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| Author | : George C. Sih |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 562 |
| Release | : 2013-11-11 |
| Genre | : Science |
| ISBN | : 9401722609 |
Download Methods of Analysis and Solutions of Crack Problems Book in PDF, ePub and Kindle
It is weH known that the traditional failure criteria cannot adequately explain failures which occur at a nominal stress level considerably lower than the ultimate strength of the material. The current procedure for predicting the safe loads or safe useful life of a structural member has been evolved around the discipline oflinear fracture mechanics. This approach introduces the concept of a crack extension force which can be used to rank materials in some order of fracture resistance. The idea is to determine the largest crack that a material will tolerate without failure. Laboratory methods for characterizing the fracture toughness of many engineering materials are now available. While these test data are useful for providing some rough guidance in the choice of materials, it is not clear how they could be used in the design of a structure. The understanding of the relationship between laboratory tests and fracture design of structures is, to say the least, deficient. Fracture mechanics is presently at astandstill until the basic problems of scaling from laboratory models to fuH size structures and mixed mode crack propagation are resolved. The answers to these questions require some basic understanding ofthe theory and will not be found by testing more specimens. The current theory of fracture is inadequate for many reasons. First of aH it can only treat idealized problems where the applied load must be directed normal to the crack plane.
| Author | : g. c. m Sih |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 1973 |
| Genre | : |
| ISBN | : |
Download Methods of Analysis and Solution of Crack Problems : Recent Developments in Fracture Mechanics, Theory and Methods of Solving Crack Problems Book in PDF, ePub and Kindle
| Author | : D.A. Hills |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 314 |
| Release | : 2013-04-17 |
| Genre | : Science |
| ISBN | : 9401586489 |
Download Solution of Crack Problems Book in PDF, ePub and Kindle
This book is concerned with the numerical solution of crack problems. The techniques to be developed are particularly appropriate when cracks are relatively short, and are growing in the neighbourhood of some stress raising feature, causing a relatively steep stress gradient. It is therefore practicable to represent the geometry in an idealised way, so that a precise solution may be obtained. This contrasts with, say, the finite element method in which the geometry is modelled exactly, but the subsequent solution is approximate, and computationally more taxing. The family of techniques presented in this book, based loosely on the pioneering work of Eshelby in the late 1950's, and developed by Erdogan, Keer, Mura and many others cited in the text, present an attractive alternative. The basic idea is to use the superposition of the stress field present in the unfiawed body, together with an unknown distribution of 'strain nuclei' (in this book, the strain nucleus employed is the dislocation), chosen so that the crack faces become traction-free. The solution used for the stress field for the nucleus is chosen so that other boundary conditions are satisfied. The technique is therefore efficient, and may be used to model the evolution of a developing crack in two or three dimensions. Solution techniques are described in some detail, and the book should be readily accessible to most engineers, whilst preserving the rigour demanded by the researcher who wishes to develop the method itself.
| Author | : Bogdan Rogowski |
| Publisher | : |
| Total Pages | : 308 |
| Release | : 2015-06-13 |
| Genre | : |
| ISBN | : 9783659713835 |
Download Fracture Mechanics of Multifield Materials Book in PDF, ePub and Kindle
| Author | : Bogdan Rogowski |
| Publisher | : |
| Total Pages | : 430 |
| Release | : 2014 |
| Genre | : |
| ISBN | : 9788372835949 |
Download Fracture Mechanics of Anisotropic Bodies Book in PDF, ePub and Kindle
| Author | : A. M. Khludnev |
| Publisher | : Computational Mechanics |
| Total Pages | : 416 |
| Release | : 2000 |
| Genre | : Technology & Engineering |
| ISBN | : |
Download Analysis of Cracks in Solids Book in PDF, ePub and Kindle
The need for progress in modelling and analysis of crack problems in solids has resulted in renewed attempts at using modern approaches to boundary value problems. By taking a different viewpoint on the traditional treatment of many problems, such as crack theory, the range that can be resolved through mathematical tools is enlarged. This book provides a fresh outlook on crack problems, displaying new methods of studying these and proposing new models for cracks in elastic and nonelastic bodies satisfying physically suitable nonpenetration conditions between crack faces. Two- and three-dimensional bodies, plates and shells with cracks are considered. Properties of solutions such as existence of solutions, regularity up to the crack faces, and convergence of solutions as parameters of a system are varying are established, while different constitutive laws such as elastic, thermoelastic and elastoplastic are also analysed. The new approach presented by the authors is intriguing because it fails to lead to violation of physical properties. In addition, the boundary conditions analysed are given in the form of inequalities, and are properly nonpenetration conditions of crack faces. Thi
| Author | : George C. Sih |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 410 |
| Release | : 1977-03-31 |
| Genre | : Science |
| ISBN | : 9789028601567 |
Download Elastodynamic Crack Problems Book in PDF, ePub and Kindle
| Author | : Y. Z. Chen |
| Publisher | : Wit Pr/Computational Mechanics |
| Total Pages | : 336 |
| Release | : 2003-01 |
| Genre | : Technology & Engineering |
| ISBN | : 9781853129032 |
Download Multiple Crack Problems in Elasticity Book in PDF, ePub and Kindle
The authors investigate various integral equations for multiple crack problems in plane elasticity. Formulation of the problems is based on relevant elementary solutions in which the complex variable function method is used.
| Author | : George C. Sih |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 344 |
| Release | : 2012-12-06 |
| Genre | : Science |
| ISBN | : 940101292X |
Download Plates and shells with cracks Book in PDF, ePub and Kindle
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.
| Author | : Zihai Shi |
| Publisher | : Butterworth-Heinemann |
| Total Pages | : 342 |
| Release | : 2009-06-17 |
| Genre | : Technology & Engineering |
| ISBN | : 0080942229 |
Download Crack Analysis in Structural Concrete Book in PDF, ePub and Kindle
This new book on the fracture mechanics of concrete focuses on the latest developments in computational theories, and how to apply those theories to solve real engineering problems. Zihai Shi uses his extensive research experience to present detailed examination of multiple-crack analysis and mixed-mode fracture.Compared with other mature engineering disciplines, fracture mechanics of concrete is still a developing field with extensive new research and development. In recent years many different models and applications have been proposed for crack analysis; the author assesses these in turn, identifying their limitations and offering a detailed treatment of those which have been proved to be robust by comprehensive use. After introducing stress singularity in numerical modelling and some basic modelling techniques, the Extended Fictitious Crack Model (EFCM) for multiple-crack analysis is explained with numerical application examples. This theoretical model is then applied to study two important issues in fracture mechanics - crack interaction and localization, and fracture modes and maximum loads. The EFCM is then reformulated to include the shear transfer mechanism on crack surfaces and the method is used to study experimental problems. With a carefully balanced mixture of theory, experiment and application, Crack Analysis in Structural Concrete is an important contribution to this fast-developing field of structural analysis in concrete. Latest theoretical models analysed and tested Detailed assessment of multiple crack analysis and multi-mode fractures Applications designed for solving real-life engineering problems
