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受自然骨缝连接结构的启发,基于图形分形原理,建立了不同阶次的复合材料仿生齿接结构模型。借助商用有限元软件ABAQUS,研究了齿接结构的界面损伤扩展规律与结构承载机制,分析了高阶齿接结构的结构互锁特性、齿数与齿型等因素对结构承载能力的影响。结果表明:高阶齿接结构的结构互锁特性极大地提高了结构承载能力并改变了结构损伤机制,适当增加单位宽度上的接齿数量与改变接齿局部特性可以降低应力集中,改善齿接结构力学性能。研究成果解释了自然骨缝连接结构在进化过程中所体现的力学原理,也为新型工程连接结构的发展开拓了新视野。
Inspired by the natural joint structure, a model of biomimetic toothed structure of composite materials was established based on the principle of fractal. The commercial finite element software ABAQUS was used to study the interface damage propagation mechanism and structure bearing mechanism of the tooth structure. The structural interlocking characteristics, the number of teeth and the tooth shape of the high-order tooth structure were analyzed. The results show that the structural interlocking characteristics of the high-order tooth-jointed structure greatly improve the bearing capacity of the structure and change the damage mechanism of the structure. Appropriately increasing the number of connecting teeth per unit width and changing the local characteristics of the connecting teeth can reduce the stress concentration, Structural mechanics performance. The research results explain the mechanical principle embodied in the evolutionary process of the natural joint structure and open up a new horizon for the development of the new engineering connection structure.