X射线衍射法探究碳纤维复合材料界面应力分布

X 射线衍射法探究碳纤维复合材料界面应力分布X 射线衍射法探究碳纤维复合材料界面应力分布摘 要残余应力会使碳纤维复合材料的稳定性降低，而且会提高碳纤维复合材料后续工序难度。因此，研究界面应力分布有利于减小由碳纤维复合材料局部应力过大发生事故的概率，分析碳纤维复合材料应力分布有助于预防其失效。所以研究碳纤维复合材料界面意义十分明显。本文据此提出利用 X 射线衍射法来进行探究。本文理论部分先简明扼要地讲述了 X 射线自发现以来一百多年的发展历程，然后阐述了 X 射线衍射法测定应力的物理原理，其中利用了布拉格方程及广义胡克定律，同时也讲述了实验测定方法。实验部分先对试样进行相关力学参数，然后进行 X 射线衍射实验，最后得出对于结晶度较低的碳纤维复合材料而言，X 射线衍射法的测定效果并不理想的结论，并提出试样结晶度与 X 射线衍射结晶峰二者关系的进一步探究性实验。关键词：碳纤维复合材料；界面应力；X 射线衍射北京理工大学珠海学院 2020 届本科生毕业论文Study on Interface Stress Distribution of Carbon Fiber Composite by X-ray DiffractionAbstractThe residual stress will reduce the stability of the carbon fiber composite and increase the 北京理工大学珠海学院 2020 届本科生毕业论文difficulty of the subsequent process. Therefore, the study of interface stress distribution is conducive to reduce the probability of accidents caused by excessive local stress of carbon fiber composite, and the analysis of stress distribution of carbon fiber composite is helpful to prevent its failure. So it is significant to study the interface of carbon fiber composite. In this paper, X-ray diffraction method is proposed. In the theoretical part of this paper, the development course of X-ray in more than 100 years since its discovery is briefly described, and than the physical principle of measuring stress by X-ray diffraction method is described, in which Bragg equation and generalized Hooke’s law are used, as well as experimental measurement method. In the e...