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Flexoelectricity in nanobeams under torsion

Authors: Moliner Martinez, Jordi;

Flexoelectricity in nanobeams under torsion

Abstract

En este trabajo, estudiamos la respuesta flexoeléctrica de los nanovigas bajo torsión tanto analítica como computacionalmente. Primero mostramos con un modelo analítico simplificado que, de hecho, se puede obtener una polarización en un cono truncado bajo torsión. Las ecuaciones gobernantes acopladas de la flexoelectricidad se resuelven entonces de la misma geometría. Dado que estas ecuaciones implican derivadas espaciales de alto orden, no podemos usar elementos finitos. Aquí recurrimos a un método basado en funciones de forma suave, proporcionando así continuidad y derivabilidad para simular el efecto flexoeléctrico. Ambos los resultados analíticos y numéricos se comparan y discuten. Finalmente, otras geometrías son analizados y comparados entre ellos utilizando simulaciones numéricas para evaluar la respuesta flexoeléctrica.

In this work, we explore this possibility by studying the exoelectric response of nanobeams under torsion both analytically and computationally. We rst show with a simpli ed an- alytical model that a polarization can indeed be obtained in a truncated cone under torsion. The coupled governing equations of exoelectricity are then solved in the same geometry. Since these equations involve high-order spatial derivatives, standard C⁰ nite elements cannot be used. Here we resort to a method based on smooth shape functions, thus providing both continuity and derivability to simulate the exoelectric e ect. Both analytical and numerical results are compared and discussed. Finally, other geometries are analyzed and compared among them using numerical simulations to evaluate the flexoelectric response.

Descargue el texto completo en el repositorio institucional de la Universidad Politécnica de Cataluña: https://upcommons.upc.edu/handle/2117/91478

Country
Spain
Keywords

https://purl.org/pe-repo/ocde/ford#2.01.01, polarization, Polarización (Electricidad), Bigues, Àrees temàtiques de la UPC::Enginyeria dels materials::Assaig de materials, Girders, Flexoelectricidad, Nanobeams, electromechanical, simulation, gradient, numerical, strain, Polarization (Electricity), flexoelectricity, method, :Enginyeria dels materials::Assaig de materials [Àrees temàtiques de la UPC], coupling, Torsión, Polarització (Electricitat)

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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