Room temperature tensile and fatigue properties of silicon carbide fiber-reinforced aluminosilicate glass

Conference · Mon Oct 01 04:00:00 EDT 1990 · Ceramic Engineering and Science Proceedings; (USA)

OSTI ID:6411302

Zawada, L P; Butkus, L M; Hartman, G A

Matrix-microcracking has been identified as an indicator of the onset of damage accumulation in ceramic matrix composites. Stress levels required to produce microcracking in unidirectional and cross-ply laminates of Nicalon-reinforced aluminosilicate glass were determined during monotonic tension testing. Specimens were then tested in tension-tension fatigue (R = 0.1) at stress levels ranging up to 250 percent of the matrix microcracking stress level. At high stress levels, the unidirectional specimens exhibited a sharp decrease in elastic modulus during the first 10,000 cycles, after which the modulus remained relatively constant until run-out occurred at a million cycles. Similar results were obtained from tests conducted on the cross-ply specimens. It is shown that for this material the fatigue life-limiting stress can be associated with the inelastic stress-strain behavior of those plies having fibers running parallel with the loading axis. 6 refs.

• OSTI ID: 6411302
• Report Number(s): CONF-900160--
• Conference Information: Journal Name: Ceramic Engineering and Science Proceedings; (USA) Journal Volume: 11
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
AMBIENT TEMPERATURE
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
FATIGUE
FIBERS
GLASS
MATERIALS
MATRIX MATERIALS
MECHANICAL PROPERTIES
OXYGEN COMPOUNDS
SILICATES
SILICON CARBIDES
SILICON COMPOUNDS
TENSILE PROPERTIES