Download or read book Fatigue Crack Growth in Ferroelectric Ceramics Under Cycle Electric Field written by Li Chen Collier and published by . This book was released on 1994 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue in Ferroelectric Ceramics and Related Issues written by Doru Constantin Lupascu and published by Springer Science & Business Media. This book was released on 2004-01-14 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major barrier to the introduction of ferroelectric devices into mass markets remains their limited reliability due to fatigue. The underlying physical and chemical mechanisms of this material fatigue phenomenon are extremely complex, and the relevant influences range from single-point defects to macroscopic boundary conditions. This book summarizes the different aspects of fatigue in ferroelectrics. It is primarily concerned with bulk material effects. Mechanical, electrical, and physico-chemical processes are described; reference data are given for different loading regimes and boundary conditions; and various fatigue models are compared. The monograph also demonstrates how the results of acoustic emission and of microscopy studies reveal the microscopic origins of fatigue in ferroelectric devices.
Download or read book Experimental studies on crack growth in ferroelectric ceramics written by Andrea Raphaela Engert and published by Cuvillier Verlag. This book was released on 2013-07-17 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: This experimental work seeks to add to the understanding of fracture of ferroelectric ceramics. R-curve measurements with additional electrical loads show that AC electrical loading causes a drop in the critical mechanical load. The surface potential distribution around a stationary crack under various electromechanical loading conditions, measured with Kelvin Force Microscopy, is used to determine an effective dielectric constant of the crack, which is shown to depend on the distance from the crack tip, the electric and mechanical load and which changes with time and successive loading cycles. Experimentelle Untersuchungen zum Bruchverhalten von ferroelektrischen Keramiken. Risswiderstands-Kurven (R-Kurven) zur Untersuchung von Risswachstum bei verschiedenen kombinierten elektromechanischen Lasten zeigen, dass eine elektrische Wechsellast die kritische mechanische Last verringert. Untersuchungen des Oberflächenpotentials um ruhende durchgehende Risse mittels Kelvin Force Microscopy (KFM) und die Ableitung der effektiven Dielektrizitätskonstanten zur Beschreibung des dielektrische Verhaltens des Risses zeigen, dass letztere vom Abstand zur Rissspitze, von der elektromechanischen Last abhängt und sich mit der Zeit und mit zunehmenden Lastzyklen verändert.
Download or read book IUTAM Symposium on Mechanics and Reliability of Actuating Materials written by W. Yang and published by Springer Science & Business Media. This book was released on 2006-06-28 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: Actuating materials hold a promise for fast-spreading applications in smart structures and active control systems, and have attracted extensive attention from scientists of both mechanics and materials sciences communities. High performance and stability of actuating materials and structures play a decisive role in their successive applications as sensors and actuators in structural control and robotics. The advances of actuating materials, however, recently encountered a severe reliability issue. For a better understanding toward this issue, scientific efforts are of paramount significance to gain a deep insight into the intricate deformation and failure behaviors of actuating materials. To examine the state of the art in this subject, the general assembly of IUTAM approved in August, 2002 at Cambridge University, UK, a proposal to hold an IUTAM symposium to summarize the relevant research findings. The main themes of the symposium are: (i) the constitutive relations of actuating materials that couple mechanical, electrical, thermal and magnetic properties, as well as incorporate phase transformation and domain switch; (ii) the physical mechanisms of deformation, damage, and fatigue crack growth of actuating materials; (iii) the development of failure-resilient approaches that base on the macro-, meso-, and micro-mechanics analyses; (iv) the investigation of microstructural evolution, stability of phase transformation, and size effects of ferroelectric ceramics, shape memory alloys, actuating polymers, and bio-actuating materials. The above problems represent an exciting challenge and form a research thrust of both materials science and solid mechanics. The IUTAM Symposium (GA.
Download or read book Synthesis Properties and Crystal Chemistry of Perovskite Based Materials written by Winnie Wong-Ng and published by John Wiley & Sons. This book was released on 2012-04-11 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: The number of ceramic materials with a perovskite type structure islarge and of considerable technological importance due to theirrich crystal chemistry and structure-property relationships.Applications include multilayer capacitators, piezoelectrictransducers, PTC thermistors, electrooptical modulators, opticalswitches, dielectric resonators, thick film resistors, electronicsensors, electrorestrictive actuators, magnetic bubble memorydevices, laser host materials, ferromagnetic materials, refractoryelectrodes, second harmonic generators, batteries, ceramicelectrodes, thermoelectric devices, and high temperaturesuperconductors. This volume contains papers on the research and development of newperovskite materials for various applications including doping ofexisting perovskite materials as well as processing for improvedproperties.
