The fracture properties of PMR-15/graphite-fiber-fabric composites have been investigated in this study. Processing parameters such as pressure application time and pressure magnitude have been varied systematically to simulate processing defects. Upon testing these composite specimens, insight is gained into the processing/property relations. The fracture specimens are of the single-edge-notched simple beam type, loaded in Mode I or opening mode, with the notch transverse to the plane of the laminate, resulting in translaminar crack propagation. Crack growth initiation is detected by monitoring acoustic emission, which may be qualitatively related to crack extension. The study leads to a better understanding of (a) the failure process or nature of failure of these composites, (b) the correlation between fracture properties and structural variables (void content, etc.) and (c) the correlation between fracture properties and process variables.
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- acoustic emission
- fiber pull-out
- translaminar crack