Tensile Testing on Composites

Stress strain characterization tests on carbon epoxy based composite laminates varies depending on the orientation and stiffnesses of the layered materials. Using TestResources electromechnical test machines equipped with mechanical wedge action grips, researchers have measured composite stress strain properties based on imaging of strain values which are helpful due to displacement continuity common to composites. Stress strain response of composites was measured using two CCD cameras and 3D digital image correlation software at the University of Wisconsin Milwaukee. Mechanical stress strain tests were performed on unidirectional and notched carbon epoxy specimens. Tack tests measure the ability of an adhesive to form an instantaneous bond. Peel tests measure adhesion to the surface. Specimens were also tested in tension per ASTM D5766 for open hole tensile strength of polymer

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