Abstract The unusual properties of mechanical metamaterials are determined by the configuration of artificial periodic structures. However, the mechanical performance of conventional metamaterials is irreversible and cannot perceive and respond to the changes in the environment. In present study, a zero Poisson's ratio metamaterial with intelligent switching mechanical properties and vibration isolation effect is proposed. Based on a 4D printing method of shape memory polymer, this metamaterial is created that can sense temperature changes and switch mechanical properties. The macroscopic deformation and the morphology change of the metamaterial during compression tests are analyzed using experimental and finite element methods. The irregular buckling distortion of the metamaterial is eliminated by cylindrical design, and controllable and adjustable local deformation and stress-strain curve are achieved based on microstructure gradient design. Subsequently, this work focused on the vibration isolation performance of metamaterials, and found fascinating shock absorption performance. Compared with traditional linear spring, this metamaterial spring can effectively reduce the vibration amplitude of certain frequency bands before reaching the resonance peak, which provides a new realization method for low-frequency vibration isolation design.

中文翻译：

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具有机械和隔振性能切换功能的4D打印零泊松比超材料

摘要 机械超材料的异常性质是由人工周期结构的配置决定的。然而，传统超材料的机械性能是不可逆的，无法感知和响应环境的变化。在目前的研究中，提出了一种具有智能切换机械性能和隔振效果的零泊松比超材料。基于形状记忆聚合物的 4D 打印方法，这种超材料可以感知温度变化并切换机械性能。使用实验和有限元方法分析了压缩测试过程中超材料的宏观变形和形态变化。圆柱形设计消除了超材料的不规则屈曲变形，基于微结构梯度设计，实现局部变形和应力应变曲线可控可调。随后，这项工作重点研究了超材料的隔振性能，并发现了令人着迷的减震性能。与传统的线性弹簧相比，这种超材料弹簧可以在达到共振峰值之前有效降低某些频段的振动幅度，为低频隔振设计提供了一种新的实现方法。