Modeling of stress/strain behavior of fiber-reinforced ceramic matrix composites including stress redistribution
A computational simulation procedure is presented for nonlinear analyses which incorporates microstress redistribution due to progressive fracture in ceramic matrix composites. This procedure facilitates an accurate simulation of the stress-strain behavior of ceramic matrix composites up to failure. The nonlinearity in the material behavior is accounted for at the constituent (fiber/matrix/interphase) level. This computational procedure is a part of recent upgrades to CEMCAN (Ceramic Matrix Composite Analyzer) computer code. The fiber substructuring technique in CEMCAN is used to monitor the damage initiation and progression as the load increases. The room-temperature tensile stress-strain curves for SiC fiber reinforced reaction-bonded silicon nitride (RBSN) matrix unidirectional and angle-ply laminates are simulated and compared with experimentally observed stress-strain behavior. Comparison between the predicted stress/strain behavior and experimental stress/strain curves is good. Collectively the results demonstrate that CEMCAN computer code provides the user with an effective computational tool to simulate the behavior of ceramic matrix composites.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
- OSTI ID:
- 6493846
- Report Number(s):
- N-95-17659; NASA-TM--106789; E--9249; NAS--1.15:106789; CNN: RTOP 505-63-12
- Country of Publication:
- United States
- Language:
- English
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Laminate behavior for SiC fiber-reinforced reaction-bonded silicon nitride matrix composites
Laminate behavior for SiC fiber-reinforced reaction-bonded silicon nitride matrix composites
Related Subjects
360603* -- Materials-- Properties
C CODES
CARBIDES
CARBON COMPOUNDS
COMPUTER CODES
COMPUTERIZED SIMULATION
CRACK PROPAGATION
FATIGUE
FRACTURE MECHANICS
MATERIALS
MECHANICAL PROPERTIES
MECHANICS
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
REINFORCED MATERIALS
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
SIMULATION
STRAINS
STRESSES