Micromechanics based model of fatigue/oxidation for ceramic matrix composites
Micromechanics based model of fatigue/oxidation for ceramic matrix composites
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DOI：
10.1016/j.compscitech.2004.09.029
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发表时间：
2005-03
影响因子：
9.1
通讯作者：
F. Pailler;J. Lamon
中科院分区：
文献类型：
--
作者：
F. Pailler;J. Lamon
提出了一种基于微观力学的微型复合材料热机械行为模型。它基于 Lissart 等人提出的机械行为模型。 。使用基于断裂统计的模型来描述基体的多重破裂和纤维失效。考虑了热引起的残余应力。介绍了高温氧化引起的相间降解或裂纹愈合的动力学。该模型应用于 Hi-Nicalon 复丝丝束增强的 SiC/SiC 微型复合材料。发现预测与室温下的机械行为非常一致。预计空气中高温下静态疲劳变形的趋势。
A micromechanics based model of the thermomechanical behavior of minicomposites is proposed. It is based on the model of mechanical behavior proposed by Lissart et al. . Multiple cracking of matrix and fiber failures are described using a fracture statistics based model. Thermally induced residual stresses are taken into account. Kinetics of interphase degradation or crack healing induced by oxidation at high temperature were introduced. The model was applied to SiC/SiC minicomposites reinforced by Hi–Nicalon multifilament tows. Predictions were found to be in good agreement with the mechanical behavior at room temperature. Trends in deformations in static fatigue at high temperature in air are anticipated.