A Coupled Electro-Mechanical Homogenization-Based Model for PVDF-Based Piezo-Composites Considering α → β Phase Transition and Interfacial Damage

Fateh Enouar Mamache; Amar Mesbah; Fahmi Zaïri; Iurii Vozniak

doi:10.3390/polym15142994

A Coupled Electro-Mechanical Homogenization-Based Model for PVDF-Based Piezo-Composites Considering α → β Phase Transition and Interfacial Damage

Polymers (Basel). 2023 Jul 10;15(14):2994. doi: 10.3390/polym15142994.

Authors

Fateh Enouar Mamache¹, Amar Mesbah¹, Fahmi Zaïri², Iurii Vozniak³

Affiliations

¹ University of Sciences and Technology Houari Boumediene, Laboratory of Advanced Mechanics, Algiers 16111, Algeria.
² Univ. Lille, IMT Nord Europe, JUNIA, Univ. Artois, ULR 4515-LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000 Lille, France.
³ Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza Str., 112, 90363 Lodz, Poland.

Abstract

Polyvinylidene fluoride or polyvinylidene difluoride (PVDF) is a piezoelectric semi-crystalline polymer whose electro-mechanical properties may be modulated via strain-induced α → β phase transition and the incorporation of polarized inorganic particles. The present work focuses on the constitutive representation of PVDF-based piezo-composites developed within the continuum-based micromechanical framework and considering the combined effects of particle reinforcement, α → β phase transition, and debonding along the interface between the PVDF matrix and the particles under increasing deformation. The micromechanics-based model is applied to available experimental data of PVDF filled with various concentrations of barium titanate (BaTiO₃) particles. After its identification and predictability verification, the model is used to provide a better understanding of the separate and synergistic effects of BaTiO₃ particle reinforcement and the micromechanical deformation processes on the electro-mechanical properties of PVDF-based piezo-composites.

Keywords: damage; micromechanical model; piezoelectric composites; α → β phase transition.

Grants and funding

This work was financially supported by the University of Science and Technology Houari Boumediene and the Algerian Ministry of Higher Education and Scientific Research within the international scientific cooperation program.