Abstract

In this work, the mechanical response of an one-dimensional active solid—defined as a network of active stochastic particles interacting by nonlinear hard springs— subject to an external deformation force, is numerically studied and rationalized with a minimal model. It is found that an active solid made of linear springs and subject to an external stress presents an average deformation which is independent of the system’s activity. However, when the active solid is made of nonlinear hard springs, the solid’s average deformation decreases with respect to a passive system under the same conditions, and as a function of activity and rotational noise in the system. The latter result may shed light on new ways to creating an active metamaterial, which could tune its stiffness by moving either its activity or rotational noise.

Graphical abstract

中文翻译：

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活性固体的最小模型偏离平衡力学

摘要

在这项工作中，一维活性固体（定义为由非线性硬弹簧相互作用的活性随机粒子网络）的机械响应受到外部变形力的影响，用最小模型进行了数值研究和合理化。研究发现，由线性弹簧制成并受到外部应力的活性固体呈现出与系统活动无关的平均变形。然而，当主动实体由非线性硬弹簧制成时，在相同条件下，实体的平均变形相对于被动系统会减小，并且是系统中活动和旋转噪声的函数。后一个结果可能会揭示创建活性超材料的新方法，该材料可以通过移动其活动或旋转噪声来调整其刚度。

图形概要