Download or read book Evaluation of the Blind Hole Drilling Method for the Measurement of Residual Stress written by C. S. Dentry and published by . This book was released on 1984 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The blind hole drilling method has been employed to measure uniform residual stress fields; and an evaluation made of one approach to using this method when the stress field varies with depth. In particular stress fields generated by the application of uniaxial loads, by shot-peening and by heat treatment have been evaluated. The technique has been applied to the measurement of the residual stress field in the tyre bead seat region of a Boeing 727 main undercarriage wheel. This region has been found to have a significant level of residual stress perhaps indicative of the action of surface rolling.
Download or read book Hole Drilling Method for Measuring Residual Stresses written by Gary S. and published by Springer Nature. This book was released on 2022-05-31 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the theory and practice of the Hole-Drilling Method for measuring residual stresses in engineering components. Such measurements are important because residual stresses have a "hidden" character because they exist locked-in within a material, independent of any external load. These stresses are typically created during component manufacture, for example, during welding, casting, or forming. Because of their hidden nature, residual stresses are difficult to measure and consequently are often ignored. However, they directly add to loading stresses and can cause catastrophic failure if not properly included during engineering design. Thus, there is an urgent need to be able to identify and measure residual stresses conveniently and reliably. The Hole-Drilling Method provides an adaptable and well-proven method for measuring residual stresses in a wide range of materials and component types. It is convenient to use and gives reliable results. Because of the hidden nature of residual stresses, the measurement method must necessarily be indirect, thus, additional care and conceptual understanding are necessary to achieve successful results. This book provides a practical introduction to the Hole-Drilling Method, starting from its historical roots and going on to focus on its modern practice. The various chapters describe the nature of residual stresses, the principle of hole-drilling measurements, procedures and guidance on how to make successful measurements, and effective mathematical procedures for stress computation and analysis. The book is intended for practitioners who need to make residual stress measurements either occasionally or routinely, for practicing engineers, for researchers, and for graduate engineering and science students.
Download or read book Residual stress analysis in polymer materials using the hole drilling method basic principles and applications written by Arnaud Magnier and published by kassel university press GmbH. This book was released on 2018-12-17 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of plastic effects in residual stress measurement by the hole drilling technique written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Uma das técnicas mais aplicadas para medir tensões residuais em componentes mecânicos é a técnica do furo cego. Esta técnica é de fácil aplicação industrial e énormalizada pela ASTM E 837. Entretanto, devido à concentração de tensões gerada pelo furo, há restrições quanto à aplicação deste método quando as tensõesresiduais presentes excedem 0.3 da tensão de escoamento do material, Sy. Há na literatura trabalhos que avaliam, por elementos finitos, os erros gerados ao seaplicar diretamente estes coeficientes em componentes com altos níveis de tensões residuais. Em alguns casos, o erro pode chegar a 140%, para tensões da ordem de0.9 de Sy. Porém, para retrocalcular as tensões residuais estes trabalhos também usam hipóteses válidas apenas no regime elástico, de forma que os resultados poreles apresentados podem ter imprecisões. Neste trabalho propõem-se novas metodologias numéricas para avaliar a validade da norma ASTM E 837 em regime plástico, através de uma modelagem mais realística do alívio de tensãogerado pela usinagem do furo, evitando o uso de hipóteses linear-elásticas. Estas metodologias são: Estado Equivalente, na qual uma tensão equivalente àquelaagindo no componente é aplicada na borda do furo; metodologia Morte de Elementos na qual os elementos presentes na região em que o furo será usinadosão eliminados numericamente em vários passos, de forma a simular o processo de usinagem; e a metodologia Tensão Substituta, na qual o material presente naregião do furo é substituído pela tensão que nele age, a qual é retirada gradativamente. Foram modeladas em elementos finitos placas com furos passantes e cegos, submetidas a carregamentos uniaxiais e biaxiais, desde 0.3 Sy até 0.9 Sy. Além disso, foram utilizados nas simulações materiais tendo limite elástico e de escoamento coincidentes e não coincidentes. Os erros encontradosentre as tensões retrocalculadas e as tensões aplicadas, para todas as situações são menores que encontrados por outros pesquisadores, obtendo-se no pior caso 70%. Finalmente, conclui-se que as metodologias Tensão Substituta e Morte de Elementos são as que simulam de forma mais próxima da realidade o processo de usinagem de um furo em um placa submetida à altas tensões.
