A Summary Of The Theory Of Fracture In Metals

Author : J. W. Spretnak
Publisher : Unknown
Page : 78 pages
File Size : 55,7 Mb
Release : 1961
Category : Deformations (Mechanics)
ISBN : OSU:32435016180549

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A Summary of the Theory of Fracture in Metals by J. W. Spretnak Pdf

The theoretical strength of metals, bas d on atomic forces, is in the order of 100 to 1000 greater than that observed. Reasons for this discrepancy are discussed in detail, but the more important ones are (1) lattice imperfections, (2) the fact th t real metals ar polycrystalline aggregates, (3) crystalline anisotropy, and (4) the ability of metals to deform by shear. Plastic flow, particularly heterogeneous plastic flow, is intimately associated with crack initiation. The precise conditions under which plastic flow c ase and bond rupturing (cracking begins are not completely understood. The body-centered cubic lattice has geometric characteristics that make it particularly susceptible to fracture with little or no preceding plastic flow. Multidirectional stress fields, both microscopic and macroscopic, affect the degree of plastic deformation that precedes crack initiation. The theory of fracture as it exists oday is reviewed. (Author).

Author : J. W. Spretnak
Publisher : Unknown
Page : 70 pages
File Size : 53,6 Mb
Release : 1961
Category : Deformations (Mechanics)
ISBN : UOM:39015095151307

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A Summary of the Theory of Fracture in Metals by J. W. Spretnak Pdf

The theoretical strength of metals, bas d on atomic forces, is in the order of 100 to 1000 greater than that observed. Reasons for this discrepancy are discussed in detail, but the more important ones are (1) lattice imperfections, (2) the fact th t real metals ar polycrystalline aggregates, (3) crystalline anisotropy, and (4) the ability of metals to deform by shear. Plastic flow, particularly heterogeneous plastic flow, is intimately associated with crack initiation. The precise conditions under which plastic flow c ase and bond rupturing (cracking begins are not completely understood. The body-centered cubic lattice has geometric characteristics that make it particularly susceptible to fracture with little or no preceding plastic flow. Multidirectional stress fields, both microscopic and macroscopic, affect the degree of plastic deformation that precedes crack initiation. The theory of fracture as it exists oday is reviewed. (Author).

Author : Stephen W. Freiman,John J. Mecholsky, Jr.
Publisher : John Wiley & Sons
Page : 197 pages
File Size : 40,7 Mb
Release : 2012-02-03
Category : Technology & Engineering
ISBN : 9781118147788

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The Fracture of Brittle Materials by Stephen W. Freiman,John J. Mecholsky, Jr. Pdf

Supports the use and development of strong, fracture-resistant, and mechanically reliable ceramic materials The Fracture of Brittle Materials thoroughly sets forth the key scientific and engineering concepts underlying the selection of test procedures for fracture toughness, strength determination, and reliability predictions. With this book as their guide, readers can confidently test and analyze a broad range of brittle materials in order to make the best use of existing materials as well as to support the development of new materials. The authors explain the importance of microstructure in these determinations and describe the use of quantitative fractography in failure analysis. The Fracture of Brittle Materials is relevant to a broad range of ceramic materials (i.e., any inorganic non-metal), including semiconductors, cements and concrete, oxides, carbides, and nitrides. The book covers such topics as: Basic principles of fracture mechanics underlying brittle material tests and analysis procedures Theory and mechanisms of environmentally enhanced crack growth Fracture mechanics tests to determine a material's resistance to fast fracture Test and analysis methods to assess the strength of ceramics Methods to analyze the fracture process based on quantitative measurements of the fracture surface Effect of a material's microstructure Methods for predicting the lifetime of brittle components under stress Throughout the book, figures and illustrations help readers understand key concepts and methods. Replete with real-world examples, this text enables engineers and materials and ceramics scientists to select and implement the optimal testing methods for their particular research needs and then accurately analyze the results.

Author : Q. Jane Wang,Yip-Wah Chung
Publisher : Springer
Page : 4139 pages
File Size : 40,6 Mb
Release : 2013-09-26
Category : Technology & Engineering
ISBN : 0387928987

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Encyclopedia of Tribology by Q. Jane Wang,Yip-Wah Chung Pdf

TRIBOLOGY – the study of friction, wear and lubrication – impacts almost every aspect of our daily lives. The Springer Encyclopedia of Tribology is an authoritative and comprehensive reference covering all major aspects of the science and engineering of tribology that are relevant to researchers across all engineering industries and related scientific disciplines. This is the first major reference that brings together the science, engineering and technological aspects of tribology of this breadth and scope in a single work. Developed and written by leading experts in the field, the Springer Encyclopedia of Tribology covers the fundamentals as well as advanced applications across material types, different length and time scales, and encompassing various engineering applications and technologies. Exciting new areas such as nanotribology, tribochemistry and biotribology have also been included. As a six-volume set, the Springer Encyclopedia of Tribology comprises 1630 entries written by authoritative experts in each subject area, under the guidance of an international panel of key researchers from academia, national laboratories and industry. With alphabetically-arranged entries, concept diagrams and cross-linking features, this comprehensive work provides easy access to essential information for both researchers and practicing engineers in the fields of engineering (aerospace, automotive, biomedical, chemical, electrical, and mechanical) as well as materials science, physics, and chemistry.

