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Stress-dependent matrix crack opening in SiC/SiC composites: theory and analytical prediction

Stress-dependent matrix crack opening in SiC/SiC composites: theory and analytical prediction In the present work, stress-dependent matrix crack opening behavior of SiC/SiC composites was analyzed considering stochastic fragmentation in fibers. The stochastic matrix multiple fragmentation model was adopted to determine the fragmentation lengths of three different types, the accompanying interface debonding process was assessed by the fracture mechanics theory, and stochastic fiber fragmentation was determined by the global load sharing (GLS) criterion. Considering the aforementioned multiple micro-damage mechanisms, matrix crack opening displacements (CODs) in different matrix fragmentation states were determined using a micromechanical technique. Relationships between CODs and the constituent properties of SiC/SiC composites with fiber fragmentation were established. The crack opening behavior of SiC/SiC composites was also analytically predicted. Effects of fiber stochastic fragmentation on crack opening-related damage parameters were examined. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Composite Interfaces Taylor & Francis

Stress-dependent matrix crack opening in SiC/SiC composites: theory and analytical prediction

Composite Interfaces , Volume 30 (6): 23 – Jun 3, 2023
23 pages

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References (73)

Publisher
Taylor & Francis
Copyright
© 2023 Informa UK Limited, trading as Taylor & Francis Group
ISSN
1568-5543
eISSN
0927-6440
DOI
10.1080/09276440.2022.2164127
Publisher site
See Article on Publisher Site

Abstract

In the present work, stress-dependent matrix crack opening behavior of SiC/SiC composites was analyzed considering stochastic fragmentation in fibers. The stochastic matrix multiple fragmentation model was adopted to determine the fragmentation lengths of three different types, the accompanying interface debonding process was assessed by the fracture mechanics theory, and stochastic fiber fragmentation was determined by the global load sharing (GLS) criterion. Considering the aforementioned multiple micro-damage mechanisms, matrix crack opening displacements (CODs) in different matrix fragmentation states were determined using a micromechanical technique. Relationships between CODs and the constituent properties of SiC/SiC composites with fiber fragmentation were established. The crack opening behavior of SiC/SiC composites was also analytically predicted. Effects of fiber stochastic fragmentation on crack opening-related damage parameters were examined.

Journal

Composite InterfacesTaylor & Francis

Published: Jun 3, 2023

Keywords: SiC/SiC composite; crack opening displacement; fiber fragmentation; interface debonding

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