期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 120, 期 -, 页码 150-161出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2018.11.006
关键词
Ceramic matrix composite; Thermal shocks; Thermomechanical damage; Damage evolution; Continuum damage modeling
资金
- China Natural Science Foundation [11572169, 51775294]
Thermal shock is a typical loading case for high temperature components in turbines. The ceramic matrix composites become attractive for their high temperature behavior. However, their low heat conductivity makes thermal shock damage a typical damage mechanism for the turbine application. In the present paper, microstructural evolutions of the oxide/oxide ceramic matrix composite under thermal shock are studied experimentally. The mechanical behavior is related to the thermal shock temperature and cycles. The thermo-mechanical damage is characterized by degradation of the macroscopic elastic modulus. A thermal shock damage model is introduced based on the continuum damage mechanics principle, which can describe monotonic as well as cyclic thermal shock damage processes.
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