Download or read book A Contribution to Enlarge the Application Limits of Residual Stress Analyses by the Hole Drilling and the Ring Core Method written by Andreas Nau and published by kassel university press GmbH. This book was released on 2016-01-01 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Residual Stress Analysis of Components with Real Geometries Using the Incremental Hole Drilling Technique and a Differential Evaluation Method written by Enrique Garcia Sobolevski and published by kassel university press GmbH. This book was released on 2007 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASTM E837 20 written by and published by . This book was released on 2020 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Residual Stresses in Composite Materials written by Mahmood M. Shokrieh and published by Woodhead Publishing. This book was released on 2014-02-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: Residual stresses are a common phenomenon in composite materials. They can either add to or significantly reduce material strength. Because of the increasing demand for high-strength, light-weight materials such as composites and their wide range of applications in the aerospace and automotive industries, in civil infrastructure and in sporting applications, it is critical that the residual stresses of composite materials are understood and measured correctly. The first part of this important book reviews destructive and non-destructive testing (NDT) techniques for measuring residual stresses. Various mathematical (analytical and numerical) methods for calculation of residual stresses in composite materials are also presented. Chapters in the first section of the book discuss the simulated hole drilling method, the slitting/crack compliance method, measuring residual stresses in homogeneous and composite glass materials using photoelastic techniques, and modeling residual stresses in composite materials. The second part of the book discusses residual stresses in polymer matrix, metal-matrix and a range of other types of composites. Moreover, the addition of nanoparticles to the matrix of polymeric composites as a new technique for reduction of residual stresses is discussed. Residual stresses in composite materials provides a comprehensive overview of this important topic, and is an invaluable reference text for both academics and professionals working in the mechanical engineering, civil engineering, aerospace, automotive, marine and sporting industries. Reviews destructive and non-destructive testing (NDT) techniques for measuring residual stresses Discusses residual stresses in polymer matrix, metal-matrix and other types of composite Considers the addition of nanoparticles to the matrix of polymeric composites as a new technique for reduction of residual stresses
Download or read book Development of Digital Image Correlation Technique Applied to Hole Drilling Residual Stress Measurement written by and published by . This book was released on 2015 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: The residual stresses found in components are mainly due to thermal, mechanical and metallurgical changes of material. The manufacturing processes such as fabrication, assembly, welding, rolling, heat treatment, shot peening etc. generate residual stresses in material. A significant number of improvements for residual stress measurement techniques have occurred in last few decades. The needs of Digital Image Correlation (DIC) techniques from industry have been increasing, especially in micro- and nano-scale mechanical testing applications mainly due to its relative easy implementation and utilization. In this dissertation, new experimental and numerical methods have been carried out, using a 3D-DIC measurement system with hole drilling operations and Finite Element Analysis (FEA) models to successfully predict both uniform and non-uniform residual stresses in material. The residual stresses have been calculated based on the established governing equations, 3D-DIC measured deformations, and calibration coefficients determined by finite element analyses. This 3D-DIC measurement technique performed in a no contact approach can capture the full-field, high sensitivity and high accuracy in-plan and out-of-plan deformation simultaneously. it can be used for both industrial and lab environments. There are three main categories for residual stress evaluations and validations in this dissertation. They are listed as following: 1) Through hole drilling (THD) on thin parts for uniform residual stresses; 2) Blind hole drilling (BHD) on thick parts for uniform residual tresses, where it is not possible to drill a through hole; 3) Incremental blind hole drilling (IBHD) on thick parts for non-uniform residual stresses which vary as a function of depth.
Download or read book Practical Residual Stress Measurement Methods written by Gary S. Schajer and published by John Wiley & Sons. This book was released on 2013-08-01 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: An introductory and intermediate level handbook written in pragmatic style to explain residual stresses and to provide straightforward guidance about practical measurement methods. Residual stresses play major roles in engineering structures, with highly beneficial effects when designed well, and catastrophic effects when ignored. With ever-increasing concern for product performance and reliability, there is an urgent need for a renewed assessment of traditional and modern measurement techniques. Success critically depends on being able to make the most practical and effective choice of measurement method for a given application. Practical Residual Stress Measurement Methods provides the reader with the information needed to understand key residual stress concepts and to make informed technical decisions about optimal choice of measurement technique. Each chapter, written by invited specialists, follows a focused and pragmatic format, with subsections describing the measurement principle, residual stress evaluation, practical measurement procedures, example applications, references and further reading. The chapter authors represent both international academia and industry. Each of them brings to their writing substantial hands-on experience and expertise in their chosen field. Fully illustrated throughout, the book provides a much-needed practical approach to residual stress measurements. The material presented is essential reading for industrial practitioners, academic researchers and interested students. Key features: • Presents an overview of the principal residual stress measurement methods, both destructive and non-destructive, with coverage of new techniques and modern enhancements of established techniques • Includes stand-alone chapters, each with its own figures, tables and list of references, and written by an invited team of international specialists
Download or read book Residual Stresses 2016 written by Thomas M. Holden and published by Materials Research Forum LLC. This book was released on 2017-03-15 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the proceedings of the International Conference on Residual Stresses 10 and is devoted to the prediction/modelling, evaluation, control, and application of residual stresses in engineering materials. New developments, on stress-measurement techniques, on modelling and prediction of residual stresses and on progress made in the fundamental understanding of the relation between the state of residual stress and the material properties, are highlighted. The proceedings offer an overview of the current understanding of the role of residual stresses in materials used in wide ranging application areas.
