A Special Crack Tip Element For Three Dimensional Crack Problems
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A Special Crack Tip Element For Three Dimensional Crack Problems
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Author : R. Jones
language : en
Publisher:
Release Date : 1978
A Special Crack Tip Element For Three Dimensional Crack Problems written by R. Jones and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Airplanes categories.
This paper develops a finite element method for determining the stress intensity factors along the edge of a crack in an arbitrary three-dimensional body. A special element is placed around the crack front and in each special element the stresses and displacements are derived using the asymptotic nature of the stress and displacement fields near a crack tip. The method is based on the authors' previous technique for evaluating the stress intensity factors in cracked sheets, and coincides with this method in the case of a through crack in a thin sheet. As illustrative examples the problems of a semicircular surface flaw and an internal penny shaped crack are considered. In each case the computed values of the stress intensity factors are in excellent agreement with known analytical results.
Three Dimensional Analysis Of Crack Growth
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Author : Yaoming Mi
language : en
Publisher: Computational Mechanics
Release Date : 1996
Three Dimensional Analysis Of Crack Growth written by Yaoming Mi and has been published by Computational Mechanics this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Nature categories.
Stress Intensity Factors Along Three Dimensional Elliptical Crack Fronts
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Author : M. Gosz
language : en
Publisher:
Release Date : 1998
Stress Intensity Factors Along Three Dimensional Elliptical Crack Fronts written by M. Gosz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Airplanes categories.
The objective of the present investigation is to determine the mode I stress-intensity factors along two symmetric surface cracks emanating from a centrally located hole in a rectangular plate (the so-called Round Robin Problem) using the domain integral method. In order to validate the present three-dimensional domain integral implementation, two comparisons were made with benchmark solutions. We first considered the problem of an elliptical crack embedded in a rectangular plate. For plate dimensions much greater than the largest characteristic dimension of the elliptical crack, we compared the present finite element results with the solution of Irwin (1962) for an elliptical crack embedded in an infinitely extended solid. Next, we considered the problem of a quarter-elliptical comer crack in a rectangular, plate and compared the results with those of Newman and Raju (1983). Excellent agreement was obtained for both benchmark comparisons.
The Virtual Crack Closure Technique History Approach And Applications
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Author : Ronald Krueger
language : en
Publisher:
Release Date : 2002
The Virtual Crack Closure Technique History Approach And Applications written by Ronald Krueger and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
An overview of the virtual crack closure technique is presented. The approach used is discussed, the history summarized, and insight into its applications provided. Equations for two-dimensional quadrilateral elements with linear and quadratic shape functions are given. Formula for applying the technique in conjuction with three-dimensional solid elements as well as plate/shell elements are also provided. Necessary modifications for the use of the method with geometrically nonlinear finite element analysis and corrections required for elements at the crack tip with different lengths and widths are discussed. The problems associated with cracks or delaminations propagating between different materials are mentioned briefly, as well as a strategy to minimize these problems. Due to an increased interest in using a fracture mechanics based approach to assess the damage tolerance of composite structures in the design phase and during certification, the engineering problems selected as examples and given as references focus on the application of the technique to components made of composite materials.
Three Dimensional Crack Analysis By Finite Element Method With Boundary Integral Method At Crack Tip
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Author : Tae Moon Kim
language : en
Publisher:
Release Date : 1985
Three Dimensional Crack Analysis By Finite Element Method With Boundary Integral Method At Crack Tip written by Tae Moon Kim and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Cracking process categories.
Linear And Nonlinear Crack Growth Using Boundary Elements
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Author : Adrián Cisilino
language : en
Publisher: Computational Mechanics
Release Date : 2000
Linear And Nonlinear Crack Growth Using Boundary Elements written by Adrián Cisilino and has been published by Computational Mechanics this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Mathematics categories.
This text provides a three dimensional Boundary Element Method for the analysis of fatigue crack problems in both linear and nonlinear fracture mechanics. Special attention is devoted to the use of singular and near-singular integrals.
Three Dimensional Finite Element Analysis Of Cyclic Fatigue Crack Growth Of Multiple Surface Flaws
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Author : Corneliu Manu
language : en
Publisher:
Release Date : 1980
Three Dimensional Finite Element Analysis Of Cyclic Fatigue Crack Growth Of Multiple Surface Flaws written by Corneliu Manu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Finite element method categories.
Numerical Assessments Of Cracks In Elastic Plastic Materials
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Author : Huang Yuan
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-11
Numerical Assessments Of Cracks In Elastic Plastic Materials written by Huang Yuan 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 2013-11-11 with Science categories.
In this book a systematic discussion of crack problems in elastic-plastic materials is presented. The state of the art in fracture mechanics research and assessment of cracks is documented, with the help of analytic, asymptotic methods as well as finite element computations. After a brief introduction to fracture mechanics, the two-parameter concept for stationary cracks is studied in addition to the issues in three-dimensional crack fields under coupling with strong out-of-plane effects. Cracks along interfaces and crack growth problems under mixed mode conditions are also treated. A systematic study of stress singularities for different notches is accompanied by detailed finite element computations.
Three Dimensional Finite Element Study Of An Elastic Plastic Crack Tip
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Author : Tumkur Sarveswaraiah Dayananda
language : en
Publisher:
Release Date : 1992
Three Dimensional Finite Element Study Of An Elastic Plastic Crack Tip written by Tumkur Sarveswaraiah Dayananda and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Plates And Shells With Cracks
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Author : George C. Sih
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Plates And Shells With Cracks written by George C. Sih 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.
This third volume of a series on Mechanies of Fraeture deals with eraeks in plates and shelIs. It was noted in Volume 2 on three-dimensional eraek problems that additional free surfaees can lead to substantial mathematical complexities, often making the analysis unmanageable. The theory of plates and shelIs forms a part of the theory of elasticity in which eertain physieal assumptions are made on the basis that the distanee between two bounded surfaees, either fiat or eurved, is small in eomparison with the overall dimen sions of the body. In modern times, the broad and frequent applieations of plate- and shell-like struetural members have aeted as a stimulus to whieh engineers and researchers in the field of fracture meehanies have responded with a wide variety of solutions of teehnieal importanee. These eontributions are covered in this book so that the reader may gain an understanding of how analytieal treat me nt s ofplates and shells containing initial imperfeetions in the form of eraeks are earried out. The development of plate and shell theories has involved long standing controversy on the eonsisteney of omitting eertain small terms and at the same time retaining others of the same order of magnitude. This defieieney depends on the ratio of the plate or shell thiekness, h, to other eharaeteristie dimensions and eannot be eompletely resolved in view of the approximations inherent in the transverse dependence of the extensional and bending stresses.