Towards the development of micromechanics equations for ceramic-matrix composites via fiber substructuring
A generic unit cell model which includes a unique fiber substructuring concept is proposed for the development of micromechanics equations for continuous fiber reinforcement ceramic composites. The unit cell consists of three constituents: fiber, matrix, and an interphase. In the present approach, the unit cell is further subdivided into several slices and the equations of micromechanics are derived for each slice. These are subsequently integrated to obtain ply level properties. A stand alone computer code containing the micromechanics model as a module is currently being developed specifically for the analysis of ceramic matrix composites. Towards this development, equivalent ply property results for a SiC/Ti-15-3 composite with 0.5 fiber volume ratio are presented and compared with those obtained from customary micromechanics models to illustrate the concept. Also, comparisons with limited experimental data for the ceramic matrix composite, SiC/RBSN (Reaction Bonded Silicon Nitride) with a 0.3 fiber volume ratio are given to validate the concepts.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
- OSTI ID:
- 5651360
- Report Number(s):
- N-92-19595; NASA-TM--105246; E--6574; NAS--1.15:105246
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360603* -- Materials-- Properties
ALLOYS
CARBIDES
CARBON COMPOUNDS
CERAMICS
COMPARATIVE EVALUATIONS
COMPOSITE MATERIALS
COMPUTER CODES
EVALUATION
FIBERS
FRACTURE MECHANICS
MATERIALS
MATHEMATICAL MODELS
MATRIX MATERIALS
MECHANICAL PROPERTIES
MECHANICS
NITRIDES
NITROGEN COMPOUNDS
ORIENTATION
PHYSICAL PROPERTIES
PLASTICITY
PNICTIDES
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
STRESS ANALYSIS
TEMPERATURE EFFECTS
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
TITANIUM ALLOYS
TITANIUM BASE ALLOYS