ASTM D5450 Test Fixture | GD5450-1452

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ASTM D5450 Test Fixture | GD5450-1452


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GD5450-1452 test fixture meets ASTM D5450 requirements. ASTM D5450 determines the transverse tensile properties of wound polymer matrix composites reinforced by high-modulus continuous fibers. Tests of hoop wound (90°) cylinders in axial tension determine transverse tensile properties.A thin walled hoop wound cylinder 100 mm (4 in.) in diameter with a length of 140 mm (5.5 in) is bonded into two end fixtures. The specimen/fixture assembly is then mounted in the testing machine and loaded in tension while recording force. The transverse tensile strength can be determined from the maximum force prior to failure. If the cylinder strain is monitored with strain gages, then the stress-strain response of the material can be determined. From the stress-strain response the transverse tensile strain at failure, transverse tensile modulus of elasticity, and Poisson’s ratio can be derived.

GD5450-1452 Tension fixtures consist of a steel outer shell, insert, load rod, and spherical washer. The outer shell is circular with a concentric circular hollow in one face, a groove along the diameter of the other face, and a center hole through the thickness. Along the diameter perpendicular to the groove, three pairs of small eccentric holes are placed at three radial distances. The two outer pairs of holes are threaded. Four additional threaded holes are placed at the same radial distance as the innermost pair of holes, at ninety degree intervals starting forty-five degrees from the diameter that passes through the center grove.

The fixture insert is circular with a center hole through the thickness. Two sets of holes are placed along a concentric centerline. These holes align with the innermost set of holes in the outer shell. The set of four holes at ninety degree intervals are counterbored. The insert is fastened inside the hollow of the outer shell to form the concentric grove used to put the specimen in the fixture.