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Applications of ATILA FEM Software to Smart Materials

Applications of ATILA FEM Software to Smart Materials Book
Author : Kenji Uchino,Jean-Claude Debus
Publisher : Elsevier
Release : 2012-11-27
ISBN : 0857096311
Language : En, Es, Fr & De

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Book Description :

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

Applications of ATILA FEM software to smart materials Book
Author : K. Uchino
Publisher : Elsevier Inc. Chapters
Release : 2012-11-27
ISBN : 012808720X
Language : En, Es, Fr & De

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Book Description :

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

Applications of ATILA FEM software to smart materials Book
Author : A-C. Hladky-Hennion
Publisher : Elsevier Inc. Chapters
Release : 2012-11-27
ISBN : 0128087277
Language : En, Es, Fr & De

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Book Description :

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

Applications of ATILA FEM software to smart materials Book
Author : J-C. Debus
Publisher : Elsevier Inc. Chapters
Release : 2012-11-27
ISBN : 0128087218
Language : En, Es, Fr & De

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Book Description :

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

Applications of ATILA FEM software to smart materials Book
Author : A. Loussert,J.-C. Debus,G. Vanderborck
Publisher : Elsevier Inc. Chapters
Release : 2012-11-27
ISBN : 0128087293
Language : En, Es, Fr & De

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Book Description :

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

Applications of ATILA FEM software to smart materials Book
Author : K. Uchino
Publisher : Elsevier Inc. Chapters
Release : 2012-11-27
ISBN : 0128087226
Language : En, Es, Fr & De

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Book Description :

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

Applications of ATILA FEM software to smart materials Book
Author : J.-C. Debus
Publisher : Elsevier Inc. Chapters
Release : 2012-11-27
ISBN : 0128087315
Language : En, Es, Fr & De

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Book Description :

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

Applications of ATILA FEM software to smart materials Book
Author : J.-C. Debus
Publisher : Elsevier Inc. Chapters
Release : 2012-11-27
ISBN : 0128087307
Language : En, Es, Fr & De

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Book Description :

In this chapter, a coupled electromechanical thermal analysis is presented. For a steady-state solution, the thermal behaviour is weakly coupled to the electromechanical response. A simple model, a tonpilz, a doubled-ended and a flextensional transducer serve as validation of the numerical model compared to the analytical models. The transient thermal analysis is developed and the temperature and dissipated power distribution are obtained at each step. The validation concerns piezoelectric ring transducers driven at high power levels under continuous sine-wave drive. The aim of the second section of this chapter is to present heat generation in a magnetostrictive transducer. The development of heat generation is defined with two validations. The first example consists of a cylinder in vacuum, the second example shows the temperature behaviour of a Janus transducer; the results are compared with an analytical model and measurements.

Applications of ATILA FEM software to smart materials

Applications of ATILA FEM software to smart materials Book
Author : S.-J. Yoon
Publisher : Elsevier Inc. Chapters
Release : 2012-11-27
ISBN : 0128087269
Language : En, Es, Fr & De

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Book Description :

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.

Applications of ATILA FEM software to smart materials

Applications of ATILA FEM software to smart materials Book
Author : S.-H. Park
Publisher : Elsevier Inc. Chapters
Release : 2012-11-27
ISBN : 0128087250
Language : En, Es, Fr & De

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Book Description :

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

Applications of ATILA FEM software to smart materials Book
Author : A.-C. Hladky-Hennion
Publisher : Elsevier Inc. Chapters
Release : 2012-11-27
ISBN : 0128087285
Language : En, Es, Fr & De

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Book Description :

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

Applications of ATILA FEM software to smart materials Book
Author : J.-C. Debus
Publisher : Elsevier Inc. Chapters
Release : 2012-11-27
ISBN : 0128087234
Language : En, Es, Fr & De

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Book Description :

The vibration and sound radiation of structures, like plates or shells stiffened by frames or ribs, is a problem of interest in the analysis of aircraft and marine structures. If the ribs are uniformly spaced, then the composite structure is spatially periodic. Many authors have proposed solutions for stiffened infinite shells with simple shapes. But, when the shape is more complicated, such as for a submarine or an aircraft, the numerical methods are not appropriate and the finite element method seems justified with finite element characterizing the stiffeners. In this chapter, from the theory of shells with the complicating effects of anisotropy due to the stiffeners, one finite element is presented. After, the presentation of the boundary conditions on the shell, a first validation will be realized on circular cylindrical shells having tranverse stiffeners. The modes of vibration obtained from the new shell element are compared with analytical and experimental results. The second validation concerns an elastic target with a stiffened shell. The comparison is made between the use of the new shell element and a 3D analysis.

