevent rotational, flexural, or off-axis displacements. Great Britain. (jes)