论文标题
活跃的固体偏差与平衡力学的最小模型
Minimal model of an active solid deviates from equilibrium mechanics
论文作者
论文摘要
在这项工作中，一维活动固体的机械响应 - 被定义为通过非线性硬弹簧相互作用的活性随机颗粒网络 - 受外部变形力的影响，以最小的模型进行了数值研究并合理化。据发现，由线性弹簧制成并受到外部应力的活跃固体，提出了与系统活动无关的平均变形。但是，当主动固体由非线性硬弹簧制成时，在相同条件下的被动系统以及系统中的活动和旋转噪声的函数相对于被动系统的平均变形降低。后一个结果可能会阐明创建主动超材料的新方法，这可以通过移动其活性或旋转噪声来调整其刚度。
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.
