A Fracture Criterion for Three-Dimensional Crack Problems PDF Download
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Author: G. C. Sih
Publisher:
ISBN:
Category :
Languages : en
Pages : 59
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Book Description
A criterion for predicting the growth of three-dimensional cracks is developed on the basis of the strain energy density concept which has been used successfully for treating two-dimensional crack problems. An example of failure prediction for an embedded elliptical crack subjected to both normal and shear loads is presented. (Modified author abstract).
Author: G. C. Sih
Publisher:
ISBN:
Category :
Languages : en
Pages : 59
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Book Description
A criterion for predicting the growth of three-dimensional cracks is developed on the basis of the strain energy density concept which has been used successfully for treating two-dimensional crack problems. An example of failure prediction for an embedded elliptical crack subjected to both normal and shear loads is presented. (Modified author abstract).
Author: M.K. Kassir
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 516
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Book Description
Author: E.E. Gdoutos
Publisher: Springer Science & Business Media
ISBN: 9400961898
Category : Science
Languages : en
Pages : 214
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Book Description
This is not just another book on fracture mechanics. In recent years, there have been many books published on this subject in an attempt to assess the state of the art and its applications. The majority of the work dealt with energy release rate or critical stress intensity factor and is applicable only to fracture toughness testing. The main reason for this restriction is that the energy release concept cannot easily be extended to mixed mode fracture that occurs in practice as the rule rather than the exception. Cracks will normally curve or turn because the direction of loading can change as a function of time. Their directions of growth cannot be assumed as an a priori and must be determined from a pre-assumed criterion. Analysts are still perplexed with selecting an appropriate fracture criterion because it requires much discernment and judgement. Criteria which often appeared valid for idealized situations are quickly dis credited when encountering more complex physical phenomena. Moreover, the claim of generality cannot be justified on the basis of agreement between theory and experiment for a few simple examples.
Author: Emmanuel Gdoutos
Publisher: Springer
ISBN: 9789400961906
Category : Science
Languages : en
Pages : 204
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Book Description
This is not just another book on fracture mechanics. In recent years, there have been many books published on this subject in an attempt to assess the state of the art and its applications. The majority of the work dealt with energy release rate or critical stress intensity factor and is applicable only to fracture toughness testing. The main reason for this restriction is that the energy release concept cannot easily be extended to mixed mode fracture that occurs in practice as the rule rather than the exception. Cracks will normally curve or turn because the direction of loading can change as a function of time. Their directions of growth cannot be assumed as an a priori and must be determined from a pre-assumed criterion. Analysts are still perplexed with selecting an appropriate fracture criterion because it requires much discernment and judgement. Criteria which often appeared valid for idealized situations are quickly dis credited when encountering more complex physical phenomena. Moreover, the claim of generality cannot be justified on the basis of agreement between theory and experiment for a few simple examples.
Author: George C. Sih
Publisher: Springer Science & Business Media
ISBN: 940113734X
Category : Science
Languages : en
Pages : 429
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Book Description
The assessment of crack initiation and/or propagation has been the subject of many past discussions on fracture mechanics. Depending on how the chosen failure criterion is combined with the solution of a particular theory of continuum mechanics, the outcome could vary over a wide range. Mod elling of the material damage process could be elusive if the scale level of observation is left undefined. The specification of physical dimension alone is not sufficient because time and temperature also play an intimate role. It is only when the latter two variables are fixed that failure predictions can be simplified. The sudden fracture of material with a pre-existing crack is a case in point. Barring changes in the local temperature,* the energy released to create a unit surface area of an existing crack can be obtained by considering the change in elastic energy of the system before and after crack extension. Such a quantity has been referred to as the critical energy release rate, G e, or stress intensity factor, K Ie. Other parameters, such as the crack opening displacement (COD), path-independent J-integral, etc. , have been proposed; their relation to the fracture process is also based on the energy release concept. These one-parameter approaches, however, are unable simultaneously to account for the failure process of crack initiation, propagation and onset of rapid fracture. A review on the use of G, K I, COD, J, etc. , has been made by Sih [1,2].
Author: G. C. Sih
Publisher:
ISBN:
Category :
Languages : en
Pages : 62
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Book Description
Finite element procedures are used to solve two- and three-dimensional problems of cracks in elastic bodies. The two-dimensional, plane strain analysis is concerned with the effect of a crack approaching a free edge at right angles. The strain energy density fracture criterion is used to determine the direction of fracture for various distances from the crack tip to thr free edge. These results provide a possible mechanism for the creation of the shear lip region in a plate of finite thickness. The three-dimensional isoparametric finite element procedure is specialized for application to crack problems by the introduction of elements which model the crack edge singularity. The finite element approach is used to study the problem of a through crack in a finite thickness plate subject to symmetric loading. Variations of the stress intensity factor, near field stress components, and strain energy density through the plate thickness are reported.
Author: G. P. Sendeckyj
Publisher: ASTM International
ISBN: 9780803103665
Category : Technology & Engineering
Languages : en
Pages : 248
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Book Description
Author: Huy Duong Bui
Publisher: Springer Science & Business Media
ISBN: 1402048378
Category : Science
Languages : en
Pages : 395
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Book Description
This book presents, in a unified manner, a variety of topics in Continuum and Fracture Mechanics: energy methods, conservation laws, mathematical methods to solve two-dimensional and three-dimensional crack problems. Moreover, a series of new subjects is presented in a straightforward manner, accessible to under-graduate students. Emphasizing physical or experimental back-grounds, then analysis and theoretical results, this monograph is intended for use by students and researchers in solid mechanics, mechanical engineering and applied mathematics.
Author: George C. Sih
Publisher: Springer
ISBN: 9789028604148
Category : Science
Languages : en
Pages : 0
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Book Description
Author: Chin-Teh Sun
Publisher: Academic Press
ISBN: 0123850010
Category : Technology & Engineering
Languages : en
Pages : 337
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Book Description
From a leading expert in fracture mechanics, this text provides new approaches and new applications to advance the understanding of crack formation and propagation.
