Título del libro: Material Modelling: Applications, Challenges And Research
Título del capítulo: Modeling of smart piezoelectric sensors: Determining effective properties with interfacial bonding conditions
JULIAN BRAVO CASTILLERO;
Autores externos:
Idioma:
Inglés
Año de publicación:
2017
Palabras clave:
Aerospace industry; Electric sensing devices; Energy harvesting; Fibers; Homogenization method; Piezoelectric devices; Piezoelectric materials; Piezoelectric transducers; Piezoelectricity; Structural health monitoring; Volume fraction; Asymptotic homogenization method; Effective property; Interfacial bonding; Materials science and technology; Mechanical and physical properties; Piezoelectric sensors; Representative volume element (RVE); Structural health monitoring (SHM); Finite element method
Resumen:
Smart composite materials present great potential for applications in the aerospace industry as sensors and/or actuators for noise and vibration control, flow control, energy harvesting, and structural health monitoring (SHM). The macroscopic properties of piezoelectric composites depend upon not only the properties and the microstructures of the composites, but also the interfacial bonding conditions of the constituent phases. Thus, the effect of the interfacial bonding conditions on the mechanical and physical properties of various composites has attracted a lot of researchers? attention in many fields - especially in physics, materials science and technology - and mechanics. The prediction of the effective moduli when taking into account interface effect is one of the fundamental problems in the mechanics of composites. Numerical and analytical approaches have been investigated in order to determine the effective properties of piezoelectric fibers embedded in a non-piezoelectric matrix, considering perfect and imperfect contact between fibers and the matrix. Therefore, this chapter focuses on modeling active fiber composites made of either circular or square cross-section fibers not only by using finite element method (FEM) and representative volume elements (RVE), but also via the asymptotic homogenization method (AHM). On the one hand, based on a finite element approach, the RVE for different loadings with suitable boundary conditions is analysed. Transversely isotropic piezoelectric materials with circular and square cross-section fibers are analysed for square arrangements with different fiber volume fractions as well as with perfect and imperfect contact conditions. The three-phase elastic problem using the numerical and analytical homogenization technique, and the two-phase elastic problem with one imperfect interphase using the analytical homogenization technique are used to model elastic imperfect interfaces in the composite. The comparison between numerical and analytical approaches shows that the results from FEM are in good agreement with investigations performed by AHM. In addition, the results with imperfect contact are discussed, observing the influence of the fiber volume fraction and the level of the imperfection in the fiber-matrix adhesion. Results show that the imperfect contact not only affects the elastic constants, but also the piezoelectric effective values. © 2017 Nova Science Publishers, Inc.
Entidades citadas de la UNAM:
ISBN:
9781536121926
Editorial:
Nova Science Publishers, Inc. Nombre de la publicación:
Modeling of smart piezoelectric sensors: Determining effective properties with interfacial bonding conditions
Página inicial:
107
Página final:
143
Tipo de producto:
Capítulo de un Libro
