Development Of A Practical Methodology For Elastic Plastic And Fully Plastic Fatigue Crack Growth
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Development Of A Practical Methodology For Elastic Plastic And Fully Plastic Fatigue Crack Growth
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Author : R. Craig McClung
language : en
Publisher:
Release Date : 1999
Development Of A Practical Methodology For Elastic Plastic And Fully Plastic Fatigue Crack Growth written by R. Craig McClung and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Materials categories.
Development Of A Practical Methodology For Elastic Plastic And Fully Plastic Fatigue Crack Growth
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-06-27
Development Of A Practical Methodology For Elastic Plastic And Fully Plastic Fatigue Crack Growth written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-27 with categories.
A practical engineering methodology has been developed to analyze and predict fatigue crack growth rates under elastic-plastic and fully plastic conditions. The methodology employs the closure-corrected effective range of the J-integral, delta J(sub eff) as the governing parameter. The methodology contains original and literature J and delta J solutions for specific geometries, along with general methods for estimating J for other geometries and other loading conditions, including combined mechanical loading and combined primary and secondary loading. The methodology also contains specific practical algorithms that translate a J solution into a prediction of fatigue crack growth rate or life, including methods for determining crack opening levels, crack instability conditions, and material properties. A critical core subset of the J solutions and the practical algorithms has been implemented into independent elastic-plastic NASGRO modules. All components of the entire methodology, including the NASGRO modules, have been verified through analysis and experiment, and limits of applicability have been identified. McClung, R. C. and Chell, G. G. and Lee, Y. -D. and Russell, D. A. and Orient, G. E. Marshall Space Flight Center NAS8-37828...
A Practical Methodology For Elastic Plastic Fatigue Crack Growth
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Author : GG. Chell
language : en
Publisher:
Release Date : 1997
A Practical Methodology For Elastic Plastic Fatigue Crack Growth written by GG. Chell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Combined loading categories.
A practical methodology is being developed to characterize elastic-plastic fatigue crack growth (EPFCG) behavior. The methodology will be implemented in engineering software for crack growth analysis and life prediction of advanced reusable aerospace propulsion systems. The correlating parameter upon which the methodology is based is the range of the J-integral, ?J. Existing J solutions are summarized, and robust methods for developing new J solutions under various loading configurations are introduced and validated. Some practical crack growth algorithms required to translate a J calculation into a quantitative prediction of EPFCG life are highlighted. Crack closure plays a significant role in the engineering characterization of EPFCG rates, and simple algorithms to estimate closure stresses are described. Other algorithms address the tearing-fatigue interaction near final instability and the estimation of required material properties. Early results from experimental verification tests are reported.
A Practical Approach To Fracture Mechanics
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Author : Jorge Luis González-Velázquez
language : en
Publisher: Elsevier
Release Date : 2020-10-08
A Practical Approach To Fracture Mechanics written by Jorge Luis González-Velázquez and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-10-08 with Technology & Engineering categories.
A Practical Approach to Fracture Mechanics provides a concise overview on the fundamental concepts of fracture mechanics, discussing linear elastic fracture mechanics, fracture toughness, ductile fracture, slow crack propagation, structural integrity, and more. The book outlines analytical and experimental methods for determining the fracture resistance of mechanical and structural components, also demonstrating the use of fracture mechanics in failure analysis, reinforcement of cracked structures, and remaining life estimation. The characteristics of crack propagation induced by fatigue, stress-corrosion, creep, and absorbed hydrogen are also discussed. The book concludes with a chapter on the structural integrity analysis of cracked components alongside a real integrity assessment. This book will be especially useful for students in mechanical, civil, industrial, metallurgical, aeronautical and chemical engineering, and for professional engineers looking for a refresher on core principles. Concisely outlines the underlying fundamentals of fracture mechanics, making physical concepts clear and simple and providing easily-understood applied examples Includes solved problems of the most common calculations, along with step-by-step procedures to perform widely-used methods in fracture mechanics Demonstrates how to determine stress intensity factors and fracture toughness, estimate crack growth rate, calculate failure load, and other methods and techniques
Fatigue And Fracture Mechanics
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Author : Robert S. Piascik
language : en
Publisher: ASTM International
Release Date : 1997
Fatigue And Fracture Mechanics written by Robert S. Piascik and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Aluminum alloys categories.
Plasticity And Fracture
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Author : Wolfgang Brocks
language : en
Publisher: Springer
Release Date : 2017-08-16
Plasticity And Fracture written by Wolfgang Brocks and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-08-16 with Science categories.
