Matrix cracking in unidirectional ceramic matrix composites under quasi-static and cyclic loading

Journal Article · Thu Apr 01 00:00:00 EST 1993 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(93)90178-U· OSTI ID:6265100

Pryce, A W; Smith, P A ^[1]

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1. Univ. of Surrey (United Kingdom). Dept. of Materials Science and Engineering

Experimental data associated with the development of matrix cracks in unidirectional continuous silicon carbide fiber/calcium alumino-silicate matrix laminates under quasi-static loading are presented, including crack density, residual strain and hysteresis behavior as functions of applied stress. Simple models are developed, based on an assumption of purely frictional load transfer between the fiber and matrix, which describe reasonably well the quasi-static stress-strain behavior in the presence of cracks. Under tension-tension mechanical fatigue cycling it is found that the crack density stabilizes at a relatively early stage in the test. Based on the quasi-static model, the changes in fatigue hysteresis loops on fatigue cycling are interpreted in terms of a reduction in the effective frictional interfacial shear stress.

• OSTI ID: 6265100
• Journal Information: Acta Metallurgica et Materialia; (United States), Vol. 41:4; ISSN 0956-7151
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM SILICATES
CRACKS
CALCIUM ALLOYS
COMPOSITE MATERIALS
SILICON CARBIDES
FATIGUE
MATHEMATICAL MODELS
MATRIX MATERIALS
STRESSES
ALLOYS
ALUMINIUM COMPOUNDS
CARBIDES
CARBON COMPOUNDS
MATERIALS
MECHANICAL PROPERTIES
OXYGEN COMPOUNDS
SILICATES
SILICON COMPOUNDS
360603* - Materials- Properties