Download or read book An Investigation Into the Unloading Forces of Superelastic Nickel Titanium Coil Springs written by Adam Anthony Ryan and published by . This book was released on 1993 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Mechanical Property Study of Superelastic Nickel titanium Alloy Closed and Open Coil Springs written by Erik Walter Hrabowy and published by . This book was released on 1993 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Force Characteristics of Nickel titanium Open coil Springs written by Allyson Bourke and published by . This book was released on 2007 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objective. The objective of this study was to quantify the properties of 11 commercially available nickel-titanium open-coil springs.Methods. An Instron universal testing machine was used to measure the force generated when open-coil springs were compressed to one-half their original length and then unloaded. Eleven springs from 3 different manufacturers were tested at 5 testing sessions over a 12-week period.Results. The average forces generated at the initial recording session for uniformly wound springs from GAC International and 3M Unitek(TM) were 19.3-42.7% and 9.7-38.8% below the manufacturers labeled force levels, respectively. GAC International 100g, 150g and 200g stop-wound coils demonstrated stepwise statistically and clinically significant force degradation over the 12-week period (p
Download or read book Force Characteristics of Nickel Titanium Closed Coil Springs written by Wilbur Lynn Chow and published by . This book was released on 2006 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Four properties of nickel titanium closed coil springs were investigated: mean force, maximum force, load/deflection ratio and force degradation over 16 weeks. The force exerted by 150, 200 and 250g springs from three manufacturers (GAC SentalloyeRTM; TP ReflexRTM; Unitek(TM) Nitinol) was recorded throughout their respective published activation ranges. Twenty springs of each nominal force level were tested. The mean initial force of the GAC and Unitek(TM) springs was 6--8% and 23--36% below their nominal force, respectively. The mean initial force of the TP springs was 1--24% above their labeled force. The maximum force of the GAC and TP springs was 53--130% greater than the labeled force, whereas the Unitek(TM) springs exhibited maximum forces within 11% of their nominal values. Unitek(TM) springs generated the lowest load/deflection ratios, which best approximates constant force delivery. Only the GAC 150g springs demonstrated both statistically and clinically significant force degradation.
Download or read book Nickel Titanium Materials written by Yoshiki Oshida and published by Walter de Gruyter GmbH & Co KG. This book was released on 2020-08-24 with total page 1046 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nickel-Titanium alloys are smart materials exhibiting unique properties such as superelasticity and shape-memory effect. The material has been used as orthodontic wires in the dental field for over 20 years. This book is a comprehensive overview to the field of Ni-Ti Materials and the physical, chemical and mechanical properties of this versatile alloy. In addition, complications and challenges exhibited in applications are also discussed.
Download or read book In Vivo Comparison Between Interarch Elastics and Closed Coil Springs for Correction of Overjet in Class II Malocclusions written by Michele Jacqueline Wang and published by . This book was released on 1996 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of Shape Memory Alloy SMA Actuators written by Ashwin Rao and published by Springer. This book was released on 2015-05-08 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: This short monograph presents an analysis and design methodology for shape memory alloy (SMA) components such as wires, beams, and springs for different applications. The solid-solid, diffusionless phase transformations in thermally responsive SMA allows them to demonstrate unique characteristics like superelasticity and shape memory effects. The combined sensing and actuating capabilities of such materials allows them to provide a system level response by combining multiple functions in a single material system. In SMA, the combined mechanical and thermal loading effects influence the functionality of such materials. The aim of this book is to make the analysis of these materials accessible to designers by developing a "strength of materials" approach to the analysis and design of such SMA components inspired from their various applications with a review of various factors influencing the design process for such materials.
Download or read book Orthodontic Materials written by Wiliam A. Brantley and published by Thieme. This book was released on 2011-01-01 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this important new textbook all scientific and clinical aspects of orthodontic materials are described.Recent developments in science and technology have led to the introduction of a plethora of new orthodontic products. This work serves as an excellent source of information for a field that requires knowledge of basic elements of materials science, engineering, chemistry, and physics, as well as clinical orthodontics. The subject has been part of graduate orthodontic education for almost three decades. Besides servicing the orthodontic training programs, the book also - investigates the interactions of orthodontic materials with other dental materials as well as hard tissues in the oral cavity,- gives a background to allow for proper material selection for efficient orthodontic mechanics,- treats the issues of biocompatibility, cytotoxicity and mutagenicity of materials.
Download or read book Orthodontic Applications of Biomaterials written by Theodore Eliades and published by Woodhead Publishing. This book was released on 2016-11-22 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Orthodontic Applications of Biomaterials: A Clinical Guide reviews the applications of biomaterials and their effects on enamel preparation, bonding, bracket and archwire ligation, mechanotherapy, debonding, and long-term enamel structural, color, and surface effects. The book provides a step-by-step analysis of the phenomena occurring, their clinical importance, and their underlying cause without the use of complex mathematical or physical-chemical analyses, with the goal of providing 'digestible' evidence for the clinician. - Serves as a reference source of the spectrum of biomaterials used in orthodontics - Presents the most current evidence of state-of-the-art methods of materials research - Provides substantiation for the effects occurring during the materials' uses
Download or read book Shape Memory Implants written by L. Yahia and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape memory alloy implants or "smart biomaterial" have already been used in humans for 20 years in selected countries. Restrictions in the use of biomaterials in living organisms being reduced throughout the world now the use of SMA implants continue to expand in the fields of vascular and orthopaedic surgery, minimally invasive surgery and drug delivery systems. This book is to provide a state of the art of SMA implants and devices. For the first time long-term clinical experiences and techniques of SMA biocompatibility are presented.
