Abstract

A multimaterial strategy is adopted in combination with the structure innovation to achieve enhanced structural stiffness, and meanwhile, to retain the auxetic behavior for auxetic metamaterials. A bimaterial reentrant structure with additional soft arch-like beams and hinges is proposed, and then investigated using both experimental and simulation approaches. The results indicate that the buckling issue of the beam/wall can be significantly reduced if the strength of the hinge is kept small, and the reduction of auxetic behavior due to increased stiffness can also be minimized. Therefore, the strategy to enhance the design flexibility for auxetic metamaterials is verified.

摘要

采用多材料策略与结构创新相结合，以提高结构刚度，同时保持拉胀超材料的拉胀行为。提出了一种带有附加的软拱状梁和铰链的双材料重入结构，然后使用实验和模拟方法进行了研究。结果表明，如果铰链的强度保持较小，则梁/墙的屈曲问题可以显着减少，并且由于刚度增加而导致的拉胀行为的减少也可以最小化。因此，验证了增强拉胀超材料设计灵活性的策略。