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Tensile Creep Behavior of SiC(f)/SiC Ceramic Matrix MinicompositesSingle fiber-tow minicomposites represent the major load-bearing element of woven and laminate ceramic matrix composites (CMCs). To understand the effects of fiber type, fiber content, and matrix cracking on tensile creep in SiCf/SiC CMCs, single-tow SiCf/SiC minicomposites with different fiber types and contents were investigated. The minicomposites studied contained either Hi-Nicalon™ or Hi-Nicalon™ Type S SiC fibers with a boron nitride (BN) interphase and a chemical-vapor-infiltrated-silicon-carbide (CVI-SiC) matrix. Tensile creep was performed at 1200 °C in air. A bottom-up creep modeling approach was applied where creep parameters of the fibers and matrix were obtained separately at 1200 °C. Next, a theoretical model based on the rule of mixtures was derived to model the fiber and matrix creep-time-dependent stress redistribution. Fiber and matrix creep parameters, load transfer model results, and numerical modeling were used to construct a creep strain model to predict creep damage evolution of minicomposites with different fiber types and contents.
Document ID
20205003525
Acquisition Source
Glenn Research Center
Document Type
Accepted Manuscript (Version with final changes)
Authors
Amjad S Almansour
(Glenn Research Center Cleveland, Ohio, United States)
Gregory Morscher
(University of Akron)
Date Acquired
June 15, 2020
Publication Date
July 6, 2020
Publication Information
Publication: Journal of the European Ceramic Society
Publisher: Elsevier
Volume: 40
Issue: 15
Issue Publication Date: December 1, 2020
ISSN: 0955-2219
Subject Category
Composite Materials
Report/Patent Number
E-19837
Funding Number(s)
WBS: 109492.02.03.05.02.01
CONTRACT_GRANT: N00014-11-10765
CONTRACT_GRANT: N00014-14-1-0433
Distribution Limits
Public
Copyright
Use by or on behalf of the US Gov. Permitted.
Technical Review
Single Expert
Keywords
SiC/SiC Minicomposites Creep
Creep Load Sharing Model
Total Creep Strain Model
Oxidation
Fiber Creep
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