Applications Of Atila Fem Software To Smart Materials
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Applications Of Atila Fem Software To Smart Materials
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Author : Kenji Uchino
language : en
Publisher: Elsevier
Release Date : 2012-11-27
Applications Of Atila Fem Software To Smart Materials written by Kenji Uchino and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-27 with Computers categories.
ATILA Finite Element Method (FEM) software facilitates the modelling and analysis of applications using piezoelectric, magnetostrictor and shape memory materials. It allows entire designs to be constructed, refined and optimized before production begins. Through a range of instructive case studies, Applications of ATILA FEM software to smart materials provides an indispensable guide to the use of this software in the design of effective products.Part one provides an introduction to ATILA FEM software, beginning with an overview of the software code. New capabilities and loss integration are discussed, before part two goes on to present case studies of finite element modelling using ATILA. The use of ATILA in finite element analysis, piezoelectric polarization, time domain analysis of piezoelectric devices and the design of ultrasonic motors is considered, before piezo-composite and photonic crystal applications are reviewed. The behaviour of piezoelectric single crystals for sonar and thermal analysis in piezoelectric and magnetostrictive materials is also discussed, before a final reflection on the use of ATILA in modelling the damping of piezoelectric structures and the behaviour of single crystal devices.With its distinguished editors and international team of expert contributors, Applications of ATILA FEM software to smart materials is a key reference work for all those involved in the research, design, development and application of smart materials, including electrical and mechanical engineers, academics and scientists working in piezoelectrics, magenetostrictors and shape memory materials. - Provides an indispensable guide to the use of ATILA FEM software in the design of effective products - Discusses new capabilities and loss integration of the software code, before presenting case studies of finite element modelling using ATILA - Discusses the behaviour of piezoelectric single crystals for sonar and thermal analysis in piezoelectric and magnetostrictive materials, before a reflection on the use of ATILA in modelling the damping of piezoelectric structures
Applications Of Atila Fem Software To Smart Materials
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Author : K. Uchino
language : en
Publisher: Elsevier Inc. Chapters
Release Date : 2012-11-27
Applications Of Atila Fem Software To Smart Materials written by K. Uchino and has been published by Elsevier Inc. Chapters this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-27 with Technology & Engineering categories.
Finite element analysis can be applied to smart structures with piezoelectric or magnetostrictive materials rather successfully when neither the applying electric field nor the generating AC strain is very large and when the linear relation can be supposed in the strain vs electric field or the strain vs stress. However, further improvement in the FEM algorithm is required for high field or high power drive of the piezoelectric system, where nonlinear and hysteretic characteristics should be taken into account, as well as heat generation. In this chapter, we will discuss the high power issues. There are three hysteresis loss components for piezoelectric vibrators, i.e., dielectric, elastic and piezoelectric losses. Mechanical quality factors play a significant role in the loss study of piezoelectrics, and they are basically related to all dielectric, elastic and piezoelectric loss factors. Besides, a higher quality factor at the antiresonance is usually observed in the PZT based experiments, in comparison with that at the resonance. ATILA is the unique software for adopting dielectric, elastic and piezoelectric losses separately to calculate the impedance/admittance curve.
Applications Of Atila Fem Software To Smart Materials
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Author : A. Loussert
language : en
Publisher: Elsevier Inc. Chapters
Release Date : 2012-11-27
Applications Of Atila Fem Software To Smart Materials written by A. Loussert and has been published by Elsevier Inc. Chapters this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-27 with Technology & Engineering categories.
For underwater applications and manufacture of sonar for autonomous underwater vehicles (AUV), large areas of piezoelectric materials with very good electromechanical properties are often needed. Piezoelectric single crystals (typically the compositions PMN-PT or PZN-PT) are high-performance materials (high yields), but are difficult to manufacture in large areas while maintaining homogeneous properties. This study on the behavior of piezoelectric single crystals will be conducted with the use of a finite-element code (ATILA) which was developed at ISEN in collaboration with the French Ministry of Defense. The results confirm the good fit between the models and experimental results after a phase of optimization.
Applications Of Atila Fem Software To Smart Materials
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Author : S.-H. Park
language : en
Publisher: Elsevier Inc. Chapters
Release Date : 2012-11-27
Applications Of Atila Fem Software To Smart Materials written by S.-H. Park and has been published by Elsevier Inc. Chapters this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-27 with Technology & Engineering categories.
This chapter describes time domain analysis capabilities of ATILA which might be useful in evaluating acoustic wave propagation and reflection by transducers, transient signal response of sensors, and overshoot and ringing behaviors for actuators. Three examples from different application fields were selected to show how time domain analysis can be achieved in ATILA, focusing on an analytical approach in simulation modeling, decisions based on transient module parameters, and interpretation of time domain results.
Applications Of Atila Fem Software To Smart Materials
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Author : A-C. Hladky-Hennion
language : en
Publisher: Elsevier Inc. Chapters
Release Date : 2012-11-27
Applications Of Atila Fem Software To Smart Materials written by A-C. Hladky-Hennion and has been published by Elsevier Inc. Chapters this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-27 with Technology & Engineering categories.
Periodic structures have attracted considerable interest over the past three decades. Thus, passive structures with 1D or 2D periodicity are in standard use in underwater acoustics. Moreover doubly periodic active structures, such as 1–3 piezocomposite materials made of parallel piezoelectric bars embedded in a passive matrix, are also of great interest for mine hunting, underwater or medical ultrasonic imaging. In this chapter, a brief presentation of passive and active periodic structures is described. Then, the generic model developed for periodic studies is presented for the particular case of a 1–3 piezocomposite. The periodic structure is immersed in a fluid and the transmission and reflection coefficients are calculated. The test example discussed at the end of the chapter is devoted to an actual Alberich coating and an actual 1–3 piezocomposite for which previous experimental results are available.
