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Author: Ashish Kumar Singh
Publisher: Ashish Kumar Singh
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 62
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Book Description
This E-book is a master's dissertation on ‘Failure Analysis of Shaft with Step and Keyway Discontinuities Under Combined Loading ' submitted in May, 2018. In all power transmission elements shaft is almost use in every machine or in every mechanical system. Shaft is a rotating machine element, commonly in circular cross-section, is used to transmit power and rotational motion to other parts such as gears, pulleys, flywheels sprockets and clutches. Various elements, which are used to transmit power from the driving device (motor or engine) are mounted on the shaft with the help of keys. Design of shaft is very important part in mechanical design. In real life, the shaft is subjected to combined loading. A shaft often fails due to the stress concentration in discontinuities areas resulting into large stress values. The most common discontinuities present in the shafts are grooves, slots, shoulders, fillets, holes, thread, etc. Due to presence of these geometrical discontinuities, the stresses are concentrated in discontinuities areas thereby reducing its strength. In the present work, an effort is made to calculate the equivalent stresses and maximum shear stresses developed in shaft due to step and presence of keyways (either single or multiple). These stresses are determined analytically and using finite element analysis (FEA) subjected to combined loading. The modelling of shaft with single keyway (rectangular, square, tapered, semi-circular) is carried out using CREO software and FEA is carried out in ANSYS. Further, the stresses are also determined for shaft with double keyways (rectangular, semi-circular) and stepped shaft with single and double rectangular keyways. Symmetrical and non-symmetrical orientations of double keyways in shaft, is also modelled and analysed. It is concluded that rectangular keyway in solid shaft is best among all the modelled and analyzed keyway in shaft as far as the concern of equivalent and shear stresses and in case of both rectangular and semi-circular keyways, double symmetrical keyways in solid shaft is more suitable than non-symmetrical keyways under combined loading conditions. It is also concluded that double symmetrical keyways in stepped shaft is more suitable than non-symmetrical keyway under combined loading conditions due to less generation of stresses.
Author: Ashish Kumar Singh
Publisher: Ashish Kumar Singh
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 62
Get Book Here
Book Description
This E-book is a master's dissertation on ‘Failure Analysis of Shaft with Step and Keyway Discontinuities Under Combined Loading ' submitted in May, 2018. In all power transmission elements shaft is almost use in every machine or in every mechanical system. Shaft is a rotating machine element, commonly in circular cross-section, is used to transmit power and rotational motion to other parts such as gears, pulleys, flywheels sprockets and clutches. Various elements, which are used to transmit power from the driving device (motor or engine) are mounted on the shaft with the help of keys. Design of shaft is very important part in mechanical design. In real life, the shaft is subjected to combined loading. A shaft often fails due to the stress concentration in discontinuities areas resulting into large stress values. The most common discontinuities present in the shafts are grooves, slots, shoulders, fillets, holes, thread, etc. Due to presence of these geometrical discontinuities, the stresses are concentrated in discontinuities areas thereby reducing its strength. In the present work, an effort is made to calculate the equivalent stresses and maximum shear stresses developed in shaft due to step and presence of keyways (either single or multiple). These stresses are determined analytically and using finite element analysis (FEA) subjected to combined loading. The modelling of shaft with single keyway (rectangular, square, tapered, semi-circular) is carried out using CREO software and FEA is carried out in ANSYS. Further, the stresses are also determined for shaft with double keyways (rectangular, semi-circular) and stepped shaft with single and double rectangular keyways. Symmetrical and non-symmetrical orientations of double keyways in shaft, is also modelled and analysed. It is concluded that rectangular keyway in solid shaft is best among all the modelled and analyzed keyway in shaft as far as the concern of equivalent and shear stresses and in case of both rectangular and semi-circular keyways, double symmetrical keyways in solid shaft is more suitable than non-symmetrical keyways under combined loading conditions. It is also concluded that double symmetrical keyways in stepped shaft is more suitable than non-symmetrical keyway under combined loading conditions due to less generation of stresses.
Author: Walter D. Pilkey
Publisher: John Wiley & Sons
ISBN: 1119532523
Category : Technology & Engineering
Languages : en
Pages : 816
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Book Description
The bible of stress concentration factors—updated to reflect today's advances in stress analysis This book establishes and maintains a system of data classification for all the applications of stress and strain analysis, and expedites their synthesis into CAD applications. Filled with all of the latest developments in stress and strain analysis, this Fourth Edition presents stress concentration factors both graphically and with formulas, and the illustrated index allows readers to identify structures and shapes of interest based on the geometry and loading of the location of a stress concentration factor. Peterson's Stress Concentration Factors, Fourth Edition includes a thorough introduction of the theory and methods for static and fatigue design, quantification of stress and strain, research on stress concentration factors for weld joints and composite materials, and a new introduction to the systematic stress analysis approach using Finite Element Analysis (FEA). From notches and grooves to shoulder fillets and holes, readers will learn everything they need to know about stress concentration in one single volume. Peterson's is the practitioner's go-to stress concentration factors reference Includes completely revised introductory chapters on fundamentals of stress analysis; miscellaneous design elements; finite element analysis (FEA) for stress analysis Features new research on stress concentration factors related to weld joints and composite materials Takes a deep dive into the theory and methods for material characterization, quantification and analysis methods of stress and strain, and static and fatigue design Peterson's Stress Concentration Factors is an excellent book for all mechanical, civil, and structural engineers, and for all engineering students and researchers.
