TEMPERATURE-DEPENDENT PROPORTIONAL LIMIT STRESS OF CARBON FIBER-REINFORCED SILICON CARBIDE CERAMIC-MATRIX COMPOSITES
| Autor: | Longbiao Li |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Ceramics-Silikáty, Vol 63, Iss 3, Pp 330-337 (2019) |
| Druh dokumentu: | article |
| ISSN: | 0862-5468 1804-5847 |
| DOI: | 10.13168/cs.2019.0028 |
| Popis: | In this paper, the temperature-dependent proportional limit stress of carbon fiber-reinforced silicon carbide ceramic-matrix composites (C/SiC CMCs) is investigated using the energy balance approach. The temperature-dependent micromechanical parameters of fiber and matrix modulus, fiber/matrix interface shear stress and interface debonded energy, and matrix fracture energy are incorporated into the analysis of the micro stress analysis, fiber/matrix interface debonding criterion and energy balance approach. The relationships between the proportional limit stress, fiber/matrix interface debonding and temperature are established. The effects of fiber volume fraction, fiber/matrix interface shear stress, interface frictional coefficient, interface debonded energy and matrix fracture energy on the proportional limit stress and fiber/matrix interface debonding length versus temperature curves are discussed. The experimental proportional limit stress and fiber/matrix interface debonding length of 2D C/SiC composite at elevated temperatures of 973K and 1273K are predicted. For C/SiC composite, the proportional limit stress of C/SiC composite increases with temperature, due to the increasing of fiber/matrix interface shear stress and decreasing of the thermal residual stress. |
| Databáze: | Directory of Open Access Journals |
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