Author : Anonim
Publisher : Unknown
Page : 190 pages
File Size : 47,8 Mb
Release : 1970
Category : Fracture mechanics
ISBN : UCSD:31822014074900

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Fracture Toughness of High-strength Materials: Theory and Practice by Anonim Pdf

Author : L.P. Pook
Publisher : WIT Press
Page : 177 pages
File Size : 43,9 Mb
Release : 2000-01-24
Category : Technology & Engineering
ISBN : 9781853127038

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Linear Elastic Fracture Mechanics for Engineers: Theory and Applications by L.P. Pook Pdf

This book fulfills the need for a short, modern, introductory text on linear elastic fracture mechanics and its engineering applications. Suitable for use by engineering undergraduates, and other newcomers to the subject, it:- • Explains the main ideas underlying present day linear elastic fracture mechanics and how these have been developed. • Shows how the ideas can be used to carry out calculations answering the question 'Does this crack matter?' from the viewpoint of an engineering designer. • Provides an understanding of the basis of standard methods and software employed to carry out calculations. • Includes additional, more advanced material, where this will increase understanding of the sometimes formidable mathematics involved, and of the various simplifications and approximations used in practical applications. The author includes all the material central to an undergraduate introductory course and ends each chapter with an overview of the material covered to aid accessibility. Familiarity with the mechanical properties of metallic materials, and with the linear elastic stress analysis of uncracked bodies is assumed.

Author : Bahram Farahmand,George Bockrath,James Glassco
Publisher : Springer Science & Business Media
Page : 386 pages
File Size : 40,7 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9781461560098

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Fatigue and Fracture Mechanics of High Risk Parts by Bahram Farahmand,George Bockrath,James Glassco Pdf

In the preliminary stage of designing new structural hardware that must perform a given mission in a fluctuating load environment, there are several factors the designers should consider. Trade studies for different design configurations should be performed and, based on strength and weight considerations, among others, an optimum configuration selected. The selected design must be able to withstand the environment in question without failure. Therefore, a comprehen sive structural analysis that consists of static, dynamic, fatigue, and fracture is necessary to ensure the integrity of the structure. During the past few decades, fracture mechanics has become a necessary discipline for the solution of many structural problems. These problems include the prevention of failures resulting from preexisting cracks in the parent material, welds or that develop under cyclic loading environment during the life of the structure. The importance of fatigue and fracture in nuclear, pressure vessel, aircraft, and aerospace structural hardware cannot be overemphasized where safety is of utmost concern. This book is written for the designer and strength analyst, as well as for the material and process engineer who is concerned with the integrity of the structural hardware under load-varying environments in which fatigue and frac ture must be given special attention. The book is a result of years of both acade mic and industrial experiences that the principal author and co-authors have accumulated through their work with aircraft and aerospace structures.

Author : Bahram Farahmand
Publisher : Springer Science & Business Media
Page : 425 pages
File Size : 50,7 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9781461515852

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Fracture Mechanics of Metals, Composites, Welds, and Bolted Joints by Bahram Farahmand Pdf

In the preliminary stage of designing new structural hardware to perform a given mission in a fluctuating load environment, there are several factors that the designer should consider. Trade studies for different design configurations should be performed and, based on strength and weight considerations, among others, an optimum configuration selected. The selected design must withstand the environment in question without failure. Therefore, a comprehensive structural analysis that consists of static, dynamic, fatigue, and fracture is necessary to ensure the integrity of the structure. Engineers must also consider the feasibility of fabricating the structural hardware in the material selection process. During the past few decades, fracture mechanics has become a necessary discipline for the solution of many structural problems in which the survivability of structure containing pre-existing flaws is of great interest. These problems include structural failures resulting from cracks that are inherent in the material, or defects that are introduced in the part due to improper handling or rough machining, that must be assessed through fracture mechanics concepts.

