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含热冲击预损伤的陶瓷基复合材料损伤本构模型

杨正茂 刘晖 杨俊杰

杨正茂, 刘晖, 杨俊杰. 含热冲击预损伤的陶瓷基复合材料损伤本构模型[J]. 力学学报, 2019, 51(6): 1797-1809. doi: 10.6052/0459-1879-19-229
引用本文: 杨正茂, 刘晖, 杨俊杰. 含热冲击预损伤的陶瓷基复合材料损伤本构模型[J]. 力学学报, 2019, 51(6): 1797-1809. doi: 10.6052/0459-1879-19-229
Yang Zhengmao, Liu Hui, Yang Junjie. DAMAGE CONSTITUTIVE MODEL FOR THERMAL SHOCKED-CERAMIC MATRIX COMPOSITE[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(6): 1797-1809. doi: 10.6052/0459-1879-19-229
Citation: Yang Zhengmao, Liu Hui, Yang Junjie. DAMAGE CONSTITUTIVE MODEL FOR THERMAL SHOCKED-CERAMIC MATRIX COMPOSITE[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(6): 1797-1809. doi: 10.6052/0459-1879-19-229

含热冲击预损伤的陶瓷基复合材料损伤本构模型

doi: 10.6052/0459-1879-19-229
基金项目: 1) 中国科学院战略性先导专项(XDA17030100);国家自然科学基金项目资助(11572169);国家自然科学基金项目资助(51775294)
详细信息
    通讯作者:

    杨正茂

  • 中图分类号: TB332

DAMAGE CONSTITUTIVE MODEL FOR THERMAL SHOCKED-CERAMIC MATRIX COMPOSITE

  • 摘要: 陶瓷基复合材料结构在服役过程中不可避免地经受热冲击(较高的热应力梯度)而产生热机械损伤, 因此, 建立含循环热冲击预损伤材料的损伤本构模型, 以描述材料在热机械载荷作用下的力学行为, 对材料结构损伤容限设计与结构完整性评估非常重要. 本文首先对经历了循环热冲击的材料进行单调拉伸损伤实验, 发现对于含循环热冲击预损伤的材料, 其弹性模量的下降与所施加的应变直接相关. 然后在连续介质损伤力学的框架下, 基于平面应力假设, 建立了含循环热冲击预损伤材料的损伤演化模型, 该模型所涉及的参数可通过一个偏轴(45$^\circ$)以及两个正轴(平行于两个主方向)的单调拉伸试验获得. 最后, 采用经典塑性理论对由基体损伤引起的非弹性应变进行了描述. 本文所提出的应变损伤宏观模型可以描述陶瓷基复合材料在热机械载荷作用下的损伤演化, 同时弥补了含预损伤的陶瓷基复合材料在机械载荷下损伤本构模型在理论及实验研究方面的不足.

     

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出版历程
  • 收稿日期:  2019-08-22
  • 刊出日期:  2019-11-18

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