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Title: Experimental investigation of probabilistic failure of SiC/SiC composite tubes under multiaxial loading

Journal Article · · Composite Structures

This paper presents an experimental investigation of the failure behavior of SiC fiber-reinforced SiC matrix (SiC/SiC) composite tubes under multiaxial loading. A new testing apparatus is designed to independently apply axial stress and internal pressure to SiC/SiC tubes. Acoustic emission (AE) is used to monitor the damage growth in the specimen. Based on the measured stress–strain response, a strain-based criterion is proposed to determine the proportional limit stress (PLS). The proposed strain-based criterion is compared with the PLS determined by the AE measurement. The PLS is determined for different loading ratios to form a multiaxial failure surface. By testing multiple replicates, the statistical variations of the PLS are determined. In conclusion, based on the experimental results, a mathematical model is developed to characterize the probability distribution of the PLS of SiC/SiC composites under multiaxial loading.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE), Nuclear Fuel Cycle and Supply Chain. Advanced Fuel Campaign
Grant/Contract Number:
AC05-00OR22725; NE0008785
OSTI ID:
2324019
Alternate ID(s):
OSTI ID: 2319051
Journal Information:
Composite Structures, Journal Name: Composite Structures Vol. 335; ISSN 0263-8223
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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