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High-Cycle Fatigue Behavior of SiC-based Ceramic Matrix Composites (CMCs) at High TemperaturesHigh-cycle fatigue (HCF) behavior of a melt-infiltrated, pre-preg SiC/SiC ceramic matrix composite (CMC) was investigated using dogbone tensile specimens without and with simulated cooling holes at 1500 and 2400 °F. The CMC material used for this study was fabricated by GE Aviation and had a ply configuration of [0/90/0]3. HCF tests were conducted with an R-ratio of 0.6 and a cyclic frequency of 30 Hz. Runout in HCF was defined as 30 million cycles. Monotonic tensile tests were conducted at room temperature (RT) on as-received CMC specimens and on runout HCF specimens to determine residual tensile strengths. Digital image correlation (DIC) and acoustic emission (AE) techniques were used to monitor the initiation and progression of damage in RT tensile tests on specimens with and without holes. Microscopy was performed on the polished edge of specimens without cooling holes and on the polished face of specimens with cooling holes that were tested in HCF and achieved runout. Comparisons were made with baseline specimens. Fractography was performed to examine the fracture surfaces of samples that failed under different loading conditions.
Document ID
Acquisition Source
Glenn Research Center
Document Type
Amjad S Almansour
(Glenn Research Center Cleveland, Ohio, United States)
Sreeramesh Kalluri
(HX5, LLC)
Craig E Smith
(Glenn Research Center Cleveland, Ohio, United States)
James D Kiser
(Glenn Research Center Cleveland, Ohio, United States)
Date Acquired
August 23, 2023
Subject Category
Aeronautics (General)
Composite Materials
Meeting Information
Meeting: 11th International Conference on High Temperature Ceramic Matrix Composites (HT-CMC 11)
Location: Jeju
Country: KR
Start Date: August 27, 2023
End Date: August 31, 2023
Sponsors: The Korean Ceramic Society
Funding Number(s)
WBS: 698154.
Distribution Limits
Public Use Permitted.
Technical Review
Single Expert
Ceramic Matrix Composites
High Cycle Thermomechanical Fatigue
Acoustic Emission
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