界面层对C/SiC复合材料热残余应力影响的模拟及分析

吕毅; 张伟; 吕鹏

doi:10.13433/j.cnki.1003-8728.2018.0126

界面层对C/SiC复合材料热残余应力影响的模拟及分析

doi: 10.13433/j.cnki.1003-8728.2018.0126

吕毅¹,
张伟²,
吕鹏³

1.
西安航空学院飞行器学院, 西安 710077;
2.
西北工业大学无人机特种技术重点实验室, 西安 710072;
3.
空间电子信息技术研究院, 西安 710100

基金项目:

陕西省自然科学基金项目（2016JQ1043）与西安航空学院校级科研基金项目（2016KY1101）资助

详细信息

作者简介:
吕毅(1981-),副教授,博士,研究方向为复合材料力学行为的表征,lvyi112@aliyun.com

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- 文章访问数: 171
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- 被引次数: 0
出版历程
- 收稿日期: 2017-01-18
- 刊出日期: 2018-06-05

Simulation and Analysis of Influence of Interface on Thermal Residual Stress of C/SiC Composites

1.
School of Aerocraft Engineering, Xi'an Aeronautical University, Xi'an 710077, China;
2.
Laboratory of Science and Technology on UAV, Northwestern Polytechnical University, Xi'an 710072, China;
3.
Academy of Space Electronic Information Technology, Xi'an 710100, China

摘要

摘要: 针对平纹编织C/SiC复合材料的C纤维束，通过对其扫描电子显微镜（Scanning electron microscope，SEM）照片的测量，考虑纤维排布以及选择合适的界面模型，建立了包含界面层的三维三相的代表特征体元（Representative volume element，RVE）的有限元模型。采用间接耦合的降温法，在考虑温度对组分弹性常数的影响以及施加合适的周期性边界条件的基础上模拟了C纤维束轴向的热残余应力。分析可知，对于SiC基体的热残余应力，其随着界面层厚度的减小而增大，随着界面层模量的增大而增大。引入一维应力分布轴，将振荡幅值作为选择最佳参数的一个条件，据此可知选用热膨胀系数小的界面层材料可更好的降低组分间热残余应力变化的梯度。
- 界面层 /
- C/SiC复合材料 /
- C纤维束 /
- 热残余应力 /
- 代表特征体元
Abstract: For carbon fiber bundle of plain weave C/SiC composites, the three dimensional and three phase finite element model of representative volume element (RVE) with interface is established by using the scanning electron microscope (SEM) pictures, and considering fiber arrangement and selection of appropriate interface model. The axial TRS of carbon fiber bundle is simulated by using cooling method with indirect coupling, considering the influence of temperature on the elastic constants of the components and applying appropriate periodic boundary conditions. The analysis shows that the TRS of SiC matrix increases with the decrease of the thickness of interface, and increases with the increase of the interface modulus. Introducing the one-dimensional stress distribution axis and using oscillation amplitude of stress as one condition of choosing the best parameters, it is considered that it's better to reduce the gradient of the change of TRS among the components by choosing interface with small thermal expansion coefficient.
- interface /
- C/SiC composites /
- Carbon fiber bundle /
- thermal residual stress /
- RVE

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参考文献(25)

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