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Author : J. R. Rice
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (48 download)
Download or read book Elastic Plastic Analysis of Growing Cracks written by J. R. Rice and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elastic Plastic Analysis of Growing Cracks written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The elastic--plastic stress and deformation fields at the tip of a crack which grows in an ideally plastic solid under plane strain, shows small scale yielding conditions. Results of an asymptotic analysis suggests the existence of a crack tip stress state similar to that of the classical Prandtl field, but containing a zone of elastic unloading between the centered fan region and the trailing constant stress plastic region. The near tip expression for the rate of opening displacement delta at distance r from the growing tip is found to have the form delta-. = .cap alpha. J-.?sub o/ + .beta.(sigma/sub o//E) a-. ln(R/r) but the presence of the elastic wedge causes .beta. to have the revised value of 5.08 (for Poisson ratio .nu. = 0.3); also, (a = crack length, sigma/sub o/ = yield strength, E = elastic modulus, and J denotes the far-field value), and (1-.nu.2)K2/E for the small scale yielding conditions considered. The parameters .cap alpha. and R cannot be determined from the asymptotic analysis, but comparisons with finite element solutions suggest that, for small amounts of growth, .cap alpha. is approximately the same for stationary and growing cracks, and R scales approximately with the size of the plastic zone, being about 15% to 30% larger. For large scale yielding, a similar form applies with possible variations in .cap alpha. and .beta., in cases which maintain triaxial constraint at the crack tip. In the fully yielded case R is expected to be proportional to the dimension of the uncracked ligament. Model crack growth criterion requiring a critical delta at some fixed r from the tip, is re-examined in light of the more accurate solution. Results suggest that the J versus .delta.a relation describing growth is dependent on the extent of yielding. It is suggested that this dependency might be small for highly ductile materials, provided that a similar triaxial constraint is maintained in all cases.
Author : J. R. Rice
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (48 download)
Download or read book Elastic Plastic Analysis of Growing Cracks written by J. R. Rice and published by . This book was released on 1979 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Satya N. Atluri
Publisher :
ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.:/5 (227 download)
Download or read book Finite Element Elastic-Plastic Analysis of Cracks written by Satya N. Atluri and published by . This book was released on 1978 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a summary of research performed in the areas: (a) development of two-dimensional hybrid finite element procedures to calculate stress intensity factors corresponding to general r to the minus alpha stress singularities in isotropic as well as anistropic materials; (b) study of the convergence of the assumed displacement hybrid finite element procedure in fracture mechanics problems; (c) development of a three-dimensional hybrid finite element procedure to calculate the elastic combined mode stress-intensity factors K1, K2 and K3 that vary along an arbitrarily curved three-dimensional crack front; (d) hybrid finite element solutions of fundamental three-dimensional crack problems; (e) development of a two-dimensional finite element procedure for analyzing plane problems of fracture involving large-scale yielding conditions and under cyclic loading; (f) study of the J-integral as a ductile fracture initiation condition; (g) studies of finite deformation effects near the crack-tip; (h) analysis of stable crack growth under rising load and study of criteria for loss of stability of growth in ductile materials; and (i) elastic-plastic analysis of effects of crack closure on fatigue crack growth rates. (Author).
Author :
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (228 download)
Download or read book Elastic-Plastic Fracture Mechanics Analysis of Small Cracks written by and published by . This book was released on 1982 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: For many materials the fracture strength and fatigue lifetime is controlled by small cracks that can grow at sizes and applied stress levels which are below those predicted from data for long cracks. The objective of this paper is to describe how elastic-plastic fracture mechanics analysis can be used to interpret small crack behavior. The results of the elastic-plastic analysis indicate that deviations from LEFM begin at about 0.7 of the yield stress and that the trend of the small crack data can be predicted. The results of 3-D elastic-plastic analysis of a surface crack show a unique variation of the crack driving force along the crack front. This information is used to predict crack shapes during cyclic crack growth.
