Strain fields and damage around notches in ceramic-matrix composites

Journal Article · Mon Jan 01 00:00:00 EST 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb07881.x· OSTI ID:203539

Mackin, T J ^[1]; Perry, K E; Epstein, J S ^[2]; Cady, C; Evans, A G ^[3]

---

1. Univ. of Illinois, Urbana, IL (United States). Dept. of Mechanical and Industrial Engineering
2. EG and G Idaho, Inc., Idaho Falls, ID (United States). Idaho National Engineering Lab.
3. Univ. of California, Santa Barbara, CA (United States). Materials Dept.

Strain development in several notched ceramic-matrix composites (CMCs) has been monitored over a broad range of load. This was achieved by using phase-shifting moire interferometry, which provides a map of the surface strains. A sequence of fringe patterns was used to chart the evolution of strain redistribution as a function of load. The ensuing strains were related to the micromechanical damage mechanisms. Stress concentrations were estimated from the strain by using stress/strain curves. Implications for the notch sensitivity of CMCs are discussed.

• Sponsoring Organization: USDOE
• OSTI ID: 203539
• Journal Information: Journal of the American Ceramic Society, Vol. 79, Issue 1; Other Information: PBD: Jan 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
STRAINS
DAMAGE
SILICON CARBIDES
CALCIUM SILICATES
ALUMINIUM SILICATES
CARBON
SAMPLE PREPARATION
INTERFEROMETRY
STATIC LOADS
STRESSES
NOTCHES