Fracture Toughness Testing of a Ceramic Matrix Composite.
Abstract
The need for an accurate fracture toughness testing technique for fiber reinforced ceramic composites was identified. A technique was developed to measure small crack mouth displacements over small gauge lengths of small glass-ceramic composite specimens during loading. The technique was applied to Mode II crack propagation. A loading fixture capable of exerting and measuring small loads was developed. A technique to measure compliances in small composite specimens was perfected. The validity of using a laser based interferometric technique to determine the instant of crack initiation was studied. Finally, the Mode II critical strain energy release rate of interlaminar delamination growth was evaluated. Sample results for a 1723 glass matrix, silicon carbide fiber composite are included and recommendations for further study are described.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1987
- Accession Number
- ADA189846
Entities
People
- Robert P. Vozzola
Organizations
- Air Force Institute of Technology