| 层合陶瓷基复合材料多尺度应力-应变计算模型 |
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| 引用本文： | 方光武,宋迎东,高希光.层合陶瓷基复合材料多尺度应力-应变计算模型[J].航空动力学报,2017,32(6):1375-1380. |
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| 作者姓名： | 方光武 宋迎东 高希光 |
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| 作者单位： | 1.南京航空航天大学 能源与动力学院 江苏省航空动力系统重点实验室，南京 210016 |
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| 基金项目： | 国家自然科学基金（51575261, 51675266）； 航空科学基金（2015ZB52016）； 南京航空航天大学校博士学位论文创新与创优基金（BCXJ14-02）； 江苏省高校优势学科建设工程资助项目 |
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| 摘 要： | 对层合陶瓷基复合材料(CMCs)的应力-应变行为进行了研究。基于多尺度分析方法，实现了由组分性能参数到层合陶瓷基复合材料整体应力-应变的计算。采用可实现单向纤维增强陶瓷基复合材料应力-应变计算的细观力学模型，由材料的细观组分性能计算出单向板的非线性弹性性能，并将单向板的弹性性能作为层合复合材料模型的输入参数，通过有限元法计算层合陶瓷基复合材料的整体应力-应变响应。与试验数据的对比表明:采用该模型可以实现层合陶瓷基复合材料在单调拉伸载荷及拉伸加卸载条件下应力-应变曲线的预测，其中数据的最大偏离为19.61%.
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| 关 键 词： | 陶瓷基复合材料(CMCs) 多尺度模型 应力-应变行为 细观力学模型 有限元法(FEM) |
| 收稿时间： | 2015/5/18 0:00:00 |
Multi-scale stress-strain calculation model of laminated ceramic matrix composites |
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| FANG Guangwu,SONG Yingdong,GAO Xiguang.Multi-scale stress-strain calculation model of laminated ceramic matrix composites[J].Journal of Aerospace Power,2017,32(6):1375-1380. |
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| Authors: | FANG Guangwu SONG Yingdong GAO Xiguang |
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| Abstract: | The stress-strain behavior for laminated ceramic matrix composites (CMCs) was studied. A model of calculating the stress-strain behavior for CMCs directly from constituent parameters was presented based on multi-scale method. On the basis of the micromechanical model of unidirectional fiber reinforced CMCs, the nonlinear mechanical response of unidirectional laminate can be calculated from the mechanical parameters of constituents. Subsequently, the stress-strain response of the entire composites can be obtained from the response of unidirectional laminate by finite element methods. The predicted stress-strain curves of laminated CMCs under monotonic tensile and repeated loading were acceptable if compared with the experimental results. Among these curves and their corresponding experimental results, the biggest deviation was 19.61%. |
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| Keywords: | ceramic matrix composites(CMCs) multi-scale model stress-strain behavior micromechanical model finite element method (FEM) |
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