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界面在纤维增强复合材料中具有非常重要的作用,只有几十纳米到几十个微米的界面区域是复合材料的薄弱区域,严重影响复合材料的力学性能。通过微尺度实验力学研究微观结构与界面微观力学、宏观断裂性能之间的关系,有助于从微观角度解释复合材料界面应力传递和界面脱粘失效机理,从而为实际的纤维补强提供理论指导。显微共聚焦拉曼光谱是首选的界面微观力学研究方法。本文详细介绍了拉曼光谱在纤维搭桥技术中的应用,并重点从搭桥过程中纤维的架桥力、架桥纤维的止裂作用和界面应力传递三个方面综述了裂缝/架桥纤维的交互微力学。
The interface plays a very important role in the fiber-reinforced composite material. Only the interface area of tens of nanometers to tens of micrometers is the weak area of the composite material, which seriously affects the mechanical properties of the composite material. It is helpful to explain the mechanism of stress transfer and interfacial debonding failure at the microscopic point of view through micro-scale experimental mechanics to study the relationship between microstructure and interfacial micro-mechanics and macro-rupture performance, so as to provide theoretical guidance for practical fiber reinforcement . Microscopy confocal Raman spectroscopy is the preferred interface micromechanics method. In this paper, the application of Raman spectroscopy in fiber-bridging technology is introduced in detail, and the interaction of fiber / bridging fiber is summarized from three aspects: the bridging force of fiber, the crack-arresting effect of bridging fiber and the interface stress transmission during the bridging process Micro-mechanics.