Fatigue At Notches And The Local Strain And Fracture Mechanics Approaches
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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.
Fatigue Assessment Of Welded Joints By Local Approaches
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Author : Dieter Radaj
language : en
Publisher: Woodhead Publishing
Release Date : 2006-10-30
Fatigue Assessment Of Welded Joints By Local Approaches written by Dieter Radaj and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-10-30 with Technology & Engineering categories.
Local approaches to fatigue assessment are used to predict the structural durability of welded joints, to optimise their design and to evaluate unforeseen joint failures. This standard work provides a systematic survey of the principles and practical applications of the various methods. It covers the hot spot structural stress approach to fatigue in general, the notch stress and notch strain approach to crack initiation and the fracture mechanics approach to crack propagation. Seam-welded and spot-welded joints in structural steels and aluminium alloys are also considered.This completely reworked second edition takes into account the tremendous progress in understanding and applying local approaches which has been achieved in the last decade. It is a standard reference for designers, structural analysts and testing engineers who are responsible for the fatigue-resistant in-service behaviour of welded structures. Completely reworked second edition of a standard work providing a systematic survey of the principles and practical applications of the various methods Covers the hot spot structural stress approach to fatigue in general, the notch stress and notch strain approach to crack initiation and the fracture mechanics approach to crack propagation. Written by a distinguished team of authors
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.
Spectrum Fatigue Life Assessment Of Notched Specimens Using A Fracture Mechanics Based Approach
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Author : P. Heuler
language : en
Publisher:
Release Date : 1994
Spectrum Fatigue Life Assessment Of Notched Specimens Using A Fracture Mechanics Based Approach written by P. Heuler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Crack initiation categories.
Local strain based approaches have been used frequently for the prediction of crack initiation life of notched components. Limitations of the transferability of smooth specimen fatigue data to the notch root as well as cumulative damage problems have been handled by use of fatigue notch factors and consideration of some damage contribution below the fatigue limit. This type of a conventional approach has been applied as a reference case for the present study.
Fatigue Assessment Of Welded Joints By Local Approaches
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Author : Dieter Radaj
language : en
Publisher: Woodhead Publishing
Release Date : 1998
Fatigue Assessment Of Welded Joints By Local Approaches written by Dieter Radaj and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Technology & Engineering categories.
Fatigue And Fracture Mechanics
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Author : John H. Underwood
language : en
Publisher: ASTM International
Release Date : 1997
Fatigue And Fracture Mechanics written by John H. Underwood 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 Fracture mechanics categories.
A Method For Conducting Automated Fatigue Crack Initiation Tests On Fracture Mechanics Specimens
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Author : PS. Pao
language : en
Publisher:
Release Date : 2002
A Method For Conducting Automated Fatigue Crack Initiation Tests On Fracture Mechanics Specimens written by PS. Pao and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Constant amplitude categories.
Fatigue crack initiation in notched members is controlled by local strains at the notch root. A number of approaches have been developed for calculating local notch-tip stresses and strains from nominal stress and notch geometry considerations. One such approach uses the parameter ?K/?1/2, where ?K is the fracture mechanics stress intensity range and ? is the notch root radius. The parameter ?K/?1/2 has been shown to correlate with local notch-tip strain and provide a means of normalizing cycles-to-initiation, Ni, data for various notch-tip geometries. Fatigue crack growth rate specimens described in ASTM Test Method for Plane-Strain Fracture Toughness of Metallic Materials (E 399), ASTM Test Method for Measurement of Fatigue Crack Growth Rates (E 647) and elsewhere can be used for fatigue crack initiation testing if they have blunt notches. Data in the form of parameter ?K/?1/2 versus Ni has the same units as the traditional S-N curves. The advantage of having data in the form parameter parameter ?K/?1/2 versus Ni is that information is available on ?K and ? . As in all fracture mechanics testing, data obtained on one specimen geometry can be applied to a wide variety of structural geometries. This approach can be used in conjunction with commercially available software for fatigue crack growth rate testing, servohydraulic testing equipment, and modified fracture mechanics specimens to automate fatigue crack initiation testing. The combination of all of these elements represents a new test method. Results are presented for aluminum alloy 7075, where the effects of corrosion pits were studied and for titanium alloy Ti-6A1-4V, where the effects of heat treatment on initiation were studied.
Basic Fracture Mechanics
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Author : R N L Smith
language : en
Publisher: Elsevier
Release Date : 2013-10-22
Basic Fracture Mechanics written by R N L Smith and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-22 with Technology & Engineering categories.
BASIC Fracture Mechanics: Including an Introduction to Fatigue discusses the fundamentals of fracture and fatigue. The book presents a series of Beginner's All-purpose Symbolic Instruction Code (BASIC) programs that implement fracture and fatigue methods. The first chapter reviews the BASIC, while the second chapter covers elastic fracture. Chapter 3 deals with the stress intensity factors. The book also tackles the crack tip plasticity and covers crack growth. The last chapter in the text discusses some applications in fracture mechanics. The book will be of great use to engineers who want to get acquainted with fracture mechanics.
Fatigue And Fracture Mechanics
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Author : Kenneth L. Jerina
language : en
Publisher: ASTM International
Release Date : 2000
Fatigue And Fracture Mechanics written by Kenneth L. Jerina and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Technology & Engineering categories.
Multiaxial Notch Fracture And Fatigue
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Author : Xiangqiao Yan
language : en
Publisher: CRC Press
Release Date : 2023-02-28
Multiaxial Notch Fracture And Fatigue written by Xiangqiao Yan and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-02-28 with Mathematics categories.
This book presents the unified fatigue life prediction equation for low/medium/high cycle fatigue of metallic materials relevant to plain materials and notched components. The unified fatigue life prediction equation is the Wöhler equation, in which the "stress-based intensity parameter" is calculated based on the linear-elastic analysis. A local approach for the static fracture analysis for notched components is presented based on the notch linear-elastic stress field. In the local approach, a stress intensity parameter is taken as a stress-based intensity parameter. Experimental verifications show that the local approach is also suited for the static fracture analysis for notched components made of ductile materials. The book is also concerned with a material failure problem under the multiaxial stress states. A concept of the material intensity parameter is introduced in this book. It is a material property parameter that depends on both Mode-I fracture toughness and Mode-II (or Mode-III) fracture toughness and the multiaxial parameter to characterize the variation of the material failure resistance (notch fracture toughness) with the multiaxial stresses states. The failure condition to assess mixed-mode fracture of notched (or cracked) components is stated as the stress-based intensity parameter being equal to the material intensity parameter. With respect to the traditional S-N equation, a similar S-N equation is presented and verified to have high accuracy. This book will be of interest to professionals in the field of fatigue and fracture for both brittle and ductile materials.