Damage Mechanisms and Failure of 3-D Carbon-Carbon Composites.
Interim rept. Aug 77-Aug 78,
SOUTHWEST RESEARCH INST SAN ANTONIO TEX
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Mechanical property characterization tests were conducted on specimens from a three-dimensional, cartesian orthogonally woven carbon-carbon C-C material. Tests consisted of tensile and rail shear, which were conducted at room temperature, and compression tests conducted at room temperature up to 2165 C 3930 F. Stress-strain characteristics and acoustic emission instrumentation were employed to infer the mechanics of the fracture initiation process. In addition, a specially developed axial loading stage integral to SwRIs ETEC scanning electron microscope facility was used to view and videotape the crack initiation and development processes. As a result of these studies, a tentative model is described to explain the mechanics of failure in 3-D C-C composites. Author
- Laminates and Composite Materials