Purpose

As a kind of common lightweight porous materials, honeycombs have a wide range of applications in aerospace, architecture, packaging and other fields. In this paper, four types of new gradient honeycombs with negative Poisson's ratio are obtained, including angle gradient, thickness gradient and functional gradient, which are obtained by changing the geometric or physical parameters of cells.

Methods

The dynamic responses of gradient auxetic honeycombs under different impact speeds are studied by ABAQUS display dynamic finite element method, and the deformation profiles of gradient honeycomb models are obtained. The nominal stress–strain curves and energy absorptions of the gradient auxetic honeycombs are studied, and the dynamic bearing capacity of the four kinds of gradient auxetic honeycombs is further analyzed.

Results and Conclusion

The results obtained in this paper show that the thickness of cell walls has a great influence on the impact resistance and vibration energy absorption of honeycomb structures. As for gradient honeycombs, the angle gradient honeycomb is better than the other three types in energy absorption, and the functional gradient honeycomb containing ceramic is less deformed. The research results in this paper will provide theoretical guidance for energy absorption, vibration reduction design and applications of honeycomb structures in the engineering field.

中文翻译：

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梯度辅助蜂窝的动态破碎

目的

作为一种常见的轻质多孔材料，蜂窝在航空航天，建筑，包装和其他领域具有广泛的应用。本文通过改变孔的几何或物理参数，获得了四种具有负泊松比的新型梯度蜂窝，包括角度梯度，厚度梯度和功能梯度。

方法

利用ABAQUS显示动态有限元方法研究了梯度拉力蜂窝在不同冲击速度下的动力响应，得到了梯度蜂窝模型的变形轮廓。研究了梯度拉力蜂窝的名义应力-应变曲线和能量吸收，并进一步分析了四种梯度拉力蜂窝的动态承载能力。

结果与结论

本文的结果表明，孔壁的厚度对蜂窝结构的抗冲击性和振动能量吸收有很大的影响。对于梯度蜂窝，在能量吸收方面，角度梯度蜂窝比其他三种蜂窝更好，并且含有陶瓷的功能梯度蜂窝变形较小。本文的研究结果将为蜂窝结构的能量吸收，减振设计和工程应用提供理论指导。