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Micromechanics of Damage Accumulation in a 2.5D Woven C-Fiber/SiC Ceramic Composite

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Abstract

The morphology of a C/PyC/SiC ceramic composite is studied and its microdamage mechanisms are revealed. Some models based on the micromechanical fracture mechanics are proposed to describe the possible damage processes. The influence of the observed microdamage on the stiffness reduction is studied. It is shown that the delamination between the layers and the cracks in the coating alone cannot explain the stiffness reduction observed in tests. Debonding between the SiC coating and pyrocarbon is suggested as another mechanism of the stiffness reduction.

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Authors and Affiliations

  1. Div. of Polymer Engineering, Luleå, University of Technology, S-97187, Luleå, Sweden

    N. Jekabsons & J. Varna

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  1. N. Jekabsons
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  2. J. Varna
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Jekabsons, N., Varna, J. Micromechanics of Damage Accumulation in a 2.5D Woven C-Fiber/SiC Ceramic Composite. Mechanics of Composite Materials 37, 289–298 (2001). https://doi.org/10.1023/A:1012336618540

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  • DOI: https://doi.org/10.1023/A:1012336618540

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