Notch Effects In Fatigue And Fracture
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Notch Effects In Fatigue And Fracture
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Author : G. Pluvinage
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Notch Effects In Fatigue And Fracture written by G. Pluvinage 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 2012-12-06 with Science categories.
As Directors of this NATO Workshop, we welcome this opportunity to record formally our thanks to the NATO Scientific Affairs Division for making our meeting possible through generous financial support and encouragement. This meeting has two purposes: the first obvious one because we have collected scientists from East, far East and west to discuss new development in the field of fracture mechanics: the notch fracture mechanics. The second is less obvious but perhaps in longer term more important that is the building of bridges between scientists in the frame of a network called Without Walls Institute on Notch Effects in Fatigue and Fracture". Physical perception of notch effects is not so easy to understand as the presence of a geometrical discontinuity as a worst effect than the simple reduction of cross section. Notch effects in fatigue and fracture is characterised by the following fundamental fact: it is not the maximum local stress or stress which governs the phenomena of fatigue and fracture. The physic shows that a process volume is needed probably to store the necessary energy for starting and propagating the phenomenon. This is a rupture of the traditional "strength of material" school which always give the prior importance of the local maximum stress. This concept of process volume was strongly affirmed during this workshop.
Theory Of Elasticity And Stress Concentration
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Author : Yukitaka Murakami
language : en
Publisher: John Wiley & Sons
Release Date : 2016-09-13
Theory Of Elasticity And Stress Concentration written by Yukitaka Murakami and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-09-13 with Technology & Engineering categories.
Theory of Elasticity and Stress Concentration Yukitaka Murakami, Kyushu University, Japan A comprehensive guide to elasticity and stress concentration Theory of Elasticity and Stress Concentration comprehensively covers elasticity and stress concentration and demonstrates how to apply the theory to practical engineering problems. The book presents a new approach to the topic without the need for complicated mathematics, and the principles and meaning of stress concentration are covered without reliance on numerical analysis. The book consists of two parts: Part I - Theory of Elasticity and Part II - Stress Concentration. Part I treats the theory of elasticity from the viewpoint of helping the reader to comprehend the essence of it. Part II treats the principle and meaning of stress concentration and guides the reader to a better understanding of it. Throughout the book, many useful and interesting applications of the basic new way of thinking are presented and explained. Key features: Unique approach to the topics. Encourages the readers to acquire the new way of thinking and engineering judgement. Includes examples, problems and solutions. This book provides essential reading for researchers and practitioners in the structural and mechanical engineering industries.
Fracture And Fatigue Emanating From Stress Concentrators
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Author : G. Pluvinage
language : en
Publisher: Springer Science & Business Media
Release Date : 2003-12-31
Fracture And Fatigue Emanating From Stress Concentrators written by G. Pluvinage 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 2003-12-31 with Technology & Engineering categories.
A vast majority of failures emanate from stress concentrators such as geometrical discontinuities. The role of stress concentration was first highlighted by Inglis (1912) who gives a stress concentration factor for an elliptical defect, and later by Neuber (1936). With the progress in computing, it is now possible to compute the real stress distribution at a notch tip. This distribution is not simple, but looks like pseudo-singularity as in principle the power dependence with distance remains. This distribution is governed by the notch stress intensity factor which is the basis of Notch Fracture Mechanics. Notch Fracture Mechanics is associated with the volumetric method which postulates that fracture requires a physical volume. Since fatigue also needs a physical process volume, Notch Fracture Mechanics can easily be extended to fatigue emanating from a stress concentration.
Fatigue At Notches And The Local Strain And Fracture Mechanics Approaches
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Author : NE. Dowling
language : en
Publisher:
Release Date : 1979
Fatigue At Notches And The Local Strain And Fracture Mechanics Approaches written by NE. Dowling and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Crack propagation categories.
Total fatigue lives of notched members are considered to be divided into initiation and propagation phases. Notch size effects caused by crack propagation are accounted for automatically if initiation is defined as a crack size within the local notch stress field. The extent of this field may he estimated from fracture mechanics analysis, with its size being on the order of one tenth of the notch radius. Plasticity effects must be handled properly in predicting crack initiation, but linear elastic analysis is generally satisfactory for handling the propagation phase.