Download or read book International Conference on Residual Stresses written by G. Beck and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1043 pages. Available in PDF, EPUB and Kindle. Book excerpt: Residual stresses are always introduced in materials when they are produced, or when they undergo non-uniform plastic deformation during use. The circumstances that can cause residual stresses are therefore numerous. Residual stresses exist in all materials and, depending on their distribution, can playa beneficial role (for example, compressive surface stress) or have a catastrophic effect, especially on fatigue behaviour and corrosion properties. The subject of residual stresses took form around 1970 with the development of methods to measure macroscopic deformations during the machining of materials or on an atomic scale by X-ray diffraction. These techniques have made considerable progress in the last 20 years. The meetings organized in several countries (Germany, France, Japan, etc. ) have largely contributed to this progress, aided by the numerous exchanges of information and knowledge to which they have given rise. Studies of the formation of residual stresses began more slowly, but have progressed with the emergence of increasingly realistic models of materials behaviour and with access to ever more powerful codes for numerical calculations. Two successive meetings for discussing this topic have been held in Europe. The first, held in 1982 in Nancy (France), consisted of 30 participants from 5 countries. The second was held in Linkoping (Sweden) in 1984, with 80 participants of 16 nationalities. It was decided to hold a first International Conference, ICRS, to address all aspects of the problem. Held in 1986 in Garmisch-Partenkirschen (FRG), it was an assembly of neady 300 participants from 21 countries.
Download or read book Handbook of Residual Stress and Deformation of Steel written by George E. Totten and published by ASM International. This book was released on 2002 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Examines the factors that contribute to overall steel deformation problems. The 27 articles address the effect of materials and processing, the measurement and prediction of residual stress and distortion, and residual stress formation in the shaping of materials, during hardening processes, and during manufacturing processes. Some of the topics are the stability and relaxation behavior of macro and micro residual stresses, stress determination in coatings, the effects of process equipment design, the application of metallo- thermo-mechanic to quenching, inducing compressive stresses through controlled shot peening, and the origin and assessment of residual stresses during welding and brazing. Annotation c. Book News, Inc., Portland, OR (booknews.com)
Download or read book New Challenges in Residual Stress Measurements and Evaluation written by Caterina Casavola and published by BoD – Books on Demand. This book was released on 2020-07-22 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Residual stresses (RS) are stresses present inside materials even in the absence of any applied load. They are of capital importance because they can impact greatly on the mechanical strength of the material, on its dimensional correspondence to design specifications as well as on the fatigue life of the part. RS measurement and evaluation is currently an important research topic where a lot of challenges still need to be addressed. This book aims to provide the reader with an overview of the principal novelties in this field including current limitations and potential future developments. Both radically new experimental approaches as well as recent evolutions of consolidated ones will be presented, along with the latest novelties in the area of numerical residual stress evaluation.
Download or read book Residual Stresses written by A. Niku-Lari and published by Elsevier. This book was released on 2014-05-17 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: Residual Stresses presents a collection of articles that provides information regarding the use of surface treatment systems. It discusses the developments in the technology and application of surface treatment. It addresses the influence of minor stresses on the performance of materials. Some of the topics covered in the book are the introduction to self-equilibrating stresses existing in materials, the stresses that form as a consequence of welding, the stresses made by machining, and the mechanical generation of self-stresses. The analysis of the stresses caused by thermal and thermochemical surface treatments is covered. The minor stresses in composite materials are discussed. The text describes the stresses in uranium and uranium alloys. The Trepan or ring core method, centre-hole method, and Sach's method are presented. A chapter of the volume is devoted to the measurement of residual stresses. Another section of the book focuses on the application of shot peened plates to residual stress distribution. The book will provide useful information to mechanics, engineers, students, and researchers.
Download or read book Residual Stresses 2018 written by Marc Seefeldt and published by Materials Research Forum LLC. This book was released on 2018-10-10 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: The European Conference on Residual Stresses (ECRS) series is the leading European forum for scientific exchange on internal and residual stresses in materials. It addresses both academic and industrial experts and covers a broad gamut of stress-related topics from instrumentation via experimental and modelling methodology up to stress problems in specific processes such as welding or shot-peening, and their impact on materials properties. Chapters: Diffraction Methods; Mechanical Relaxation Methods; Acoustic and Electromagnetic Methods; Composites, Nano and Microstructures; Films, Coatings and Oxides; Cold Working and Machining; Heat Treatments and Phase Transformations; Welding, Fatigue and Fracture: Stresses in Additive Manufacturing.
Download or read book Feasibility Study and Evaluation of Applying EDM Hole Drilling Method for Measuring Residual Stress written by 許富銓 and published by . This book was released on 2005 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