Applications of ATILA FEM software to smart materials

Applications of ATILA FEM software to smart materials Book
Author : J-C. Debus
Publisher : Elsevier Inc. Chapters
Release : 2012-11-27
ISBN : 0128087323
Language : En, Es, Fr & De

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Book Description :

Traditional transmitting materials, such as PZT-8, exhibit some non-linearity in stress and temperature, but predicting performance under high stress and higher temperatures can be achieved by taking advantage of the weak coupling. One needs to predict the performance of these devices by considering the highly non-linear behaviour with a fully non-linear solution procedure in the ATILA finite element software package. The aim of this chapter is to analyze the behaviour of simple devices submitted to a harmonic analysis. Analytical models are developed and compared with the numerical analysis via the ATILA code for several devices. ATILA does not have a non-linear solver yet. ATILA results are obtained with up-dated properties.

Applications of ATILA FEM software to smart materials

Applications of ATILA FEM software to smart materials Book
Author : J.-C. Debus
Publisher : Elsevier Inc. Chapters
Release : 2012-11-27
ISBN : 0128087242
Language : En, Es, Fr & De

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Book Description :

This chapter provides the utilization of piezoelectric polarization. In smart structures, the polarization and the electric field are not necessarily parallel to each other. However, applying an electric field in a particular direction may change the behaviour of the device. Sections 5.3 to 5.5 present the utilization of Cartesian polarization with different electric fields on a PZT cube and on a PZT ring to compare analytical and numerical (ATILA) solutions. On the same ring with a cylindrical polarization, analytical and numerical results are compared. In Section 5.6, using original polarization, two new designs of PZT actuator are studied. The first device consists of an open ring of piezoelectric material polarized in the thickness direction. Under an appropriate electrical field applied in the poling direction and/or the radial direction, the ring behaves as a spring having rectangular torsion behaviour. The second device consists of a simple stripe actuator with an original polarization. This actuator can be used as a flexing actuator similar to a bilaminar transducer. For these two actuators, numerical results obtained with the ATILA code and analytical results are compared with experimental findings.

FEM and Micromechatronics with ATILA Software

FEM and Micromechatronics with ATILA Software Book
Author : Kenji Uchino
Publisher : CRC Press
Release : 2018-10-03
ISBN : 1351835068
Language : En, Es, Fr & De

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Book Description :

Students preparing to work with mechatronics, particularly with highly precise and smart actuators, face the challenge of designing and analyzing devices without formal and practical guidance in computer techniques. Finally there is a textbook that is as practical as it is authoritative: Kenji Uchino's FEM and Micromechatronics with ATILA Software. Ideal for Today's Computer-Based Curricula Every aspect of this book reflects its focus on being easy to use, easy to teach from, and above all, easy to implement. The first half of the text outlines the theory needed to develop and design smart actuators and transducers, while the second half walks students step-by-step through the software implementation using seven extensive examples. Even the book's lay-flat binding makes it easy for students to follow the text while working simultaneously at a computer. The companion CD-ROM supplies a free educational version of ATILA-Light. Unified Coverage for Integrated Technologies Covering the myriad challenges posed by smart transducers, the author introduces the fundamentals of piezoelectric and magnetostrictive devices, practical materials, device designs, drive and control techniques, and typical applications. Numerous problems and examples give students ample opportunity to put the concepts into practice. Outlining a complete treatment in 30 convenient 75 minute lessons, FEM and Micromechatronics with ATILA Software is a unique classroom text that students will continue to use throughout their entire careers.

Rare Earth and Transition Metal Doping of Semiconductor Materials

Rare Earth and Transition Metal Doping of Semiconductor Materials Book
Author : Volkmar Dierolf,Ian Ferguson,John M Zavada
Publisher : Woodhead Publishing
Release : 2016-01-23
ISBN : 008100060X
Language : En, Es, Fr & De

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Book Description :

Rare Earth and Transition Metal Doping of Semiconductor Material explores traditional semiconductor devices that are based on control of the electron’s electric charge. This book looks at the semiconductor materials used for spintronics applications, in particular focusing on wide band-gap semiconductors doped with transition metals and rare earths. These materials are of particular commercial interest because their spin can be controlled at room temperature, a clear opposition to the most previous research on Gallium Arsenide, which allowed for control of spins at supercold temperatures. Part One of the book explains the theory of magnetism in semiconductors, while Part Two covers the growth of semiconductors for spintronics. Finally, Part Three looks at the characterization and properties of semiconductors for spintronics, with Part Four exploring the devices and the future direction of spintronics. Examines materials which are of commercial interest for producing smaller, faster, and more power-efficient computers and other devices Analyzes the theory behind magnetism in semiconductors and the growth of semiconductors for spintronics Details the properties of semiconductors for spintronics

