| 界面脱粘对陶瓷基复合材料疲劳迟滞回线的影响 |
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| 引用本文： | 李龙彪,宋迎东,孙志刚.界面脱粘对陶瓷基复合材料疲劳迟滞回线的影响[J].固体力学学报,2009,30(1). |
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| 作者姓名： | 李龙彪 宋迎东 孙志刚 |
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| 作者单位： | 南京航空航天大学能源与动力学院,南京,210016 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，航空科学基金，南京航空航天大学博士学化论文创新与创优基金，江苏省普通高校研究生创新基金，高等学校博士学科点专项科研基金 |
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| 摘 要： | 采用细观力学方法对脆性纤维增强的陶瓷基复合材料拉-拉疲劳载荷下应力-应变迟滞回线进行了研究,将拉梅公式与库仑摩擦法则相结合分析了界面脱粘区以及粘结区复合材料细观应力场.根据卸载与重新加载时纤维相对基体滑移机制,分析了加卸载纤维轴向应力分布,结合断裂力学界面脱粘准则确定了初始加载界面脱粘长度ls、卸载界面反向滑移长度y以及重新加载界面滑移长度z',讨论了界面脱粘能和界面摩擦系数对初始界面脱粘、卸载界面反向滑移、重新加载界面滑移以及加卸载迟滞回线的影响.并与Pryce-Smith模型和试验数据进行对比表明:该文模型与试验曲线吻合的较好.
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| 关 键 词： | 陶瓷基复合材料 疲劳 迟滞回线 界面脱粘 库仑摩擦 |
INFLUENCE OF INTERFACE DE-BONDING ON THE FATIGUE HYSTERESIS LOOPS OF CERAMIC MATRIX COMPOSITES |
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| Longbiao Li,Yingdong Song,Zhigang Sun.INFLUENCE OF INTERFACE DE-BONDING ON THE FATIGUE HYSTERESIS LOOPS OF CERAMIC MATRIX COMPOSITES[J].Acta Mechnica Solida Sinica,2009,30(1). |
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| Authors: | Longbiao Li Yingdong Song Zhigang Sun |
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| Affiliation: | College of Energy and Power Engineering;Nanjing University of Aeronautics and Astronautics;Nanjing;210016 |
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| Abstract: | The stress/strain hysteresis loops under tensile-tensile fatigue loading of brittle fiber reinforced ceramic matrix composites has been studied using a micromechanical approach. A Lame formulation incorporated with Coulomb friction law was adopted to solve the elastic states of fiber/matrix stress transfer through a frictionally constrained interface in the slipping region and the interface bonding region. Based upon the mechanisms of the fiber sliding relative to the matrix during unloading and reloading, ... |
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