Elastic T Stress Solutions Of Embedded Elliptical Cracks Subjected To Uniaxial And Biaxial Loadings
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Elastic T Stress Solutions Of Embedded Elliptical Cracks Subjected To Uniaxial And Biaxial Loadings
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Author : Jie Qu
language : en
Publisher:
Release Date : 2006
Elastic T Stress Solutions Of Embedded Elliptical Cracks Subjected To Uniaxial And Biaxial Loadings written by Jie Qu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Biaxial loading categories.
The elastic T-stress has been found to be an important parameter in characterizing the near crack tip elastic-plastic stress states of 2-D and 3-D crack problems. In addition to the J-integral, the T-stress provides an effective two-parameter characterization of 2-D and 3-D elastic-plastic crack tip fields in a variety of crack configurations under small scale yielding conditions. Embedded elliptical crack in an infinite solid subjected to uniaxial or biaxial tension conditions represents an excellent model for many engineering components with embedded cracks. Although extensive analyses are available for stress intensity factors (SIFs) for embedded elliptical cracks, to date no analytical T-stress solutions are available. This paper presents the exact close form solutions for elastic T-stress of an embedded elliptical crack in an infinite body under remote uniaxial or biaxial tension. The foundation of the derivation is based on the potential method for three-dimensional elasticity. Solutions of stress components parallel to and perpendicular to the cracked plane are derived first. T-stress is then obtained from the asymptotic stress field near the crack front. Complete solutions of T-stress along the crack front are established. Further, three-dimensional finite element analyses are conducted to verify the derived solutions; excellent agreements are achieved. When combined with the corresponding K or J solutions, these T-stress solutions are suitable for the analysis of constraint effects for embedded elliptical shaped cracks in engineering components.
Fracture Mechanics
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Author : Nestor Perez
language : en
Publisher: Springer
Release Date : 2016-08-13
Fracture Mechanics written by Nestor Perez and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-08-13 with Science categories.
The second edition of this textbook includes a refined presentation of concepts in each chapter, additional examples; new problems and sections, such as conformal mapping and mechanical behavior of wood; while retaining all the features of the original book. The material included in this book is based upon the development of analytical and numerical procedures pertinent to particular fields of linear elastic fracture mechanics (LEFM) and plastic fracture mechanics (PFM), including mixed-mode-loading interaction. The mathematical approach undertaken herein is coupled with a brief review of several fracture theories available in cited references, along with many color images and figures. Dynamic fracture mechanics is included through the field of fatigue and Charpy impact testing.
Stress And Fracture Analyses Of Semi Elliptical Surface Cracks
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Author : WG. Reuter
language : en
Publisher:
Release Date : 2000
Stress And Fracture Analyses Of Semi Elliptical Surface Cracks written by WG. Reuter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Constraint categories.
The present paper concentrates on both elastic and elastic-plastic finite-element stress analyses of the surface crack in a plate subjected to tension and bending loads. Stress-intensity factor (K) equations that cover a wider range of crack-length-to-width ratios, than those previously developed by Newman and Raju, for various crack-depth-to-crack-length ratios and crack-depth-to-plate-thickness ratios have been developed and are presented. These equations are used in the subsequent fracture analyses of surface crack specimens subjected to tension and bending loads. From elastic-plastic finite-element analyses, the variations of a hyper-local constraint parameter (?h) along the surface-crack front were studied to identify the region of maximum constraint and the critical fracture location. (The hyper-local constraint parameter is based on the average normal stresses acting over the plastic-zone region on a line in the crack plane perpendicular to the crack front.) The application of linear-elastic fracture mechanics to fracture of surface-crack specimens made of a high-strength D6AC steel are presented for both tension and bending loads. Two methods were used to characterize fracture: the K2-integral around the crack front and K at a critical fracture location (?c). The critical fracture location was the location of the maximum of the product of K times ?h. These two methods were used to evaluate the fracture toughness for both the crack-initiation loads and at the maximum failure load conditions. For tension and bending loads, the K2-integral method correlated 90% of the fracture data within ±25% in terms of load, whereas K at the critical fracture location correlated the data within ±20%.
