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A New End Tab Design for Off-Axis Tension Test of Composite Materials

A new end tab fabricated using a fiberglass knit in a silicon rubber matrix was used for off-axis tension tests on unidirectional composites. It was shown experimentally that this new tab allowed shear deformation of the specimen to occur in the hydraulic grips and, thus, produce a uniform state of strain in the specimen. Consequently, the shear modulus could be determined accurately using this new tab. Furthermore, due to the absence of stress concentrations, this procedure could also be used to determine shear strength.