Download or read book Applications of ATILA FEM Software to Smart Materials written by Kenji Uchino and published by Elsevier. This book was released on 2012-11-27 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

Download or read book Applications of ATILA FEM software to smart materials written by K. Uchino and published by Elsevier Inc. Chapters. This book was released on 2012-11-27 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Applications of ATILA FEM software to smart materials written by A-C. Hladky-Hennion and published by Elsevier Inc. Chapters. This book was released on 2012-11-27 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Applications of ATILA FEM software to smart materials written by J-C. Debus and published by Elsevier Inc. Chapters. This book was released on 2012-11-27 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Applications of ATILA FEM software to smart materials written by J.-C. Debus and published by Elsevier Inc. Chapters. This book was released on 2012-11-27 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Applications of ATILA FEM software to smart materials written by J.-C. Debus and published by Elsevier Inc. Chapters. This book was released on 2012-11-27 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Applications of ATILA FEM software to smart materials written by A. Loussert and published by Elsevier Inc. Chapters. This book was released on 2012-11-27 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Applications of ATILA FEM software to smart materials written by S.-H. Park and published by Elsevier Inc. Chapters. This book was released on 2012-11-27 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Applications of ATILA FEM software to smart materials written by K. Uchino and published by Elsevier Inc. Chapters. This book was released on 2012-11-27 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Applications of ATILA FEM software to smart materials written by S.-J. Yoon and published by Elsevier Inc. Chapters. This book was released on 2012-11-27 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Applications of ATILA FEM software to smart materials written by J.-C. Debus and published by Elsevier Inc. Chapters. This book was released on 2012-11-27 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Applications of ATILA FEM software to smart materials written by J.-C. Debus and published by Elsevier Inc. Chapters. This book was released on 2012-11-27 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Applications of ATILA FEM software to smart materials written by A.-C. Hladky-Hennion and published by Elsevier Inc. Chapters. This book was released on 2012-11-27 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Applications of ATILA FEM software to smart materials written by J-C. Debus and published by Elsevier Inc. Chapters. This book was released on 2012-11-27 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book FEM and Micromechatronics with ATILA Software written by Kenji Uchino and published by CRC Press. This book was released on 2018-10-03 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Ecological Design of Smart Home Networks written by N. Saito and published by Elsevier. This book was released on 2015-03-31 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an authoritative guide for postgraduate students and academic researchers in electronics, computer and network engineering, telecommunications, energy technology and home automation, as well as R&D managers in industrial sectors such as wireless technology, consumer electronics, telecommunications and networking, information technology, energy technology and home automation. Part One outlines the key principles and technologies needed for ecological smart home networks. Beginning with a thorough overview of the concept behind ecological smart home network design, the book reviews such important areas as power line communications, hybrid systems and middleware platforms. Part Two then goes on to discuss some important applications of this technology, with wireless smart sensor networks for home and telecare, and smart home networking for content and energy management (including the intelligent Zero Emission Urban System), all explored in detail. - More systematic and comprehensive coverage: the book covers ecological design and technology requirements, performance and applications for smart home networks - Better focus on industry needs: the book covers current and emerging smart home networking technologies. It explains how the technologies work, how they have developed, their capabilities and the markets that they target - Better coverage of the best international research: the book is multi-contributor and brings together the leading researchers from around the world

Download or read book Smart Sensors and MEMS written by S Nihtianov and published by Woodhead Publishing. This book was released on 2014-03-24 with total page 563 pages. Available in PDF, EPUB and Kindle. Book excerpt: Smart sensors and MEMS can include a variety of devices and systems that have a high level of functionality. They do this either by integrating multiple sensing and actuating modes into one device, or else by integrating sensing and actuating with information processing, analog-to-digital conversion and memory functions.Part one outlines the industrial applications for smart sensors, covering direct interface circuits for sensors, capacitive sensors for displacement measurement in the sub-nanometer range, integrated inductive displacement sensors for harsh industrial environments, advanced silicon radiation detectors in the vacuum ultraviolet (VUV) and extreme ultraviolet (EUV) spectral range, and advanced optical incremental sensors (encoders and interferometers), among other topics. The second part of the book describes the industrial applications of smart micro-electro-mechanical systems (MEMS). Some of the topics covered in this section include microfabrication technologies used for creating smart devices for industrial applications, microactuators, dynamic behaviour of smart MEMS in industrial applications, MEMS integrating motion and displacement sensors, MEMS print heads for industrial printing, Photovoltaic and fuel cells in power MEMS for smart energy management, and radio frequency (RF)-MEMS for smart communication microsystems.Smart sensors and MEMS is invaluable reference for academics, materials scientists and electrical engineers working in the microelectronics, sensors and micromechanics industry, and engineers looking for industrial sensing, monitoring and automation solutions. - Outlines industrial applications for smart sensors and smart MEMS - Covers smart sensors including capacitive, inductive, resistive and magnetic sensors and sensors to detect radiation and measure temperature - Covers smart MEMS including power MEMS, radio frequency MEMS, optical MEMS, inertial MEMS, and microreaction chambers