Download or read book Mechatronic Reliability written by Wei Yang and published by Springer Science & Business Media. This book was released on 2003-01-13 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first mechatronics book dealing with coupled mechanical and electrical actions, an emerging branch of modern technology. Authored by the leading scientist in this field, the book treats various subjects along the interface between mechanics and electronics.
Download or read book IUTAM Symposium on Multiscale Modelling of Fatigue Damage and Fracture in Smart Materials written by Meinhard Kuna and published by Springer Science & Business Media. This book was released on 2010-11-12 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, multi-functional materials such as piezoelectric/ferroelectric ceramics, magneto-strictive and shape memory alloys are gaining increasing applications as sensors, actuators or smart composite materials systems for emerging high tech areas. The stable performance and reliability of these smart components under complex service loads is of paramount practical importance. However, most multi-functional materials suffer from various mechanical and/or electro-magnetical degra-dation mechanisms as fatigue, damage and fracture. Therefore, this exciting topic has become a challenge to intensive international research, provoking the interdisciplinary approach between solid mechanics, materials science and physics. This book summarizes the outcome of the above mentioned IUTAM-symposium, assembling contributions by leading scientists in this area. Particularly, the following topics have been addressed: (1) Development of computational methods for coupled electromechanical field analysis, especially extended, adaptive and multi-level finite elements. (2) Constitutive modeling of non-linear smart material behavior with coupled electric, magnetic, thermal and mechanical fields, primarily based on micro-mechanical models. (3) Investigations of fracture and fatigue in piezoelectric and ferroelectric ceramics by means of process zone modeling, phase field simulation and configurational mechanics. (4) Reliability and durability of sensors and actuators under in service loading by alternating mechanical, electrical and thermal fields. (5) Experimental methods to measure fracture strength and to investigate fatigue crack growth in ferroelectric materials under electromechanical loading. (6) New ferroelectric materials, compounds and composites with enhanced strain capabilities.
Download or read book Fracture Mechanics of Ceramics written by R.C. Bradt and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: Second part of the proceedings of the Sixth International Symposium held in Karlsruhe, Germany, July 18-20, 1995.
Download or read book Advances in Fracture and Materials Behavior written by Wei Yang and published by Trans Tech Publications Ltd. This book was released on 2008-03-07 with total page 1554 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work on the fracture, fatigue and strength of materials comprises 238 peer-reviewed papers covering new ideas and up-to-date results. It is anticipated that this special volume will stimulate and enhance progress in fracture mechanics, materials behavior and computational science research, as well as advancing fundamental understanding in these fields. Volume is indexed by Thomson Reuters CPCI-S (WoS).
Download or read book Comprehensive Structural Integrity written by Ian Milne and published by Elsevier. This book was released on 2003-07-25 with total page 4647 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this major reference work is to provide a first point of entry to the literature for the researchers in any field relating to structural integrity in the form of a definitive research/reference tool which links the various sub-disciplines that comprise the whole of structural integrity. Special emphasis will be given to the interaction between mechanics and materials and structural integrity applications. Because of the interdisciplinary and applied nature of the work, it will be of interest to mechanical engineers and materials scientists from both academic and industrial backgrounds including bioengineering, interface engineering and nanotechnology. The scope of this work encompasses, but is not restricted to: fracture mechanics, fatigue, creep, materials, dynamics, environmental degradation, numerical methods, failure mechanisms and damage mechanics, interfacial fracture and nano-technology, structural analysis, surface behaviour and heart valves. The structures under consideration include: pressure vessels and piping, off-shore structures, gas installations and pipelines, chemical plants, aircraft, railways, bridges, plates and shells, electronic circuits, interfaces, nanotechnology, artificial organs, biomaterial prostheses, cast structures, mining... and more. Case studies will form an integral part of the work.
Download or read book Special Topics in the Theory of Piezoelectricity written by Jiashi Yang and published by Springer Science & Business Media. This book was released on 2010-06-08 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Piezoelectricity has been a steadily growing field, with recent advances made by researchers from applied physics, acoustics, materials science, and engineering. This collective work presents a comprehensive treatment of selected advanced topics in the subject. The book is written for an intermediate graduate level and is intended for researchers, mechanical engineers, and applied mathematicians interested in the advances and new applications in piezoelectricity.
