Numerical calculation of homogenized properties of piezoelectric composites

Download

10510748.pdf

Date

2022-11-25

Author

Kurt, Mustafa

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

253
views

287
downloads

Piezoelectric materials are the materials we use in many parts of our lives without being aware. These materials can convert electrical energy into mechanical energy or vice versa. Although this ability renders piezoelectric ceramics very attractive materials for sensing and actuation applications, their use often remains limited, due to their weight and brittleness. As a result of these drawbacks, piezoelectric composites are developed, and they offer superior performance compared to monolithic piezoelectric materials. The main aim of this study is to numerically calculate the effective material properties (elastic, piezoelectric, and dielectric) of piezoelectric composites to determine the behavior and performance of the piezoelectric composites. With micromechanical methods, the overall behavior of piezoelectric composites is obtained by using the properties of their constituents through a finite element analysis of a periodic representative volume element (RVE) or a unit cell model. In this study, different piezoelectric fiber composites are studied. The most encountered piezocomposite in the literature is 1-3 type piezocomposites, whose full set of material moduli is extracted using the homogenization method. The results are verified with experimental data and different numerical studies from the literature. The homogenization method is validated with a macro-scale boundary value problem and the results are compared with a numerical study from the literature. Moreover, porous piezoceramics are investigated. The effects of size, shape, and distribution of pores upon the effective material properties and performance coefficients are investigated. Finally, the porosity is incorporated into the 1-3 piezocomposites and its influence on the hydrostatic performance coefficients is investigated.

Subject Keywords

Piezoelectricity, Composite, Homogenization, Finite element analysis, Porosity

URI

https://hdl.handle.net/11511/101170

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

ESTIMATING THE EFFECT OF CHIRALITY AND SIZE ON THE MECHANICAL PROPERTIES OF CARBON NANOTUBES THROUGH FINITE ELEMENT MODELLING Zuberi, Muhammad Jibran Shahzad; Esat, Volkan (2014-06-27) Carbon nanotubes (CNTs) are considered to be one of the contemporary materials exhibiting superior mechanical, thermal and electrical properties. A new generation state-of-the-art composite material, carbon nanotube reinforced polymer (CNTRP), utilizes carbon nanotubes as the reinforcing fibre element. CNTRPs are highly promising composite materials possessing the potential to be used in various areas such as automotive, aerospace, defence, and energy sectors.
Modeling of Spherulite Microstructures in Semicrystalline Polymers Oktay, Hasan Emre; Gürses, Ercan (2014-09-04) Polymers constitute an important class of materials with a wide range of application areas in modern life. Among these, semicrystalline polymers (SCP), such as high-density polyethylene (HDPE), Nylon-6, poly(ethylene terephthalate) (PET), isotactic polypropylene (iPP) and ultra high molecular weight polyethylene (UHMWPE), form a sub-set with a significant technological interest. Owing to remarkable deformability and toughness, good impact strength, very low gas-permeability, superior wear resistance and bio...
Energy consumption characteristics of turn-mill machining Moradnazhad, Mariyeh; ÜNVER, HAKKI ÖZGÜR (2017-07-01) Reducing the energy consumption of manufacturing processes and machine tools can considerably affect the environmental and economic impact of industrial activities. Since the 2008 global financial crisis, many scholars have focused on modeling the energy consumption of basic machining processes such as turning, milling or grinding, etc., and investigated the consumption characteristics of related machine tools. At the same time, various industries have increased their use of more complex and hybrid machine ...
DEVELOPMENT OF POLYMER MATRIX COMPOSITES WITH TUNABLE DIELECTRIC PROPERTIES Özkaragöz, Nadire Nazlı; Dericioğlu, Arcan Fehmi; Department of Metallurgical and Materials Engineering (2022-2-08) Ferroelectric materials are used in different applications because of their superior electrical and dielectric properties. Ferroelectric materials are polarized when an electrical field is applied to the material. This spontaneous polarization continues even if an electrical field is removed. BST (Barium Strontium Titanate) is one of the attractive ferroelectric materials which has a high dielectric constant and low dielectric loss tangent (tanδ). High dielectric constant and low loss tangent are necessary ...
Rheological analysis of ceramic pastes Özkan, Necati; Briscoe, Brian J.; Aydin, Ismail (1999-12-01) This paper is concerned with a number of means of characterising the rheological properties of a ceramic paste. The intrinsic flow behaviour of the paste, during upsetting, is studied experimentally by using multi coloured paste samples, as well as by a finite element numerical computation. The flow behaviour of the paste is approximated by an elasto-viscoplastic material constitutive model and implemented by using an established finite element code. The material flow properties, which are necessary for the...

Citation Formats

M. Kurt, “Numerical calculation of homogenized properties of piezoelectric composites,” M.S. - Master of Science, Middle East Technical University, 2022.