Applications Of Atila Fem Software To Smart Materials
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Author : J.-C. Debus
language : en
Publisher: Elsevier Inc. Chapters
Release Date : 2012-11-27
Applications Of Atila Fem Software To Smart Materials written by J.-C. Debus and has been published by Elsevier Inc. Chapters this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-27 with Technology & Engineering categories.
The damping of a structure can be obtained by a transfer of the vibratory energy into thermal energy (dissipation in an electrical resistance). The transfer is carried out by using piezoelectric materials (PZT piezoelectric plate) and is improved by charging the piezoelectric material by an electrical circuit. This chapter describes finite element-electric circuit matrices created in the ATILA code. First, analytical models have been developed for the damping of a piezoelectric cylinder and a cantilever beam with a PZT plate; the results are compared with the numerical values (ATILA). Then, the damping of a cantilever beam charged by an electrical circuit is measured at the end of the beam using a laser vibrometer and compared with the numerical results. Finally, the vibrations damping is studied on a large aluminium plate; experimental and numerical results are compared.
Applications Of Atila Fem Software To Smart Materials
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Author : A.-C. Hladky-Hennion
language : en
Publisher: Elsevier Inc. Chapters
Release Date : 2012-11-27
Applications Of Atila Fem Software To Smart Materials written by A.-C. Hladky-Hennion and has been published by Elsevier Inc. Chapters this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-27 with Technology & Engineering categories.
Phononic crystals (PCs) are usually defined as artificial materials made of periodic arrangement of scatterers embedded in a matrix. The band structure of PCs may present under certain conditions absolute band gaps: they display frequency ranges in which waves cannot propagate. This fact is analogous to photonic band gaps for electromagnetic waves. Therefore, such systems can be applied as noise and vibration isolation, acoustic wave guiding, acoustic filters, etc. Moreover, band structures of PCs may exhibit dispersion curves with a negative slope, inducing negative refraction phenomenon. In this chapter, the general formalism is first presented. It is applied in the second part to a phononic crystal inducing filtering application and in the last section, negative refraction of elastic waves is presented for focusing application.
Applications Of Atila Fem Software To Smart Materials
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Author : K. Uchino
language : en
Publisher: Elsevier Inc. Chapters
Release Date : 2012-11-27
Applications Of Atila Fem Software To Smart Materials written by K. Uchino and has been published by Elsevier Inc. Chapters this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-27 with Technology & Engineering categories.
The finite element method and its application to smart transducer systems are introduced in this chapter. The fundamentals of finite element analysis are introduced first. Then, the section ‘Defining the equations for the problem’ treats how to integrate the piezoelectric constitutive equations, and ‘Application of the finite element method’ describes the meshing. The last section ‘FEM simulation examples’ introduces six cases; multilayer actuator, Π-type linear ultrasonic motor, windmill ultrasonic motor, metal tube ultrasonic motor, piezoelectric transformer, and ‘cymbal’ underwater transducer, which includes most of the basic capabilities of ATILA FEM code.
Applications Of Atila Fem Software To Smart Materials
DOWNLOAD
Author : J-C. Debus
language : en
Publisher: Elsevier Inc. Chapters
Release Date : 2012-11-27
Applications Of Atila Fem Software To Smart Materials written by J-C. Debus and has been published by Elsevier Inc. Chapters this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-27 with Technology & Engineering categories.
The aim of this chapter is to compare the new version of ATILA (ATILA++) with the previous one. In Section 2.3, the new developments in the pre- and post-processor are presented. Then in Section 2.5, a time comparison is made from several examples. With a first example which is a 3D electromechanical structure, the CPU and real times are compared for the computation of the 10 resonance and anti-resonance frequencies and for a harmonic analysis of 30 frequencies. The second example concerns a fluid harmonic analysis with 30 frequencies of a piezoelectric transducer. A thermal harmonic analysis is performed on a piezoelectric cylinder. Using the same cylinder, a transient analysis is carried with 100 time steps. For each analysis, the CPU and real times are presented and a comparison is made between the two versions.
Applications Of Atila Fem Software To Smart Materials
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Author : S.-J. Yoon
language : en
Publisher: Elsevier Inc. Chapters
Release Date : 2012-11-27
Applications Of Atila Fem Software To Smart Materials written by S.-J. Yoon and has been published by Elsevier Inc. Chapters this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-27 with Technology & Engineering categories.
Piezoelectric ultrasonic motors offer many advantages such as high retention being very controllable, high torque at low speed, light weight, simple structure and no electromagnetic field induction compared with the conventional electromagnetic motors. These advantages have helped to expand the application fields where precise position control and rotational/linear motions can be utilized. One of the most remarkable features of the compact ultrasonic motor is that it has higher design flexibility compared with that of the conventional electromagnetic motors whose efficiency significantly decreases with miniaturization. In order to build a novel ultrasonic motor for a specific purpose, it is essential to examine the structural design and the electrical and mechanical properties prior to preparing a real motor. The ATILA simulation tool offers useful information related to the performance for a designed piezoelectric ultrasonic motor. A real motor can therefore easily be manufactured with minimized trial and error. In this chapter, two types of tiny motors are presented, including the process of ATILA simulation and the fabrication of ultrasonic piezoelectric motors.