Download or read book Shape Memory Alloys for Biomedical Applications written by T Yoneyama and published by Elsevier. This book was released on 2008-11-21 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape memory alloys are suitable for a wide range of biomedical applications, such as dentistry, bone repair and cardiovascular stents. Shape memory alloys for biomedical applications provides a comprehensive review of the use of shape memory alloys in these and other areas of medicine.Part one discusses fundamental issues with chapters on such topics as mechanical properties, fabrication of materials, the shape memory effect, superelasticity, surface modification and biocompatibility. Part two covers applications of shape memory alloys in areas such as stents and orthodontic devices as well as other applications in the medical and dental fields.With its distinguished editors and international team of contributors, Shape memory alloys for biomedical applications is an essential reference for materials scientists and engineers working in the medical devices industry and in academia. - A comprehensive review of shape memory metals and devices for medical applications - Discusses materials, mechanical properties, surface modification and biocompatibility - Chapters review medical and dental devices using shape memory metals, including stents and orthodontic devices
Download or read book Materials for Springs written by and published by Springer Science & Business Media. This book was released on 2007-09-06 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Materials for springs" is basically intended for engineers related to spring materials and technologies who graduated from metallurgical or mechanical engineering course in technical high school, or in other higher engineering schools, as well as those who are related to purchases or sales of spring materials. This book is the first comprehensive treatment in this specific topic. It is written by experts of the JSSE (Japan Society of Spring Engineers).
Download or read book Shape Memory Alloys Handbook written by Christian Lexcellent and published by John Wiley & Sons. This book was released on 2013-04-08 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to understand and describe the martensitic phase transformation and the process of martensite platelet reorientation. These two key elements enable the author to introduce the main features associated with the behavior of shape-memory alloys (SMAs), i.e. the one-way shape-memory effect, pseudo-elasticity, training and recovery. Attention is paid in particular to the thermodynamical frame for solid materials modeling at the macroscopic scale and its applications, as well as to the particular use of such alloys – the simplified calculations for the bending of bars and their torsion. Other chapters are devoted to key topics such as the use of the “crystallographical theory of martensite” for SMA modeling, phenomenological and statistical investigations of SMAs, magneto-thermo-mechanical behavior of magnetic SMAs and the fracture mechanics of SMAs. Case studies are provided on the dimensioning of SMA elements offering the reader an additional useful framework on the subject. Contents 1. Some General Points about SMAs. 2. The World of Shape-memory Alloys. 3. Martensitic Transformation. 4. Thermodynamic Framework for the Modeling of Solid Materials. 5. Use of the “CTM” to Model SMAs. 6. Phenomenological and Statistical Approaches for SMAs. 7. Macroscopic Models with Internal Variables. 8. Design of SMA Elements: Case Studies. 9. Behavior of Magnetic SMAs. 10. Fracture Mechanics of SMAs. 11. General Conclusion. Appendix 1. Intrinsic Properties of Rotation Matrices. Appendix 2. “Twinning Equation” Demonstration. Appendix 3. Calculation of the Parameters a, n and Q from the “Twinning” Equation. Appendix 4. “Twinned” Austenite/Martensite Equation. About the Authors Christian Lexcellent is Emeritus Professor at the École National Supérieure de Mécanique et des Microtechniques de Besançon and a researcher in the Department of Applied Mechanics at FEMTO-ST in France. He is a specialist in the mechanics of materials and phase transition and has taught in the subjects of mechanics of continuum media and shape memory alloys. He is also a member of the International Committee of ESOMAT.
Download or read book Orthodontic Diagnosis written by Thomas Rakosi and published by Thieme. This book was released on 1993 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: An illustrated guide for the complex process of orthodontic diagnostics and indication. The total process of treatment planning including the scientific bases is pictorially described. Beside the conventional methods of examination and model analysis, emphasis is placed on the cranio-facial growth processes, the aetiology of malocclusions and on the importance of functional analysis. The following three aspects are described in detail in this book: Growth of the Facial Skeleton - types of treatment which promote or guide growth. In order to control these natural processes artificially, a precise understanding of them is required. Aetiology of the Malocclusion - the various types of causative therapy and the elimination of the causes. Functional Analysis - many malocclusions are a result of dysfunctions. As a variety of methods are available for treating dysfunctions, functional analysis is taken very seriously.
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polyurethane Shape Memory Polymers written by W.M. Huang and published by CRC Press. This book was released on 2011-09-08 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape memory polymers (SMPs) are some of the most important and valuable engineering materials developed in the last 25 years. These fascinating materials demonstrate remarkably versatile properties-including capacity for actuation and stimulus responsiveness-that are enabling technologists to develop applications used to explore everything from th
Download or read book Engineering Aspects of Shape Memory Alloys written by T W Duerig and published by Butterworth-Heinemann. This book was released on 2013-10-22 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Engineering Aspects of Shape Memory Alloys provides an understanding of shape memory by defining terms, properties, and applications. It includes tutorials, overviews, and specific design examples—all written with the intention of minimizing the science and maximizing the engineering aspects. Although the individual chapters have been written by many different authors, each one of the best in their fields, the overall tone and intent of the book is not that of a proceedings, but that of a textbook. The book consists of five parts. Part I deals with the mechanism of shape memory and the alloys that exhibit the effect. It also defines many essential terms that will be used in later parts. Part II deals primarily with constrained recovery, but to some extent with free recovery. There is an introductory paper which defines terms and principles, then several specific examples of products based on constrained recovery. Both Parts III and IV deal with actuators. Part III introduces engineering principles while Part IV presents several of the specific examples. Finally, Part V deals with superelasticity, with an introductory paper and then several specific examples of product engineering.
