Analysis of Two-dimensional Fracture Mechanics Problems Using the Finite Element Method PDF Download

Author: Barry James Simon
Publisher:
ISBN:
Category : Strains and stresses
Languages : en
Pages : 80

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Author: J. B. Min
Publisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 28

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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781725162495
Category :
Languages : en
Pages : 38

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A comparison of the finite element method (FEM) and boundary element method (BEM) for the solution of two-dimensional plane strain problems in fracture mechanics is presented in this paper. Stress intensity factors (SIF's) were calculated using both methods for elastic plates with either a single-edge crack or an inclined-edge crack. In particular, two currently available programs, ANSYS for finite element analysis and BEASY for boundary element analysis, were used. Min, J. B. and Steeve, B. E. and Swanson, G. R. Marshall Space Flight Center NASA-TP-3277, M-695, NAS 1.60:3277 ...

Author: A. S. Kobayashi
Publisher:
ISBN:
Category :
Languages : en
Pages : 24

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The method of direct stiffness is used to determine stress intensity factors for two-dimensional fracture mechanic problems of practical interest. For most problems, the crack opening displacement about three nodal positions away from the crack tip was used to determine the stress intensity factor within a projected accuracy of plus or minus 5%. The requirement of extremely small finite elements in the vicinity of the crack tip is circumvented and the amount of computational effort is reduced. Stress intensity factors obtained by this method include the double cantilever specimen, notched cylinder with internal pressure, edge-notched square plate with prescribed edge displacements, and the tension plate with slanted cracks. (Author).

Author: Peter D. Hilton
Publisher:
ISBN:
Category : Finite element method
Languages : en
Pages : 119

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Improved methods for calculating fracture mechanics parameters at critical fatigue and fracture prone areas of complex structural details are summarized. This work is a part of a broader effort aimed at the development of analytical methods for fatigue and fracture analysis of submarine hulls. An approach based on the combination of high order isoparametric finite elements with a singular crack tip element is described and applied to the prediction of elastic stress intensity factor for Mode I or combined Modes I and II crack behavior. Examples of the application of the methods to two-dimensional and axisymmetric problems are presented along with recommendations for future studies and applications.

Author: T.A. Cruse
Publisher: Springer Science & Business Media
ISBN: 9400913850
Category : Science
Languages : en
Pages : 171

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The Boundary Integral Equation (BIE) method has occupied me to various degrees for the past twenty-two years. The attraction of BIE analysis has been its unique combination of mathematics and practical application. The EIE method is unforgiving in its requirement for mathe matical care and its requirement for diligence in creating effective numerical algorithms. The EIE method has the ability to provide critical inSight into the mathematics that underlie one of the most powerful and useful modeling approximations ever devised--elasticity. The method has even revealed important new insights into the nature of crack tip plastic strain distributions. I believe that EIE modeling of physical problems is one of the remaining opportunities for challenging and fruitful research by those willing to apply sound mathematical discipline coupled with phys ical insight and a desire to relate the two in new ways. The monograph that follows is the summation of many of the successes of that twenty-two years, supported by the ideas and synergisms that come from working with individuals who share a common interest in engineering mathematics and their application. The focus of the monograph is on the application of EIE modeling to one of the most important of the solid mechanics disciplines--fracture mechanics. The monograph is not a trea tise on fracture mechanics, as there are many others who are far more qualified than I to expound on that topic.

Author: Antonio A. Munjiza
Publisher: John Wiley & Sons
ISBN: 0470020172
Category : Technology & Engineering
Languages : en
Pages : 348

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The combined finite discrete element method is a relatively new computational tool aimed at problems involving static and / or dynamic behaviour of systems involving a large number of solid deformable bodies. Such problems include fragmentation using explosives (e.g rock blasting), impacts, demolition (collapsing buildings), blast loads, digging and loading processes, and powder technology. The combined finite-discrete element method - a natural extension of both discrete and finite element methods - allows researchers to model problems involving the deformability of either one solid body, a large number of bodies, or a solid body which fragments (e.g. in rock blasting applications a more or less intact rock mass is transformed into a pile of solid rock fragments of different sizes, which interact with each other). The topic is gaining in importance, and is at the forefront of some of the current efforts in computational modeling of the failure of solids. * Accompanying source codes plus input and output files available on the Internet * Important applications such as mining engineering, rock blasting and petroleum engineering * Includes practical examples of applications areas Essential reading for postgraduates, researchers and software engineers working in mechanical engineering.

Author: 劉國楨
Publisher:
ISBN: 9781374686557
Category :
Languages : en
Pages :

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This dissertation, "A Conic-section Simulation Analysis of Two-dimensional Fracture Problems Using Finite Element Method" by 劉國楨, Kwok-jing, Lau, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b4212760 Subjects: Metals - Fracture

Author: L. Nash Gifford (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 79

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Computer program APES utilizes a high order isoparametric finite element and two different singular crack tip elements. It can treat elastic axisymmetric, plane strain, or plane stress problems and is particularly valuable for stress concentration problems and linear fracture mechanics applications. The behavior characteristics of the finite elements are given, and abundance of case studies are included, and detailed preparation of input data is described. Thus the report will enable the designer/analyst to immediately put the program to practical use. It is shown that accurate stress intensity factors for cracked structures under combined Modes I and II loading conditions are calculated directly and need not be inferred later. The manpower associated with finite element analysis is reduced by an order of magnitude, and the accuracy of the method is significantly increased. It is demonstrated that elastic planar and axisymmetric stress and fracture mechanics analysis can now be performed quickly, inexpensively, and very accurately for highly complex structures in a manner that is appealingly simple. This work has direct application to fatigue and fracture problems in which the behavior of full-scale structural details is predicted on the basis of the behavior of simple, controlled laboratory specimens. (Author).

Author: Meinhard Kuna
Publisher: Springer Science & Business Media
ISBN: 9400766807
Category : Science
Languages : en
Pages : 464

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Book Description
Fracture mechanics has established itself as an important discipline of growing interest to those working to assess the safety, reliability and service life of engineering structures and materials. In order to calculate the loading situation at cracks and defects, nowadays numerical techniques like finite element method (FEM) have become indispensable tools for a broad range of applications. The present monograph provides an introduction to the essential concepts of fracture mechanics, its main goal being to procure the special techniques for FEM analysis of crack problems, which have to date only been mastered by experts. All kinds of static, dynamic and fatigue fracture problems are treated in two- and three-dimensional elastic and plastic structural components. The usage of the various solution techniques is demonstrated by means of sample problems selected from practical engineering case studies. The primary target group includes graduate students, researchers in academia and engineers in practice.