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Fatigue Life Estimation Of Turbine Blades Due To Transient Thermal Vibratory And Centrifugal Stresses
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Book Synopsis Fatigue Life Estimation of Turbine Blades Due to Transient Thermal, Vibratory, and Centrifugal Stresses by : Deepak Dhar
Download or read book Fatigue Life Estimation of Turbine Blades Due to Transient Thermal, Vibratory, and Centrifugal Stresses written by Deepak Dhar and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Turbine Blade Life Estimation by : J. S. Rao
Download or read book Turbine Blade Life Estimation written by J. S. Rao and published by Alpha Science Int'l Ltd.. This book was released on 2000 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: The blade life estimation is a multifaceted technology, involving free and forced vibration forces, that lead to the determination of steady and dynamic stresses at different critical speeds during the startup and shutdown procedures, as well as in the operational speed range. Propagation and unstable fracture are described with practical examples to estimate blade life.
Book Synopsis Masters Abstracts International by :
Download or read book Masters Abstracts International written by and published by . This book was released on 1996 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis AIAA Journal by : American Institute of Aeronautics and Astronautics
Download or read book AIAA Journal written by American Institute of Aeronautics and Astronautics and published by . This book was released on 1997 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stress Prediction in Turbine Blades Under Forced Excitation by :
Download or read book Stress Prediction in Turbine Blades Under Forced Excitation written by and published by . This book was released on 2016 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traditional turbine blades have root attachments which are sites of fretting fatigue failures due to the frictional sliding of the blades during vibration. Newer integrally bladed rotors (IBR) eliminate the root attachment by manufacturing the rotor disk and blades as a unitized structure. IBRs eliminate sites of fretting fatigue failure but in doing so they also eliminate frictional damping that is provided by the root attachments. The absence of frictional damping leads to larger forced-response vibration amplitudes and premature high-cycle fatigue failure in IBRs. Furthermore, IBRs also tend to exhibit blade vibrations in simultaneous multiple modes. Including these multi-mode vibration responses in estimating blade stress is critical for accurately estimating life of the blade. Conventional methods to estimate blade stresses during engine tests subjected to the forced-responses rely on vibration strain measurement techniques that measure surface strains using strain gauges. Frequency decomposition of these strain gauge data provides information on which modes are excited. The peak stress is computed using the measured strain amplitude for the particular mode and previously computed gauge factors. Strain measurement techniques are intrusive in nature and can only provide the response of the instrumented blade. Recently non-intrusive techniques such as blade tip timing (BTT) analysis have been used to measure the tip amplitude of the vibrating blade and this in conjunction with modal stresses obtained from finite element analysis can be used to estimate the peak stresses on the blade due to multi-mode excitation. This thesis demonstrates a time-domain stress superposition method, combined with a search over spatial and temporal coordinates to estimate the peak blade stresses that occur due to multi-mode excitation. A critical stress limit surface is also developed for use by test engineers in ground vibration tests to implement safety limits based on measured BTT vibration amplitudes and phase angles.
Book Synopsis Advances in Wind Turbine Blade Design and Materials by : Povl Brondsted
Download or read book Advances in Wind Turbine Blade Design and Materials written by Povl Brondsted and published by Elsevier. This book was released on 2013-10-31 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind energy is gaining critical ground in the area of renewable energy, with wind energy being predicted to provide up to 8% of the world’s consumption of electricity by 2021. Advances in wind turbine blade design and materials reviews the design and functionality of wind turbine rotor blades as well as the requirements and challenges for composite materials used in both current and future designs of wind turbine blades. Part one outlines the challenges and developments in wind turbine blade design, including aerodynamic and aeroelastic design features, fatigue loads on wind turbine blades, and characteristics of wind turbine blade airfoils. Part two discusses the fatigue behavior of composite wind turbine blades, including the micromechanical modelling and fatigue life prediction of wind turbine blade composite materials, and the effects of resin and reinforcement variations on the fatigue resistance of wind turbine blades. The final part of the book describes advances in wind turbine blade materials, development and testing, including biobased composites, surface protection and coatings, structural performance testing and the design, manufacture and testing of small wind turbine blades. Advances in wind turbine blade design and materials offers a comprehensive review of the recent advances and challenges encountered in wind turbine blade materials and design, and will provide an invaluable reference for researchers and innovators in the field of wind energy production, including materials scientists and engineers, wind turbine blade manufacturers and maintenance technicians, scientists, researchers and academics. Reviews the design and functionality of wind turbine rotor blades Examines the requirements and challenges for composite materials used in both current and future designs of wind turbine blades Provides an invaluable reference for researchers and innovators in the field of wind energy production