Applied Mechanics Reviews
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Author :
language : en
Publisher:
Release Date : 1988
Applied Mechanics Reviews written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Mechanics, Applied categories.
On The Constraint Based Failure Assessment Of Surface Cracked Plates Under Biaxial Loading
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Author : X. Wang
language : en
Publisher:
Release Date : 2005
On The Constraint Based Failure Assessment Of Surface Cracked Plates Under Biaxial Loading written by X. Wang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Biaxial loading categories.
Surface cracked plates under biaxial loading represent an excellent model of cracked welded structures experiencing complex loadings. For example, girth and seam welds in pressure vessels are subject to biaxial stress fields. In this paper, the constraint-based failure assessment of surface cracked plates under biaxial tension loading is presented. As a comparison, the assessment of surface cracked plates under uniaxial tension loading is also presented. The elastic T-stress is used as the constraint parameter. The calculation of the stress intensity factors, T-stresses and limit loads for surface cracks under biaxial/uniaxial loadings are discussed. Failure assessments for typical points along the crack front for surface cracks are conducted. The failure assessment results are compared with available experimental observations.
International Aerospace Abstracts
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Author :
language : en
Publisher:
Release Date : 1996
International Aerospace Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Aeronautics categories.
Deformation And Fracture In Materials
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Author : Anoop Kumar Mukhopadhyay
language : en
Publisher: CRC Press
Release Date : 2024-08-27
Deformation And Fracture In Materials written by Anoop Kumar Mukhopadhyay and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-08-27 with Technology & Engineering categories.
This book provides information on the basics of deformation and fracture in materials and on current, state-of-the-art experimental and numerical/theoretical methods, including data-driven approaches in the deformation and fracture study of materials. The blend of experimental test methods and numerical techniques to study deformation and fracture in materials is discussed. In addition, the application of data-driven approaches in predicting material performance in different types of loading and loading environments is illustrated. Features: Includes clear insights on deformation and fracture in materials, with clear explanations of mechanics and defects relating to them Provides effective treatments of modern numerical simulation methods Explores applications of data-driven approaches such as artificial intelligence, machine learning, and computer vision Reviews simple and basic experimental techniques to understand the concepts of deformation and fracture in materials Details modeling and simulation strategies of mechanics of materials at different scales This book is aimed at researchers and graduate students in fracture mechanics, finite element methods, and materials science.
Government Reports Announcements Index
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Author :
language : en
Publisher:
Release Date : 1993
Government Reports Announcements Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Science categories.
Problems Of Fracture Mechanics And Fatigue
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Author : E.E. Gdoutos
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Problems Of Fracture Mechanics And Fatigue written by E.E. Gdoutos 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 2013-06-29 with Science categories.
On Fracture Mechanics A major objective of engineering design is the determination of the geometry and dimensions of machine or structural elements and the selection of material in such a way that the elements perform their operating function in an efficient, safe and economic manner. For this reason the results of stress analysis are coupled with an appropriate failure criterion. Traditional failure criteria based on maximum stress, strain or energy density cannot adequately explain many structural failures that occurred at stress levels considerably lower than the ultimate strength of the material. On the other hand, experiments performed by Griffith in 1921 on glass fibers led to the conclusion that the strength of real materials is much smaller, typically by two orders of magnitude, than the theoretical strength. The discipline of fracture mechanics has been created in an effort to explain these phenomena. It is based on the realistic assumption that all materials contain crack-like defects from which failure initiates. Defects can exist in a material due to its composition, as second-phase particles, debonds in composites, etc. , they can be introduced into a structure during fabrication, as welds, or can be created during the service life of a component like fatigue, environment-assisted or creep cracks. Fracture mechanics studies the loading-bearing capacity of structures in the presence of initial defects. A dominant crack is usually assumed to exist.
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.