生物质材料点阵夹芯胞元力学性能分析

Mechanical Properties of Biomaterial Lattice Sandwich Cell Structure

研究生物质点阵夹芯胞元结构的力学性能,可以减少木建筑重量和降低木材使用量,对适应现代木结构建筑具有重要的现实意义。本研究通过对胞元结构进行力学建模,分析了芯子直径和长度对胞元承载能力的影响,并应用ANSYS有限元软件,仿真分析芯子直径和面板厚度2个因素对胞元受力的影响,依据胞元承载能力和变形程度,进行胞元结构的优选。最后依据优选的胞元结构,设计和制作不同类型的试件进行平压测试。结果表明,胞元平压状态下芯子是受力主体,芯子直径越大,胞元的平压能力越强,但平压性能并不是最优;面板材料对胞元承载力和吸能性有显著影响,生物质复合材料胞元的比强度高于自然纤维材料的比强度。该研究结果为木质复合材料在大跨度坡面屋等木结构建筑工程中的应用奠定了理论和实验基础,具有良好的应用价值。

Studying the mechanical properties of biomaterial lattice sandwich cell structure can reduce the weight of wood building and the use of wood,and it has important practical significance to adapt to modern wood structure building.In this study,the mechanical model of the cellular structure was established to analyze the influence of the core diameter and length on the cellular load-bearing capacity,the finite element software ANSYS was used to simulate and analyze the influence of the core diameter and the panel thickness on the cellular load-bearing capacity,and the optimization of the cellular structure was carried out according to the cellular load-bearing capacity and deformation degree.According to the optimized cellular structure,different types of specimens were designed and manufactured for plain pressure test.The results showed that the larger the core diameter,the stronger the flat compression capacity of the cellular structure,but the flat compression performance was not optimal;The panel material has a significant impact on the bearing capacity and energy absorption of the cellular structure.The specific strength of cellular structure of biomass composites is higher than that of natural fiber materials.The research results lay a theoretical and experimental foundation for the application of wood composite materials in long-span sloping roof and other wood structure construction projects.