点击次数：
所属单位：能源与动力学院
发表刊物：Tuijin Jishu
摘要：In order to study high temperature fatigue characteristic of unidirectional carbon/carbon composites, the residual stiffness model and residual strength model of carbon/carbon composites considering temperature and oxidation rate were proposed from fatigue damage mechanics. Tensile/tensile fatigue experiment and residual strength experiment of [0]16 unidirectional carbon/carbon composite laminates specimens with and without anti-oxidation coating also were carried out at room temperature and 700℃. The experiment results show that residual stiffness curves of unidirectional carbon/carbon composites have three stages and present lying "S". The stiffness of unidirectional carbon/carbon composites with anti-oxidation coating decline sharply in initial stage and last stage of fatigue at room temperature and 700℃, but the stiffness have no obvious degradation in middle stage of fatigue. The stiffness degradation of unidirectional carbon/carbon composites is less than 10% at room temperature. However, the stiffness degradation of unidirectional carbon/carbon composites with anti-oxidation coating become more than 30% at 700℃. The unidirectional carbon/carbon composites without anti-oxidation coating exist stiffness degradation obviously, and there is no stiffness sudden drop when material access fatigue life. The fitting results of the model show that the high temperature residual stiffness model and residual strength model of composites can predict well on residual stiffness and residual strength changes of unidirectional carbon/carbon composites at room temperature and 700℃. © 2019, Editorial Department of Journal of Propulsion Technology. All right reserved.
ISSN号：1001-4055
是否译文：否
发表时间：2019-02-01
合写作者：Chen, Bo,温卫东,崔海涛,张宏建,徐颖
通讯作者：Chen, Bo,陈柏