Department of Physics, University of Chicago, Chicago, IL 60637;
The James Franck Institute, University of Chicago, Chicago, IL 60637.
Proc Natl Acad Sci U S A. 2020 Dec 15;117(50):31690-31695. doi: 10.1073/pnas.1922847117. Epub 2020 Nov 30.
We consider disordered solids in which the microscopic elements can deform plastically in response to stresses on them. We show that by driving the system periodically, this plasticity can be exploited to train in desired elastic properties, both in the global moduli and in local "allosteric" interactions. Periodic driving can couple an applied "source" strain to a "target" strain over a path in the energy landscape. This coupling allows control of the system's response, even at large strains well into the nonlinear regime, where it can be difficult to achieve control simply by design.
我们研究的是在微观元素能够对施加在它们身上的应力做出塑性变形的无序固体。我们证明，通过周期性地驱动系统，这种塑性可以被利用来训练所需的弹性特性，包括全局模量和局部“变构”相互作用。周期性驱动可以在能量景观中的路径上将施加的“源”应变耦合到“目标”应变。这种耦合允许控制系统的响应，即使在大应变下也进入非线性区域，在这个区域中，仅仅通过设计很难实现控制。