This book is based on 40 years of research and teaching in the fields of fracture mechanics and plasticity. It will bring students and engineers from various disciplines up to date on key concepts that have become increasingly important in the design of safety-relevant engineering structures in general and in modern lightweight structures in the transportation industry in particular. Primarily intended for graduate students in the engineering sciences and practicing structural engineers, it employs a multidisciplinary approach that comprises theoretical concepts, numerical methods, and experimental techniques. In addition, it includes a wealth of analytical and numerical examples, used to illustrate the applications of the concepts discussed.
Advanced Methods Of Fatigue Assessment
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Author : Dieter Radaj
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-05-13
Advanced Methods Of Fatigue Assessment written by Dieter Radaj and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-05-13 with Technology & Engineering categories.
In five chapters, this volume presents recent developments in fatigue assessment. In the first chapter, a generalized Neuber concept of fictitious notch rounding is presented where the microstructural support factors depend on the notch opening angle besides the loading mode. The second chapter specifies the notch stress factor including the strain energy density and J-integral concept while the SED approach is applied to common fillet welded joints and to thin-sheet lap welded joints in the third chapter. The forth chapter analyses elastic-plastic deformations in the near crack tip zone and discusses driving force parameters. The last chapter discusses thermomechanical fatigue, stress, and strain ranges.
A Fatigue Crack Growth Theory Based On Energy Considerations
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Author : PP. Milella
language : en
Publisher:
Release Date : 1999
A Fatigue Crack Growth Theory Based On Energy Considerations written by PP. Milella and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Crack closure categories.
The paper presents a further development of a fatigue crack growth theory based on an energy approach first published by the author in 1981 [1] and later revised in 1996 [2]. In an ideally elastic material containing a crack the only mechanism through which energy can be absorbed during a virtual crack extension is that associated to the creation of new free surface. It is an "in-out" situation in that a crack of a given length 2a under a stress state ? either becomes unstable or stays like it is. At variance, in a real elastic-plastic material the energy absorption rate R derives mainly from the energy stored ahead of the crack tip as plastic strain energy. The resistance R is no longer represented by a constant term, but becomes a rather complex function of crack length, increasing as the crack grows. The consequence is that even though a certain combination of crack size 2a and stress ? does not produce instability, yet there is sufficient energy in the system to drive the crack to a point where the driving force b is equal to the resistance R and the crack stops. Unloading the system and reloading it, the crack grows by fatigue indicating that the previous condition b = R is no longer satisfied. If this happens, it is because the volume that yields ahead of the crack tip is not capable during the reloading to absorb energy with the same rate as before. This forces the crack to grow further to regain the loss of energy absorption rate through the yielding of new material and to establish again the equilibrium between b and R. The author has related this lack of material capability to develop the same energy absorption rate in any of the following cycles to a shake-down effect that takes place in the plastic enclave. In each cycle, the loss of energy absorption rate is a fraction of the elastic one. The author has related this lack of material capability to develop the same energy absorption rate in any of the following cycles to a shake down effect that takes place in the plastic enclave. In each cycle, the loss of energy absorption rate is a fraction of the elastic one. Based on this hypothesis and on the assumption that the maximum fatigue crack growth can be inferred from the extension of the stretch-zone developed at the crack tip at the moment when the material starts to tear in a monotonic loading test, i.e., at JIc, a fatigue crack growth equation is obtained that relates the growth rate ?a not only to the stress intensity factor excursion ?K, but also to the toughness KIc of the material, through an exponent n, ranging from 2 to 4, which depends on the shape of the material J-R curve. The theory and the equation also explain why short cracks shall grow faster than large ones and actually define what shall be considered as a real short crack. It is also explained why the fatigue crack growth rate depends on the ratio between the minimum and maximum applied stress and is practically the same in any material independently of its yield stress and toughness.
A Semi Markovian Model For Low Cycle Elastic Plastic Fatigue Crack Growth
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Author : Faisal H. Al-Sugair
language : en
Publisher:
Release Date : 1988
A Semi Markovian Model For Low Cycle Elastic Plastic Fatigue Crack Growth written by Faisal H. Al-Sugair and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Fracture mechanics categories.
Proceedings Of First Ijfatigue Ffems Joint Workshop
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Author :
language : en
Publisher: Gruppo Italiano Frattura
Release Date :
Proceedings Of First Ijfatigue Ffems Joint Workshop written by and has been published by Gruppo Italiano Frattura this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.