Download or read book Fatigue in Ferroelectric Ceramics and Related Issues written by Doru Constantin Lupascu and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major barrier to the introduction of ferroelectric devices into mass markets remains their limited reliability due to fatigue. The underlying physical and chemical mechanisms of this material fatigue phenomenon are extremely complex, and the relevant influences range from single-point defects to macroscopic boundary conditions. This book summarizes the different aspects of fatigue in ferroelectrics. It is primarily concerned with bulk material effects. Mechanical, electrical, and physico-chemical processes are described; reference data are given for different loading regimes and boundary conditions; and various fatigue models are compared. The monograph also demonstrates how the results of acoustic emission and of microscopy studies reveal the microscopic origins of fatigue in ferroelectric devices.
Download or read book The Effect of Electric Fields on the Subcritical Crack Propagation in Selected Dielectric Glasses and Ceramics written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effects of electrical fields on cracking behavior of ceramics were examined in four different ceramics, namely, glass, magnesium oxide (MgO), lead zirconate titanate (PZT) and lead lanthanum zirconate titanate (PLZT). When the electrical field was non-orthogonal to the crack plane, deflection of microcracks occurred. The deflection angle was as high as 90 degrees from the original crack-plane, depending on the relative orientation of the electrical field to the crack plane. In piezoelectric ceramics, crack growth was observed under both DC and AC electric fields. The crack growth under AC electric fields was a strong function of the mean electrical field. Micromechanisms of cracking were examined by a new in-situ transmission electron microscopy technique, developed for observations of electric-field induced cracking in ferroelectric ceramics. With this technique, cracking of the domain boundary under both static and alternating electric field was directly observed for the first time in PMN-PT crystals and in a commercial EC65 PZT ceramic. Domain alignments and switching were also directly imaged near crack-like flaws.
Download or read book Advances in Applied Mechanics written by Erik van der Giessen and published by Academic Press. This book was released on 2001-09-28 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanics is defined as a branch of physics that focuses on motion and the reaction of physical systems to internal and external forces. This highly acclaimed series provides survey articles on the present state and future direction of research in important branches of applied solid and fluid mechanics.
Download or read book Multifunctional Polycrystalline Ferroelectric Materials written by Lorena Pardo and published by Springer Science & Business Media. This book was released on 2011-02-14 with total page 847 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents selected topics on processing and properties of ferroelectric materials that are currently the focus of attention in scientific and technical research. Ferro-piezoelectric ceramics are key materials in devices for many applications, such as automotive, healthcare and non-destructive testing. As they are polycrystalline, non-centrosymmetric materials, their piezoelectricity is induced by the so-called poling process. This is based on the principle of polarization reversal by the action of an electric field that characterizes the ferroelectric materials. This book was born with the aim of increasing the awareness of the multifunctionality of ferroelectric materials among different communities, such as researchers, electronic engineers, end-users and manufacturers, working on and with ferro-piezoelectric ceramic materials and devices which are based on them. The initiative to write this book comes from a well-established group of researchers at the Laboratories of Ferroelectric Materials, Materials Science Institute of Madrid (ICMM-CSIC). This group has been working in different areas concerning thin films and bulk ceramic materials since the mid-1980s. It is a partner of the Network of Excellence on Multifunctional and Integrated Piezoelectric Devices (MIND) of the EC, in which the European Institute of Piezoelectric Materials and Devices has its origin.
Download or read book Electromagneto Mechanics of Material Systems and Structures written by Yasuhide Shindo and published by John Wiley & Sons. This book was released on 2016-05-03 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electromagneto-Mechanics of Material Systems and Structures Electromagneto-Mechanics of Material Systems and Structures Written by a leading expert, this book is a comprehensive introduction to the fundamentals and the state of the art in the electromagneto-mechanics of adaptive materials. Its varied topic range includes an overview on how electric, magnetic, and deformation fields interact with each other in the presence of advanced materials systems, such as electric conductors, dielectrics, ferromagnets, among others. Within this context, the author considers for each material system specific phenomena like vibrations, wave propagation, fracture, and fatigue. Readers will also gain a thorough understanding of applications in the electronics and nuclear energy industries, as well as in smart materials and MEMS. Covers a wide and varied range of subject areas, spanning theoretical, experimental, computational studies as well as industrial applications Features extensive applications in the electronics, nuclear engineering, smart materials and MEMS industries Takes the reader from fundamental concepts, applied research, applications through to emerging technologies Electromagneto-Mechanics of Material Systems and Structures is an all-in-one reference for advanced/graduate students in mechanical and electrical engineering, as well as materials science. It also serves as a handy refresher guide for engineers in related areas such as aeronautical and civil engineering.
Download or read book Handbook of Advanced Ceramics written by Tatsuki Ohji and published by Elsevier Inc. Chapters. This book was released on 2013-04-11 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
