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
Applicable Testing Standards
Recommended Test Machine
Force range of 5 kN to 600 kN (1,125 lbf to 135,000 lbf)
Adjustable test space
The most popular choice for static tension and compression tests
These dual column testers are available in both tabletop and floor standing models
Recommended Testing Accessories
Load ratings from 25 kN to 500 kN (5,625 lbf to 112,500 lbf)
Jaws move laterally in stationary position while grip body moves on adjustment
Works well with round or flat specimens
Measures displacement for axial tensile, compression, and cyclic testing
Gage lengths from 10 mm to 50 mm (0.5 in to 2.0 in)
Measuring ranges from 5% to 100% strain
Lightweight and self-supporting