Author : Valery N. Shlyannikov
Publisher : Springer Science & Business Media
ISBN 13 : 3540458360
Total Pages : 255 pages
Book Rating : 4.5/5 (44 download)
Download or read book Elastic-Plastic Mixed-Mode Fracture Criteria and Parameters written by Valery N. Shlyannikov and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: My wife Tatyana, daughter Mariya, son Alexandr It is well known that the mixed-mode conditions appear when the direction of the applied loading does not coincide with the orthogonal K,-Kn-Km space. In general, in the industrial practice the mixed-mode fracture and the mixed-mode crack growth are more likely to be considered the rule than the exception. Miller et al. considers that cracks can grow due to a mixture of processes (ductile and brittle), mechanisms (static, fatigue, creep) and loading modes (tension, torsion, biax ial/multiaxial). Additionally mixed-mode crack-extension can be affected by many other considerations such as artifact geometry (thin plates, thick shells, and the size, shape and orientation of the defect), environmental effects (temperature, gaseous and liquid surroundings), material state (crystallographic structure, heat treatment and route of manufacture) and stress conditions (out-of-phase and ran dom loading effects). The main feature of the mixed-mode fracture is that the crack growth would no longer take place in a self-similar manner and does not follow a universal trajec tory that is it will grow on a curvilinear path. There are various fracture criteria, which predict the behavior of cracks in brittle and ductile materials loaded in combined modes. Linear elastic fracture mechanics (LEFM) criteria predict basi cally the same direction for crack propagation. Cracks in brittle materials have been shown to propagate normal to the maximum tangential stress. In ductile ma terials yielding occurs at the crack tip and LEFM is no longer applicable.
Author :
Publisher : ASTM International
ISBN 13 :
Total Pages : 766 pages
Book Rating : 4./5 ( download)
Download or read book Elastic-plastic Fracture: Second Symposium, Volume I- Inelastic Crack Analysis written by and published by ASTM International. This book was released on 1983 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 782 pages
Book Rating : 4.3/5 (91 download)
Download or read book Elastic-plastic Fracture: Inelastic crack analysis written by and published by . This book was released on 1983 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yafang Miao
Publisher :
ISBN 13 :
Total Pages : 336 pages
Book Rating : 4.:/5 (89 download)
Download or read book Asymptotic Analysis of Near-tip Stress and Deformation Fields for Cracks in Porous Elastic Plastic Materials written by Yafang Miao and published by . This book was released on 1993 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. Craig McClung
Publisher :
ISBN 13 :
Total Pages : 490 pages
Book Rating : 4.:/5 (317 download)
Download or read book Development of a Practical Methodology for Elastic-Plastic and Fully Plastic Fatigue Crack Growth written by R. Craig McClung and published by . This book was released on 1999 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stanley Tung-tseng Chiu
Publisher :
ISBN 13 :
Total Pages : 214 pages
Book Rating : 4.:/5 (228 download)
Download or read book Elastic-plastic Analysis in the Vicinity of Crack Tip written by Stanley Tung-tseng Chiu and published by . This book was released on 1967 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722903398
Total Pages : 34 pages
Book Rating : 4.9/5 (33 download)
Download or read book Three-Dimensional Elastic-Plastic Analysis of Shallow Cracks in Single-Edge-Crack-Tension Specimens written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-13 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three dimensional, elastic-plastic, finite element results are presented for single-edge crack-tension specimens with several shallow crack-length-to-width ratios (0.05 less than or equal to a/W less than or equal to 0.5). Results showed the need to model the initial yield plateau in the stress-strain behavior to accurately model deformation of the A36 steel specimens. The crack-tip-opening-displacement was found to be linearly proportional to the crack-mouth-opening displacement. A new deformation dependent plastic-eta factor equation is presented for calculating the J-integral from test load-displacement records. This equation was shown to be accurate for all crack lengths considered. Shivakumar, Kunigal N. and Newman, James C., Jr. Langley Research Center RTOP 505-63-01-05...
Author :
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.:/5 (317 download)
Download or read book Three-dimensional Elastic-plastic Analysis of Shallow Cracks in Single-edge-crack-tension Specimens written by and published by . This book was released on 1990 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert Joseph Firmature
Publisher :
ISBN 13 :
Total Pages : 380 pages
Book Rating : 4.:/5 (412 download)
Download or read book Elastic-plastic Analysis of Off-centered Cracks in Cylindrical Structures written by Robert Joseph Firmature and published by . This book was released on 1998 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Charles Samuel White
Publisher :
ISBN 13 :
Total Pages : 208 pages
Book Rating : 4.:/5 (946 download)
Download or read book Elastic-plastic Analysis of Surface Cracks written by Charles Samuel White and published by . This book was released on 1982 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Huang Yuan
Publisher : Springer Science & Business Media
ISBN 13 : 3540458824
Total Pages : 318 pages
Book Rating : 4.5/5 (44 download)
Download or read book Numerical Assessments of Cracks in Elastic-Plastic Materials written by Huang Yuan and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Author : Chin-tun Kuo
Publisher :
ISBN 13 :
Total Pages : 70 pages
Book Rating : 4.:/5 (228 download)
Download or read book Elastic-plastic Analysis in the Vicinity of a Crack Tip written by Chin-tun Kuo and published by . This book was released on 1963 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
