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为提升蜂窝材料的抗缺陷能力,在正六边形、Kagome和正三角形蜂窝材料的孔壁表面附着软材料层,制备了多层级蜂窝材料。然后针对孔壁弯曲缺陷类型,使用解析方法研究了蜂窝材料面内模量的缺陷敏感性和力学性能,并用数值模拟对理论值进行了验证。结果表明:通过选择合适的附着软材料层与几何参数,可使得多层级蜂窝材料比传统蜂窝材料对缺陷有更高的抵抗能力,表现出较低的缺陷敏感性。另外,在保持相对密度不变的前提下,多层级蜂窝材料的力学性能与传统蜂窝材料的相比也有较大提高。研究结论为设计制造具有抗缺陷能力的新型蜂窝材料提供了理论基础。
In order to enhance the defect resistance of honeycomb materials, a multi-layered honeycomb material was prepared by attaching soft material layers to the surface of the cell walls of regular hexagonal, Kagome and regular triangular honeycomb materials. Then, according to the type of hole wall bending defects, the sensitivity and mechanical properties of the in-plane modulus of honeycomb materials were studied by analytical method. The theoretical values were verified by numerical simulation. The results show that the multi-level honeycomb material can resist the defects of the honeycomb by traditional honeycomb materials, and show lower sensitivity to defects by selecting suitable soft material layers and geometrical parameters. In addition, to maintain the relative density of the same premise, the mechanical properties of multi-level honeycomb materials compared with the traditional honeycomb material also has greatly improved. The conclusion of the study provides a theoretical basis for the design and manufacture of new honeycomb materials with defect-resistant ability.