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Lahini Y, Gottesman O, Amir A, et al. Nonmonotonic Aging and Memory Retention in Disordered Mechanical Systems. Phys Rev Lett. 2017;118(8):085501doi: 10.1103/PhysRevLett.118.085501.
Lahini, Y., Gottesman, O., Amir, A., & Rubinstein, S. M. (2017). Nonmonotonic Aging and Memory Retention in Disordered Mechanical Systems. Physical review letters, 118(8), 085501. https://doi.org/10.1103/PhysRevLett.118.085501
Lahini, Yoav, et al. "Nonmonotonic Aging and Memory Retention in Disordered Mechanical Systems." Physical review letters vol. 118,8 (2017): 085501. doi: https://doi.org/10.1103/PhysRevLett.118.085501
Lahini Y, Gottesman O, Amir A, Rubinstein SM. Nonmonotonic Aging and Memory Retention in Disordered Mechanical Systems. Phys Rev Lett. 2017 Feb 24;118(8):085501. doi: 10.1103/PhysRevLett.118.085501. Epub 2017 Feb 21. PMID: 28282188.
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Phys Rev Lett. 2017 Feb 24;118(8):085501. doi: 10.1103/PhysRevLett.118.085501. Epub 2017 Feb 21.

Nonmonotonic Aging and Memory Retention in Disordered Mechanical Systems.

Physical review letters

Yoav Lahini, Omer Gottesman, Ariel Amir, Shmuel M Rubinstein

Affiliations

  1. Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA.

PMID: 28282188 DOI: 10.1103/PhysRevLett.118.085501

Abstract

We observe nonmonotonic aging and memory effects, two hallmarks of glassy dynamics, in two disordered mechanical systems: crumpled thin sheets and elastic foams. Under fixed compression, both systems exhibit monotonic nonexponential relaxation. However, when after a certain waiting time the compression is partially reduced, both systems exhibit a nonmonotonic response: the normal force first increases over many minutes or even hours until reaching a peak value, and only then is relaxation resumed. The peak time scales linearly with the waiting time, indicating that these systems retain long-lasting memory of previous conditions. Our results and the measured scaling relations are in good agreement with a theoretical model recently used to describe observations of monotonic aging in several glassy systems, suggesting that the nonmonotonic behavior may be generic and that athermal systems can show genuine glassy behavior.

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