Author : J. J. Mecholsky
Publisher : ASTM International
Page : 416 pages
File Size : 41,9 Mb
Release : 1984
Category : Electronic
ISBN : 8210379456XXX

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Fractography of Ceramic and Metal Failures by J. J. Mecholsky Pdf

Author : David Taylor
Publisher : Elsevier
Page : 306 pages
File Size : 49,5 Mb
Release : 2010-07-07
Category : Technology & Engineering
ISBN : 0080554725

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The Theory of Critical Distances by David Taylor Pdf

Critical distance methods are extremely useful for predicting fracture and fatigue in engineering components. They also represent an important development in the theory of fracture mechanics. Despite being in use for over fifty years in some fields, there has never been a book about these methods – until now. So why now? Because the increasing use of computer-aided stress analysis (by FEA and other techniques) has made these methods extremely easy to use in practical situations. This is turn has prompted researchers to re-examine the underlying theory with renewed interest. The Theory of Critical Distances begins with a general introduction to the phenomena of mechanical failure in materials: a basic understanding of solid mechanics and materials engineering is assumed, though appropriate introductory references are provided where necessary. After a simple explanation of how to use critical distance methods, and a more detailed exposition of the methods including their history and classification, the book continues by showing examples of how critical distance approaches can be applied to predict fracture and fatigue in different classes of materials. Subsequent chapters include some more complex theoretical areas, such as multiaxial loading and contact problems, and a range of practical examples using case studies of real engineering components taken from the author’s own consultancy work. The Theory of Critical Distances will be of interest to a range of readers, from academic researchers concerned with the theoretical basis of the subject, to industrial engineers who wish to incorporate the method into modern computer-aided design and analysis. Comprehensive collection of published data, plus new data from the author's own laboratories A simple 'how-to-do-it' exposition of the method, plus examples and case studies Detailed theoretical treatment Covers all classes of materials: metals, polymers, ceramics and composites Includes fracture, fatigue, fretting, size effects and multiaxial loading

Author : Institution of Mechanical Engineers (Great Britain)
Publisher : SAE International
Page : 196 pages
File Size : 55,9 Mb
Release : 1978
Category : Technology & Engineering
ISBN : STANFORD:36105030532837

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A General Introduction to Fracture Mechanics by Institution of Mechanical Engineers (Great Britain) Pdf

Author : Richard M. Christensen
Publisher : Oxford University Press
Page : 297 pages
File Size : 51,8 Mb
Release : 2013-03-14
Category : Science
ISBN : 9780199662111

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The Theory of Materials Failure by Richard M. Christensen Pdf

This book provides an overview of the failure of materials - everything from metals to brittle ceramics.

Author : J.R. Klepaczko
Publisher : Springer
Page : 499 pages
File Size : 48,8 Mb
Release : 2014-05-04
Category : Technology & Engineering
ISBN : 9783709128244

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Crack Dynamics in Metallic Materials by J.R. Klepaczko Pdf

This book provides an up-to-date knowledge on theory and experimental results of rate-dependent fracture processes in metallic materials. The objective is to expose the current status of a growing branch of fracture mechanics called generally "Dynamic Fracture". Crack dynamics takes into account not only the effects of inertia but also rate sensitivity of a material under consideration. This volume has been prepared by four leading authorities in fracture dynamics: D.R. Curran, J.F. Kalthoff, J.R. Klepaczko and F. Nilsson. A broad range of problem is covered: dynamic fracture theory, application of dynamic fracture mechanics, dynamic crack inition and microstatistical fracture mechanics in dynamic fracture. The book in its present format may serve as a text supplement in lecturing on fracture mechanics. On the other hand, it may serve as an instructional aid in engineering of fracture prevention.

Author : Alan F. Liu
Publisher : ASM International
Page : 452 pages
File Size : 50,7 Mb
Release : 2005-01-01
Category : Technology & Engineering
ISBN : 9781615032525

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Mechanics and Mechanisms of Fracture by Alan F. Liu Pdf

Author : C. K. H. Dharan,B. S. Kang,Iain Finnie
Publisher : Springer
Page : 249 pages
File Size : 45,6 Mb
Release : 2016-10-14
Category : Technology & Engineering
ISBN : 9781493924776

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Finnie's Notes on Fracture Mechanics by C. K. H. Dharan,B. S. Kang,Iain Finnie Pdf

This textbook consists primarily of notes by Iain Finnie who taught a popular course on fracture mechanics at the University of California at Berkeley. It presents a comprehensive and detailed exposition of fracture, the fundamentals of fracture mechanics and procedures for the safe design of engineering components made from metal alloys, brittle materials like glasses and ceramics, and composites. Interesting and practical problems are listed at the end of most chapters to give the student practice in applying the theory. A solutions manual is provided to the instructor. The text presents a unified perspective of fracture with a strong fundamental foundation and practical applications. In addition to its role as a text, this reference would be invaluable for the practicing engineer who is involved in the design and evaluation of components that are fracture critical. This book also: Presents details of derivations of the basic equations of fracture mechanics and the historical context of the development of fracture theory and methodology Treats linear and nonlinear fracture mechanics methodologies beginning with a review of the basic equations of solid mechanics followed by solutions useful in fracture prediction Illustrates the basis of linear elastic fracture mechanics (LEFM), practical applications of LEFM in the design of fracture-tolerant structural components Offers interesting, practical, classroom proven problems at the end of most chapters Includes instructor's solutions manual