Determination of Stress Intensity Factors for Three Dimensional Crack Problems with Differential Stiffness Method PDF Download
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Author: Zhen Ning Song
Publisher:
ISBN:
Category :
Languages : en
Pages : 316
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Author: Zhen Ning Song
Publisher:
ISBN:
Category :
Languages : en
Pages : 316
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Author: J. C. Newman
Publisher:
ISBN:
Category :
Languages : en
Pages : 98
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Author: R. Jones
Publisher:
ISBN: 9780642900456
Category : Airplanes
Languages : en
Pages : 22
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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.
Author: Yaoming Mi
Publisher: Computational Mechanics
ISBN:
Category : Nature
Languages : en
Pages : 208
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 56
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Author: Robert Joseph Sanford
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 688
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Topics in this volume include: Westergaard stress functions for severe periodic crack problems; the stress intensity factors and crack profiles for centre and edge cracks in plates subject to arbitrary stesses; and central crack in plane ortotropic rectangular sheet.
Author: George C. Sih
Publisher: Springer Science & Business Media
ISBN: 9789001798604
Category : Science
Languages : en
Pages : 578
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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:
Publisher:
ISBN:
Category :
Languages : en
Pages : 36
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
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