Accession Number:

ADA235926

Title:

Mechanical behavior of Fiber Reinforced SiC/RBSN Ceramic Matrix Composites: Theory and Experiment

Descriptive Note:

Technical memo

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER

Report Date:

1991-01-01

Pagination or Media Count:

30.0

Abstract:

The mechanical behavior of continuous fiber reinforced SiCRBSN composites with various fiber contents is evaluated. Both catastrophic and noncatastrophic failure is observed in specimens tested for tensile strength. Damage and failure mechanisms are identified via in-situ monitoring using nondestructive evaluation techniques throughout the loading history. Effects of fibermatrix interfaces debonding splitting parallel to the fibers are discussed. Statistical failure behavior of fibers is also observed, especially when interfaces are weak. Microstructure models that incorporate residual stresses to calculate the critical matrix cracking strength, ultimate strength and work of pull-out are reviewed and used to predict composite response. For selected test problems, experimental measurements are compared to analytical predictions.

Subject Categories:

  • Laminates and Composite Materials
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE