Design of high temperature ceramic components against fast fracture and time-dependent failure using cares/life
- Univ. of Wisconsin, Platteville, WI (United States)
- Cleveland State Univ., Cleveland, OH (United States)
- NASA-Lewis Research Center, Cleveland, OH (United States); and others
A probabilistic design methodology which predicts the fast fracture and time-dependent failure behavior of thermomechanically loaded ceramic components is discussed using the CARES/LIFE integrated design computer program. Slow crack growth (SCG) is assumed to be the mechanism responsible for delayed failure behavior. Inert strength and dynamic fatigue data obtained from testing coupon specimens (O-ring and C-ring specimens) are initially used to calculate the fast fracture and SCG material parameters as a function of temperature using the parameter estimation techniques available with the CARES/LIFE code. Finite element analysis (FEA) is used to compute the stress distributions for the tube as a function of applied pressure. Knowing the stress and temperature distributions and the fast fracture and SCG material parameters, the life time for a given tube can be computed. A stress-failure probability-time to failure (SPT) diagram is subsequently constructed for these tubes. Such a diagram can be used by design engineers to estimate the time to failure at a given failure probability level for a component subjected to a given thermomechanical load.
- OSTI ID:
- 83226
- Report Number(s):
- CONF-940416-; TRN: 95:005004-0007
- Resource Relation:
- Conference: 96. annual meeting of the American Ceramic Society (ACS), Indianapolis, IN (United States), 25-28 Apr 1994; Other Information: PBD: 1995; Related Information: Is Part Of Ceramic transactions: Design for manufacturability of ceramic components. Volume 50; Ghosh, A.; Hiremath, B.; Halloran, J. [eds.]; PB: 279 p.
- Country of Publication:
- United States
- Language:
- English
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