Modeling Characterization and Production of Nanomaterials

Modeling  Characterization and Production of Nanomaterials Book
Author : V Tewary,Y Zhang
Publisher : Elsevier
Release : 2015-03-17
ISBN : 1782422358
Language : En, Es, Fr & De

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Book Description :

Nano-scale materials have unique electronic, optical, and chemical properties which make them attractive for a new generation of devices. Part one of Modeling, Characterization, and Production of Nanomaterials: Electronics, Photonics and Energy Applications covers modeling techniques incorporating quantum mechanical effects to simulate nanomaterials and devices, such as multiscale modeling and density functional theory. Part two describes the characterization of nanomaterials using diffraction techniques and Raman spectroscopy. Part three looks at the structure and properties of nanomaterials, including their optical properties and atomic behaviour. Part four explores nanofabrication and nanodevices, including the growth of graphene, GaN-based nanorod heterostructures and colloidal quantum dots for applications in nanophotonics and metallic nanoparticles for catalysis applications. Comprehensive coverage of the close connection between modeling and experimental methods for studying a wide range of nanomaterials and nanostructures Focus on practical applications and industry needs, supported by a solid outlining of theoretical background Draws on the expertise of leading researchers in the field of nanomaterials from around the world

Power Ultrasonics

Power Ultrasonics Book
Author : Juan A Gallego-Juárez,Karl F Graff
Publisher : Elsevier
Release : 2014-11-14
ISBN : 1782420363
Language : En, Es, Fr & De

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Book Description :

The industrial interest in ultrasonic processing has revived during recent years because ultrasonic technology may represent a flexible “green alternative for more energy efficient processes. A challenge in the application of high-intensity ultrasound to industrial processing is the design and development of specific power ultrasonic systems for large scale operation. In the area of ultrasonic processing in fluid and multiphase media the development of a new family of power generators with extensive radiating surfaces has significantly contributed to the implementation at industrial scale of several applications in sectors such as the food industry, environment, and manufacturing. Part one covers fundamentals of nonlinear propagation of ultrasonic waves in fluids and solids. It also discusses the materials and designs of power ultrasonic transducers and devices. Part two looks at applications of high power ultrasound in materials engineering and mechanical engineering, food processing technology, environmental monitoring and remediation and industrial and chemical processing (including pharmaceuticals), medicine and biotechnology. Covers the fundamentals of nonlinear propagation of ultrasonic waves in fluids and solids. Discusses the materials and designs of power ultrasonic transducers and devices. Considers state-of-the-art power sonic applications across a wide range of industries.

Laser Additive Manufacturing

Laser Additive Manufacturing Book
Author : Milan Brandt
Publisher : Woodhead Publishing
Release : 2016-09-01
ISBN : 0081004346
Language : En, Es, Fr & De

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Book Description :

Laser Additive Manufacturing: Materials, Design, Technologies, and Applications provides the latest information on this highly efficient method of layer-based manufacturing using metals, plastics, or composite materials. The technology is particularly suitable for the production of complex components with high precision for a range of industries, including aerospace, automotive, and medical engineering. This book provides a comprehensive review of the technology and its range of applications. Part One looks at materials suitable for laser AM processes, with Part Two discussing design strategies for AM. Parts Three and Four review the most widely-used AM technique, powder bed fusion (PBF) and discuss other AM techniques, such as directed energy deposition, sheet lamination, jetting techniques, extrusion techniques, and vat photopolymerization. The final section explores the range of applications of laser AM. Provides a comprehensive one-volume overview of advances in laser additive manufacturing Presents detailed coverage of the latest techniques used for laser additive manufacturing Reviews both established and emerging areas of application

Vehicular Communications and Networks

Vehicular Communications and Networks Book
Author : Wai Chen
Publisher : Elsevier
Release : 2015-03-09
ISBN : 1782422161
Language : En, Es, Fr & De

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Book Description :

Vehicular Communications and Networks: Architectures, Protocols, Operation and Deployment discusses VANETs (Vehicular Ad-hoc Networks) or VCS (Vehicular Communication Systems), which can improve safety, decrease fuel consumption, and increase the capacity of existing roadways and which is critical for the Intelligent Transportation System (ITS) industry. Part one covers architectures for VCS, part two describes the physical layer, antenna technologies and propagation models, part three explores protocols, algorithms, routing and information dissemination, and part four looks at the operation and deployment of vehicular communications and networks. Comprehensive coverage of the fundamental principles behind Vehicular Ad-hoc Networks (VANETS) and the rapidly growing need for their further development Thorough overview of the design and development of key technologies and devices Explores the practical application of this technology by outlining a number of case studies, testbeds and simulations employing vehicular communications and networks