He-Hutchinson模型在连续陶瓷纤维增韧陶瓷基复合材料研究中的应用

Application of the He-Hutchinson Model in the Study of Continuous Ceramic Fiber Toughened Ceramic Matrix Composites

基于裂纹扩展的能量释放率准则,He-Hutchinson(H-H)模型可以预判连续陶瓷纤维增韧陶瓷基复合材料(CMCs)的基体裂纹在界面处的传播路径,对CMCs的增韧设计有着重要的指导价值,但目前尚未见H-H模型在CMCs研究领域的系统性综述文献。本文首先介绍了H-H模型的力学基础以及应用于CMCs中的必要简化过程,得出基于材料组元断裂能和弹性失配系数的裂纹偏转判据。基于目前形成的材料微观力学参数测量方法,结合CMCs脆性、微观结构复杂的特点,系统总结归纳了适用于CMCs的原位弹性模量、材料断裂能以及界面脱粘能的测量方法及优缺点。基于原位微观力学参数,重点综述与讨论了H-H模型在多孔基体CMCs和含界面相CMCs中的应用进展,最后指出了H-H模型目前存在的主要问题,并对其后续发展提出了建议。

The famous He-Hutchinson(H-H)model can predict the propagation of matrix cracks at the interface,which based on the energy release rate criterion of crack propagation,and it has an essential role in toughening design in continuous ceramic fiber reinforced ceramic matrix compo-sites(CMCs).However,there is no literature review on H-H model in the field of CMCs.In this paper,the mechanical basis and simplification content of H-H model in CMCs research are firstly introduced,and the crack deflection criterion is obtained based on fracture energy and elastic mismatch coefficient of material components.Moreover,the measurement methods and characteristics of micro-mechanical parameters(including in-situ elastic modulus,material fracture energy and interface debonding energy)are systematically summarized,which based on the current measurement methods of material micro-mechanical parameters and the CMCs characteristics of brittle and complex microstructure.Also,the application progress of H-H model in porous matrix CMCs and interface phase CMCs is demonstrated,which based on in-situ micromechanical parameters.Finally,the existing problems of H-H model are pointed out and some suggestions for its further development are put forward.