Author: Lester E. Alban
Publisher: ASM International
ISBN: 9781615031771
Category : Technology & Engineering
Languages : en
Pages : 252
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Book Description
Explores the detailed steps necessary to determine the causes of failure. First, the physical characteristics of a gear are studied: where the stress points are, from what directions the forces are applied, where the movement of material progresses, and where strain patterns exist. Second, all external conditions and forces are considered. With this background information, a systematic examination is described from beginning to end, the end being a conclusion about the mode and cause of failure.
Author: Lauralice de Campos Franceschini Canale
Publisher: ASM International
ISBN: 1615030980
Category : Technology & Engineering
Languages : en
Pages : 651
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Book Description
Author: Horst Czichos
Publisher: Springer Science & Business Media
ISBN: 3540303006
Category : Technology & Engineering
Languages : en
Pages : 1215
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Book Description
This Handbook compiles advanced methods for materials measurement and characterization from the macroscopic to the nano-scale. Materials professionals need not only handbooks of materials data but clear guidelines and standards for how to measure the full spectrum of materials characteristics of new materials ans systems. Since materials science forms a bridge between the more traditonal fields of physics, engineering, and chemistry, unifying the varying perspectives and covering the full gamut of properties also serves a useful purpose. This handbook is the first dedicated to these practical and important considerations.
Author:
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 762
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Book Description
Author: Baotang Shen
Publisher: Springer Science & Business Media
ISBN: 9400769040
Category : Science
Languages : en
Pages : 181
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Book Description
This text book provides the theoretical background of rock fracture mechanics and displacement discontinuity methods used for the modelling of geomechanical problems. The computer program FRACOD is used to analyse the fracture problems, assessing fracture initiation and propagation in tension (Mode I), shear (Mode II) and mixed mode I and II of solid intact or jointed geomaterials. The book also presents the fundamentals of thermo-mechanical coupling and hydro-mechanical coupling. Formulations of multiple regional mechanical, thermal and hydraulic functions, which allow analyses of fracture mechanics problems for structures made of brittle, rock-like materials, are provided. In addition, instructive examples of code verification and applications are presented. Additional material: The 2-D version of the FRACOD program, a manual on the program and a wealth of verification examples of classical problems in physics, mechanics and hydromechanics are available at http://extras.springer.com. A large number of applications related to civil, mining, petroleum and environmental engineering are also included. - The first textbook available on modelling of rock fracture propagation - Introduces readers to the fundamentals of rock fracturing - Uses a modern style of teaching with theory, mathematical modelling and applications in one package - The basic version of the FRACOD software, manual, verification examples and applications are available as additional material - The FRACOD program and manual enable the readers to solve fracture propagation problems on their own --------------------------- Ki-Bok Min, Department of Energy Resources Engineering, College of Engineering, Seoul National University, Korea “Challenging rock engineering applications require extreme conditions of stress, temperature and hydraulic pressure resulting in rock fracturing to a various extent. The FRACOD is one of few computer codes available in engineering rock mechanics that can simulate the initiation and propagation of fractures often interacting with natural fractures. Its capability has been significantly enhanced to include the hydraulic and thermal fracturing with concerted interaction from multi-national research and industry partners. My experience with the FRACOD is very positive and I am certain that its already-excellent track record will expand further in the future."
Author: Robert C. Juvinall
Publisher: John Wiley & Sons
ISBN: 1119723604
Category : Technology & Engineering
Languages : en
Pages : 805
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Book Description
Fundamentals of Machine Component Design presents a thorough introduction to the concepts and methods essential to mechanical engineering design, analysis, and application. In-depth coverage of major topics, including free body diagrams, force flow concepts, failure theories, and fatigue design, are coupled with specific applications to bearings, springs, brakes, clutches, fasteners, and more for a real-world functional body of knowledge. Critical thinking and problem-solving skills are strengthened through a graphical procedural framework, enabling the effective identification of problems and clear presentation of solutions. Solidly focused on practical applications of fundamental theory, this text helps students develop the ability to conceptualize designs, interpret test results, and facilitate improvement. Clear presentation reinforces central ideas with multiple case studies, in-class exercises, homework problems, computer software data sets, and access to supplemental internet resources, while appendices provide extensive reference material on processing methods, joinability, failure modes, and material properties to aid student comprehension and encourage self-study.
Author: Barry Dupen
Publisher: Createspace Independent Publishing Platform
ISBN: 9781987736489
Category :
Languages : en
Pages : 176
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Book Description
This algebra-based text is designed specifically for Engineering Technology students, using both SI and US Customary units. All example problems are fully worked out with unit conversions. Unlike most textbooks, this one is updated each semester using student comments, with an average of 80 changes per edition.
Author: Michael W. O'Neill
Publisher:
ISBN:
Category : Foundations
Languages : en
Pages :
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Book Description
