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A laterally confined thin elastic sheet lying on a liquid substrate displays regular undulations, called wrinkles, characterized by a spatially extended energy distribution and a well-defined wavelength $\lambda$. As the confinement…

软凝聚态物质 · 物理学 2015-06-30 Oz Oshri , Fabian Brau , Haim Diamant

We study the dynamic coarsening of wrinkles in an elastic sheet that is compressed while lying on a thin layer of viscous liquid. When the ends of the sheet are instantaneously brought together by a small distance, viscous resistance…

流体动力学 · 物理学 2017-03-24 Ousmane Kodio , Ian M. Griffiths , Dominic Vella

Mechanical deformation of amorphous solids can be described as consisting of an elastic part in which the stress increases linearly with strain, up to a yield point at which the solid either fractures or starts deforming plastically. It is…

无序系统与神经网络 · 物理学 2020-03-25 Baoshuang Shang , Pengfei Guan , Jean-Louis Barrat

For forty years researchers on ferroelectric switching have used the Kay-Dunn theory to model the thickness-dependence of the coercive field; it works surprisingly well, despite the fact that it is based upon homogeneous nucleation and a…

材料科学 · 物理学 2007-05-23 P. Chandra , M. Dawber , P. B. Littlewood , J. F. Scott

Amorphous solids increase their stress as a function of an applied strain until a mechanical yield point whereupon the stress cannot increase anymore, afterwards exhibiting a steady state with a constant mean stress. In stress controlled…

无序系统与神经网络 · 物理学 2017-06-07 Giorgio Parisi , Itamar Procaccia , Corrado Rainone , Murari Singh

A large electric field is typically present in anodic or passive oxide films. Stresses induced by such a large electric field are critical in understanding the breakdown mechanism of thin oxide films and improving their corrosion…

材料科学 · 物理学 2024-04-26 Jin Zhang , Peter W. Voorhees

(Shortened abstract) Snow slab avalanches release after the failure and collapse of a weak layer buried below a cohesive snow slab. This results in the propagation of a subsidence, known as a collapse wave or anticrack. The slab may…

地球物理 · 物理学 2023-02-20 Marin Siron , Bertil Trottet , Johan Gaume

This work is devoted so show the appearance of different cracking modes in linearly elastic thin film systems by means of an asymptotic analysis as the thickness tends to zero. By superposing two thin plates, and upon suitable scaling law…

偏微分方程分析 · 数学 2015-09-14 Jean-Francois Babadjian , Duvan Henao

We introduce a class of ultra-light and ultra-stiff sandwich panels designed for use in photophoretic levitation applications and investigate their mechanical behavior using both computational analyses and micro-mechanical testing. The…

Polycrystalline graphene has an inherent tendency to buckle, i.e. develop out-of-plane, three-dimensional structure. A force applied to stretch a piece of polycrystalline graphene influences the out-of-plane structure. Even if the graphene…

材料科学 · 物理学 2019-10-28 Federico D'Ambrosio , Vladimir Juričić , Gerard T. Barkema

We report on a simulational study of the compression and buckling of elastic ridges formed by joining the boundary of a flat sheet to itself. Such ridges store energy anomalously: their resting energy scales as the linear size of the sheet…

凝聚态物理 · 物理学 2009-11-07 B. A. DiDonna , T. A. Witten

We reformulate the theory of polycrystalline plasticity, in externally driven, nonequilibrium situations, by writing equations of motion for the flow of energy and entropy associated with dislocations. Within this general framework, and…

材料科学 · 物理学 2010-01-21 J. S. Langer , Eran Bouchbinder , Turab Lookman

In this work, a higher-order irrotational strain gradient plasticity theory is studied in the small strain regime. A detailed numerical study is based on the problem of simple shear of a non-homogeneous block comprising an elastic-plastic…

材料科学 · 物理学 2019-06-26 Nothando Mhlongo , B Daya Reddy

Thin elastic two-dimensionnal systems under compressive stresses may relieve part of their stretching energy by developing out of plane undulations. We investigate experimentally and theoretically the indentation of an elastic disk…

经典物理 · 物理学 2023-05-26 Tristan Suzanne , Julien Deschamps , Marc Georgelin , Gwenn Boedec

Ab initio density functional theory has been used to analyze flexural modes, elastic constants, and atomic corrugations on single and bi-layer graphene. Frequencies of flexural modes are sensitive to compressive stress; its variation under…

材料科学 · 物理学 2013-01-22 P. L. de Andres , F. Guinea , M. I. Katsnelson

Tree frogs are able take advantage of an interconnected network of epithelial cells in their toe pads to modulate their adhesion to surfaces under dry, wet, and flooded environments. It has been hypothesized that these interconnected…

软凝聚态物质 · 物理学 2015-02-10 Charles Dhong , Joelle Frechette

A certain appeal to the alpha model for turbulence and related viscosity in accretion disks was that one scales the Reynolds stresses simply on the thermal pressure, assuming that turbulence driven by a certain mechanism will attain a…

地球与行星天体物理 · 物理学 2021-09-22 Natascha Manger , Thomas Pfeil , Hubert Klahr

The thickness evolution of in-plane magnetization reversal in ultrathin films is studied with a theoretical model that takes account of surface roughness typical of epitaxial growth. Guided by N\'{e}el's model, step edge sites of…

材料科学 · 物理学 2007-05-23 R. A. Hyman , A. Zangwill , M. D. Stiles

Tearing a thin sheet by forcing a rigid object through it leads to complex crack morphologies; a single oscillatory crack arises when a tool is driven laterally through a brittle sheet, while two diverging cracks and a series of…

材料科学 · 物理学 2015-05-30 T. Tallinen , L. Mahadevan

Various recent experiments hint at a geometry dependence of scaling relations in Rayleigh-B\'enard convection. Aspect ratio and shape dependences have been found. In this paper a mechanism is offered which can account for such dependences.…

混沌动力学 · 物理学 2009-11-07 Siegfried Grossmann , Detlef Lohse