Wrinkles, folds and ripplocations: unusual deformation structures of confined elastic sheets at non-zero temperatures

Debankur Das; Juergen Horbach; Peter Sollich; Tanusri Saha-Dasgupta; Surajit Sengupta

Wrinkles, folds and ripplocations: unusual deformation structures of confined elastic sheets at non-zero temperatures

Debankur Das, Juergen Horbach, Peter Sollich, Tanusri Saha-Dasgupta, Surajit Sengupta

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Abstract

We study the deformation of a fluctuating crystalline sheet confined between two flat rigid walls as a simple model for layered solids where bonds among atoms within the same layer are much stronger than those between layers. When subjected to sufficiently high loads in an appropriate geometry, these solids deform and fail in unconventional ways. Recent experiments suggest that configurations named ripplocations, where a layer folds backwards over itself, are involved. These structures are distinct and separated by large free energy barriers from smooth ripples of the atomic layers that are always present at any non-zero temperature. We use Monte Carlo simulation in combination with an umbrella sampling technique to obtain conditions under which such structures form and study their specific experimental signatures.

Original language	English
Journal	Physical Review Research
Publication status	Accepted/In press - 2 Nov 2020

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title = "Wrinkles, folds and ripplocations: unusual deformation structures of confined elastic sheets at non-zero temperatures",

abstract = "We study the deformation of a fluctuating crystalline sheet confined between two flat rigid walls as a simple model for layered solids where bonds among atoms within the same layer are much stronger than those between layers. When subjected to sufficiently high loads in an appropriate geometry, these solids deform and fail in unconventional ways. Recent experiments suggest that configurations named ripplocations, where a layer folds backwards over itself, are involved. These structures are distinct and separated by large free energy barriers from smooth ripples of the atomic layers that are always present at any non-zero temperature. We use Monte Carlo simulation in combination with an umbrella sampling technique to obtain conditions under which such structures form and study their specific experimental signatures.",

author = "Debankur Das and Juergen Horbach and Peter Sollich and Tanusri Saha-Dasgupta and Surajit Sengupta",

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journal = "Physical Review Research",

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T1 - Wrinkles, folds and ripplocations: unusual deformation structures of confined elastic sheets at non-zero temperatures

AU - Das, Debankur

AU - Horbach, Juergen

AU - Sollich, Peter

AU - Saha-Dasgupta, Tanusri

AU - Sengupta, Surajit

PY - 2020/11/2

Y1 - 2020/11/2

N2 - We study the deformation of a fluctuating crystalline sheet confined between two flat rigid walls as a simple model for layered solids where bonds among atoms within the same layer are much stronger than those between layers. When subjected to sufficiently high loads in an appropriate geometry, these solids deform and fail in unconventional ways. Recent experiments suggest that configurations named ripplocations, where a layer folds backwards over itself, are involved. These structures are distinct and separated by large free energy barriers from smooth ripples of the atomic layers that are always present at any non-zero temperature. We use Monte Carlo simulation in combination with an umbrella sampling technique to obtain conditions under which such structures form and study their specific experimental signatures.

AB - We study the deformation of a fluctuating crystalline sheet confined between two flat rigid walls as a simple model for layered solids where bonds among atoms within the same layer are much stronger than those between layers. When subjected to sufficiently high loads in an appropriate geometry, these solids deform and fail in unconventional ways. Recent experiments suggest that configurations named ripplocations, where a layer folds backwards over itself, are involved. These structures are distinct and separated by large free energy barriers from smooth ripples of the atomic layers that are always present at any non-zero temperature. We use Monte Carlo simulation in combination with an umbrella sampling technique to obtain conditions under which such structures form and study their specific experimental signatures.

M3 - Article

SN - 2643-1564

JO - Physical Review Research

JF - Physical Review Research

ER -

Wrinkles, folds and ripplocations: unusual deformation structures of confined elastic sheets at non-zero temperatures

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