Analysis Of The Notch Effect In Fatigue
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Author : K. Yanase
language : en
Publisher:
Release Date : 2012
Analysis Of The Notch Effect In Fatigue written by K. Yanase and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Dugdale model categories.
The fatigue-crack propagation at stress concentrations is a topic of significant importance in a number of engineering applications. Further, it is recognized that the fatigue limit of notched components is dictated by the critical condition for either initiation or propagation of a small crack at the root of a notch. Moreover, because most fatigue cracks spend the vast majority of their lives as short cracks, the behavior of such a flaw is of significant importance. In the literature, McEvily and co-workers [McEvily, A. J., Eifler, D., and Macherauch, E., "An analysis of the Fatigue Growth of Short Fatigue Cracks," Eng. Fract. Mech., Vol. 40, No. 3, 1991, pp. 571-584] developed a modified linear elastic fracture mechanics (LEFM) approach to tackle a number of fatigue problems, including the growth and threshold behavior of small fatigue cracks. In this study, a further extension is presented to deal with notch effects in fatigue. In this method, the elastic-plastic behavior and the crack closure are taken into account, as the major factors responsible for the peculiar behavior of small fatigue cracks emanating from notches. In the present paper, the notch effect in fatigue is systematically investigated by making use of a mechanism-based computational framework. A series of parametric studies demonstrate the predictive capability of the proposed framework. Based on the thorough investigation for notch-fatigue problem, the novelty of present study is illustrated.
Residual Stress Effects On Fatigue And Fracture Testing And Incorporation Of Results Into Design
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Author : Michael R. Mitchell
language : en
Publisher: ASTM International
Release Date : 2007
Residual Stress Effects On Fatigue And Fracture Testing And Incorporation Of Results Into Design written by Michael R. Mitchell and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Fracture mechanics categories.
"Eleven peer-reviewed papers, written by experts in their field, provide an understanding of residual stresses, fatigue crack growth, fatigue lifetime predictions, and their effect on structural integrity. Residual stresses can be present due to processing and manufacturing of materials and structures, so it is imperative to understand how and why they can influence the test data that we used in structural design methodologies. Residual stresses may also be intentionally engineered into structures in attempts to improve fatigue life, and it is equally important that designers understand how to account for these potential effects on fatigue life."--Publisher's website.
Theory Of Notch Stresses
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Author : Heinz Neuber
language : en
Publisher:
Release Date : 1946
Theory Of Notch Stresses written by Heinz Neuber and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1946 with Technology & Engineering categories.
An Analysis Of Notch Size Effects At The Fatigue Limit
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Author : DL. Du Quesnay
language : en
Publisher:
Release Date : 1988
An Analysis Of Notch Size Effects At The Fatigue Limit written by DL. Du Quesnay and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Fatigue (metals) categories.
This investigation examines the variation of the fatigue notch factor with notch size for sharp and blunt notches. Analytical expressions are developed to predict the fatigue notch factor for sharp notches based on short crack fracture mechanics and for blunt notches based on Neuber's rule. Experimental evidence to support these expressions is provided together with fatigue notch factors for circularly center-notched plate specimens of 2024-T351 aluminum and SAE 1045 steel. The notch diameters were varied from 0.24 to 5.0 mm. The specimens were tested in laboratory air under uniaxial constant-amplitude loading at load ratios of R = -1 and R = 0. Further experimental evidence to support the analysis is provided by data from the literature for two low carbon steels and a copper. At the fatigue limit, the fatigue notch factor increases with notch size for sharp notches. However, a notch-size effect does not occur for blunt notches. The observed notch-size effects from this and other investigations are in good agreement with the analytical expressions that are presented.
Effects Of Notches On Low Cycle Fatigue A Literature Survey
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Author : B. M. Wundt
language : en
Publisher: ASTM International
Release Date :
Effects Of Notches On Low Cycle Fatigue A Literature Survey written by B. M. Wundt and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Design Of Fatigue And Fracture Resistant Structures
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Author : P. R. Abelkis
language : en
Publisher: ASTM International
Release Date : 1982
Design Of Fatigue And Fracture Resistant Structures written by P. R. Abelkis and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Technology & Engineering categories.