竹木基复合材料的组坯结构调控与无人机壳体适配性研究

Study on the Modulation of Bamboo/Wood Matrix Hybrid Composite Material and its Adaptability to UAV Shell

  • 摘要: 在全球绿色发展战略驱动下,无人机材料领域亦在追求一种低成本、轻量化、安全性高且具有低碳环保优势的新型材料。本研究以竹木薄片材为基础单元,碳纤维、玻璃纤维布为增强单元,研究基础单元种类、组成比例、组坯结构和增强材料分别对竹木基复合材料板密度、强度和冲击韧性等物理力学性能的影响规律,旨在探索一种适用于无人机壳体的新型绿色环保强韧性优良的复合材料。结果表明,竹木基复合材料密度范围为1.0−1.17 g/cm3,抗弯弹性模量达34.45 GPa,静曲强度达380.75 MPa,剪切强度55.87 MPa,拉伸强度264.06 MPa,冲击韧性达40 kJ/m2;竹木基复合材料的物理力学性能均随着竹单元比例下降而增大;平行结构复合材料的力学性能显著高于正交结构;碳纤维和玻璃纤维增强相均能显著提高复合材料的拉伸、弯曲、压缩、剪切强度和冲击韧性;玻璃纤维增强复合材料的冲击性能优于碳纤维复合材料;通过优化组坯方式、竹/木比例及增强层类型可进一步提高竹木基复合材料强重比的协同性,从而实现其在工业级无人机领域应用。

     

    Abstract: Driven by the global green development strategy, the field of drone materials is also pursuing novel materials that offer low cost, light weight, high safety, and low-carbon environmental advantages. an environmentally friendly composite material with high strength and toughness suitable for unmanned aerial vehicle (UAV) shell was developed by Using thin bamboo and wood veneers as base units, reinforced with carbon fiber and glass fiber fabrics. the effects of type, proportion, lay-up structure and reinforcement materials on bamboo/wood composite physical and mechanical properties were focused. Results showed that the density of the bamboo/wood composites ranges from 1.0 to 1.17 g/cm3, with a flexural modulus of 34.45 GPa, modulus of rupture of 380.75 MPa, shear strength of 55.87 MPa, tensile strength of 264.06 MPa, and impact toughness of 40 kJ/m2. Generally, the physical and mechanical properties improved with an decreased proportion of bamboo. The mechanical performance of composites with parallel layup significantly higher than that of cross-laid structures. Both carbon fiber and glass fiber reinforcements significantly enhance the tensile, flexural, compressive, and shear strength as well as the impact toughness of the composite materials. Glass fiber-reinforced composites demonstrated better impact performance than those reinforced with carbon fiber. By optimizing the lay-up method, the bamboo/wood ratio, and the type of reinforcement layer, the synergy of the strength-to-weight ratio of bamboo-wood-based composites can be further enhanced, thereby enabling their application in the field of industrial-grade unmanned aerial vehicles (UAVs).

     

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