Download or read book Surface Engineering written by R.S. Walia and published by CRC Press. This book was released on 2022-12-19 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface engineering is considered an important aspect in the reduction of friction and wear. This reference text discusses a wide range of surface engineering technologies along with applications in a comprehensive manner. The book describes various methods in surface engineering technology with a thorough explanation of various aspects of each process that comes under this domain. Apart from an enhanced explanation of the process and its attributes, this book also gives insight into the types of materials, applications, and optimization of surface engineering techniques. It discusses important topics including surface engineering of the functionality of graded materials, materials characterization, processing of biomaterials, design, surface modification technologies and process control, smart manufacturing, artificial intelligence, and machine learning applications. The book: discusses computational and simulation analyses for better selection of process parameters covers optimizations of processes with state-of-the-art technologies discusses applications of surface engineering in medical, agricultural, architecture engineering, and allied sectors covers processing techniques of biomaterials in surface engineering The text is useful for senior undergraduate, graduate students, and academic researchers working in diverse areas such as industrial and production engineering, mechanical engineering, materials science, and manufacturing science. It covers a hybrid process for surface modification, modeling techniques, and issues in surface engineering.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Engineering Innovation: Voyage of Discovery by : Paul Thorburn
Download or read book Engineering Innovation: Voyage of Discovery written by Paul Thorburn and published by . This book was released on 1997 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1986 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Book Synopsis Damage Mechanisms and Life Assessment of High Temperature Components by : Ramaswamy Viswanathan
Download or read book Damage Mechanisms and Life Assessment of High Temperature Components written by Ramaswamy Viswanathan and published by ASM International. This book was released on 1989 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Specialists Meeting on Directionally Solidified In-Situ Composites by : E. R. Thompson
Download or read book Specialists Meeting on Directionally Solidified In-Situ Composites written by E. R. Thompson and published by . This book was released on 1974 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Turbomachine Blade Vibration by : J. S. Rao
Download or read book Turbomachine Blade Vibration written by J. S. Rao and published by New Age International. This book was released on 1991 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue Failures Of Blades Is One Of The Most Vexing Problems Of Turbomachine Manufacturers, Ever Since The Steam Turbine Became The Main Stay For Power Generating Equipment And Gas Turbines Are Increasingly Used In The Air Transport. The Problem Is Very Complex, Involving The Excitation Due To Aerodynamic Stage Interaction; Damping Due To Material Deformation, Friction At Slip Surfaces And Aerodynamic Damping; Vibration Of An Asymmetric Aerofoil Tapered Along Its Length And Mounted On A Rotating Disc At A Stagger Angle. The Problem Is Also Governed By Heat Transfer Analysis And Thermal Stresses.His Book Deals With A Basic Understanding Of Free Vibratory Behaviour Of Turbine Blades- Free Standing, Packetted, And Bladed-Discs. The Analysis Is Based On Continuous And Discrete Models Using Energy Principles And Finite Element Techniques. A Clear Understanding Of The Interference Phenomenon In A Thin Cambered Airfoil Stage In Subsonic Flow Is Presented To Determine The Nonsteady Excitation Forces Acting On The Blades. A Comprehensive Treatment On The Blade Damping Phenomenon That Occurs In Turbines Is Given. The Nonlinear Damping Models Account For Material Damping And Friction Damping As A Function Of Rotational Speed For Each Mode. Resonant Response Calculation Procedures For The Steadily Running As Well As Accelerating Blades Are Given.Cumulative Damage Calculations Are Then Outlined For Fatigue Life Estimation Of Turbomachine Blades. The Book Also Deals With Heat Transfer Analysis And Thermal Stress Calculations Which Help In A Comprehensive Understanding Of The Blade Problems.
Download or read book NASA SP. written by and published by . This book was released on 1991 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1960 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Structures and Materials Panel Publisher : ISBN 13 : Total Pages :184 pages Book Rating :4.0/5 ( download)
Book Synopsis Directionally Solidified In-situ Composites by : North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Structures and Materials Panel
Download or read book Directionally Solidified In-situ Composites written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Structures and Materials Panel and published by . This book was released on 1974 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Energy Research and Development Administration. Technical Information Center Publisher : ISBN 13 : Total Pages :724 pages Book Rating :4.3/5 (129 download)
Book Synopsis ERDA Energy Research Abstracts by : United States. Energy Research and Development Administration. Technical Information Center
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration. Technical Information Center and published by . This book was released on 1976 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:
