Publication detail

Influence of flexoelectricity on an interface crack between two dissimilar dielectric materials

SLÁDEK, J. SLÁDEK, V. HRYTSYNA, M. PROFANT, T.

Original Title

Influence of flexoelectricity on an interface crack between two dissimilar dielectric materials

Type

conference paper

Language

English

Original Abstract

In the present paper, the interface crack between two dissimilar dielectric materials under a mechanical load is investigated with including flexoelectricity effects. Flexoelectricity is a size dependent electro-mechanical coupling phenomenon, where the electric polarization is induced by a strain gradient in dielectrics. The strain gradients may potentially break the inversion symmetry in centrosymmetric crystals and polarization is observed even in all dielectric materials. The polarization is proportional to the strain gradients in the direct flexoelectricity. Layered composite structures are frequently utilized in microelectronics. Due to a poor adhesion of protection layer and basic material, the interface crack can be created there and for the prediction of failure of these structures it becomes essential to investigate distribution of the interfacial stress and strain fields. Governing equations in the gradient theory contain higher-order derivatives than in the standard continuum mechanics. Therefore, a reliable computational tool is required to solve these boundary-value problems. The mixed finite element method (FEM) is developed, where the standard C0 continuous finite elements are utilized for independent approximations of displacements and strains. The constraints between the strain gradients and displacements are satisfied by collocation at Gaussian integration points inside elements. In numerical examples, a parametric study is performed with respect to flexoelectric and elastic coefficients for both material regions. The influence of these parameters on the crack opening displacement is discussed.

Keywords

Direct flexoelectricitygradient theory, pure mechanical loadinduced electric potential

Authors

SLÁDEK, J.; SLÁDEK, V.; HRYTSYNA, M.; PROFANT, T.

Released

3. 6. 2023

Publisher

Elsevier B.V.

ISBN

9781713870302

Book

23rd European Conference on Fracture, ECF 2022

Edition

Procedia Structural Integrity

Edition number

42

ISBN

2452-3216

Periodical

Procedia Structural Integrity

Year of study

42

State

Republic of Italy

Pages from

1584

Pages to

1590

Pages count

7

URL

https://www.sciencedirect.com/science/article/pii/S2452321622007570?pes=vor

Full text in the Digital Library

http://hdl.handle.net/11012/244977

BibTex

@inproceedings{BUT187833,
  author="Ján {Sládek} and Vladimír {Sládek} and Maryan {Hrytsyna} and Tomáš {Profant}",
  title="Influence of flexoelectricity on an interface crack between two dissimilar dielectric materials",
  booktitle="23rd European Conference on Fracture, ECF 2022",
  year="2023",
  series="Procedia Structural Integrity",
  journal="Procedia Structural Integrity",
  volume="42",
  number="42",
  pages="1584--1590",
  publisher="Elsevier B.V.",
  doi="10.1016/j.prostr.2022.12.200",
  isbn="9781713870302",
  issn="2452-3216",
  url="https://www.sciencedirect.com/science/article/pii/S2452321622007570?pes=vor"
}