纺织陶瓷基复合材料结构热-力学行为多尺度模型研究

项目名称： 纺织陶瓷基复合材料结构热-力学行为多尺度模型研究

项目编号： No.11272207

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 张大旭

作者单位： 上海交通大学

项目金额： 86万元

中文摘要： 本项目拟采用多尺度模型与方法，即微观尺度的物理解析法、细观尺度的双组元单胞模型及宏观尺度的双组元整体结构模型，考虑纺织陶瓷基复合材料(CMCs)应变损伤引起的材料非线性，考虑纤维束不规则分布的影响，以一种C/C-SiC平纹复合材料为具体对象，探索①纺织CMCs材料的力学、热传导及热力耦合行为；②应变损伤对纺织CMCs材料热-力学行为的影响；③纺织CMCs开孔件和圆管结构的力学、热传导及热力耦合行为；④纤维束不规则分布对纺织CMCs开孔件和圆管结构热-力学行为的影响。开展常温和高温(1300 C)下狗骨与开孔试件单向拉伸试验，结合已有试验数据，对模型预测结果进行验证。研究工作将为分析纺织CMCs结构提供高效计算方法，对揭示纺织CMCs材料与结构热-力学行，对阐明纤维束不规则分布的影响规律有重要意义，研究结果可为合理设计纺织CMCs结构提供科学依据。

中文关键词： 纺织陶瓷基复合材料；热力学行为；损伤；多尺度；双组元模型

英文摘要： This proposal employs a multi-scale modelling technique, i.e. the physical model at the micro-scale, the Binary Model of a unit cell at the meso-scale, and the Binary Model of an integrated structure at the macro-scale, to investigate the thermal-mechanical behaviour of textile ceramic matrix composites (CMCs). The nonlinear material properties caused by strain-induced damage and the effects of irregular waviness of fibre tows are considered. A carbon fibre/carbon-SiC matrix (C/C-SiC) plain weave composite is chosen to study ① the mechaical, heat transfer, and themal-mechanical coupling behaviour of textile CMCs materials; ② the effects of stain-induced damage on the textile CMCs material's themral-mechaical behaviour; ③ the mechaical, heat transfer, and themal-mechanical coupling behaviour of textile CMCs open-hole coupons and circular tubes; ④ and the effects of irregular tow waviness on the themral-mechanical behaviour of textile CMCs open-hole coupons and circular tubes. Tension tests of dog-bone specimens and open-hole coupons will be carried out under ambient and high temperatures (1300 C). The theoretical prediction is to be validated by the new experimental data and those obtained from a previous test. The work will provide an computational efficient approach to analyse textile CMCs structures. The signi

英文关键词： Textile ceramic matrix composites；Thermal-mechanical behaviour；Damage；Multi-scale；Binary Model