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Line Spring Method Of Stress Intensity Factor Determination For Surface Cracks In Plates Under Arbitrary In Plane Stresses
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Book Synopsis Line Spring Method of Stress-Intensity Factor Determination for Surface Cracks in Plates Under Arbitrary In-Plane Stresses by : CY. Yang
Download or read book Line Spring Method of Stress-Intensity Factor Determination for Surface Cracks in Plates Under Arbitrary In-Plane Stresses written by CY. Yang and published by . This book was released on 1988 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The elastic line spring model is updated to accept arbitrarily distributed loads acting on plates to allow determination of stress-intensity factors of surface cracks under various types of loading, such as thermal stress and residual stress. The governing integral equations are modified, owing to the inclusion of the nonlinear loads. Careful numerical treatment and computer programming can make the analysis very efficient. It has been shown that a 16-point KI-distribution along a crack front can be obtained within 0.025 s (central processing unit) using Cray computer systems, which is at least four orders of magnitude faster than the finite-element analysis of the same problem. The outstanding computational efficiency makes the line spring model practical for many time-dependent fracture analyses in engineering applications.
Book Synopsis Fracture Mechanics, Nineteenth Symposium by : Thomas A. Cruse
Download or read book Fracture Mechanics, Nineteenth Symposium written by Thomas A. Cruse and published by ASTM International. This book was released on 1988 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Line Spring Model and Its A-pplications to Part-through Crack Problems in Plates and Shells by :
Download or read book Line Spring Model and Its A-pplications to Part-through Crack Problems in Plates and Shells written by and published by . This book was released on 1986 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stress Intensity Factor Solutions for Surface Cracks in Flat Plates Subjected to Nonuniform Stresses by : Mettu, SR.
Download or read book Stress Intensity Factor Solutions for Surface Cracks in Flat Plates Subjected to Nonuniform Stresses written by Mettu, SR. and published by . This book was released on 1994 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The case of a surface crack in a flat plate has received a lot of attention from the fracture mechanics community because of its practical applicability as an idealization of a flaw in structures. Among all the solutions available, those of Raju and Newman seem to be the most accepted and cover the widest range of geometric parameters. These solutions are, however, known only for the cases of tensile and bending loads, and include the effect of finite width using an empirical equation. Residual stresses and more complex forms of loading lead to nonlinear stress distributions across the thickness in real structures. Attempts were made by a few researchers to provide solutions for arbitrary loading using the weight-function and other methods, but a comprehensive treatment of these solutions is not available. The objective of the present work is to provide complete solutions including the effect of finite width using direct tabular inter polation of the finite-element results and to demonstrate the accuracy of a weight-function approach for computing stress intensity factors for a cracked plate subject to arbitrary stresses across the thickness. The reference solutions used in the weight-function scheme were obtained using the three-dimensional finite-element method (FEM). The full range of geometric parameters such as the crack-length-to-width ratio 2c/W, the crack-depth-to-thickness ratio a/t, and the aspect ratio a/c was covered so that accurate interpolation and extrapolation could be made for any given geometry. Piecewise cubic Hermite interpolation was used to compute the quantities corresponding to intermediate values of the geometric parameters. The new solution was compared with the earlier Newman-Raju equation. The new solution in tabular form was then used directly in the weight-function method. The stress intensity factor solution developed here was incorporated into the fatigue crack growth program NASA/FLAGRO, which is widely used by the aerospace community.
Download or read book Metals Abstracts written by and published by . This book was released on 1995 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stress Intensity Factors Handbook by : Yukitaka Murakami
Download or read book Stress Intensity Factors Handbook written by Yukitaka Murakami and published by . This book was released on 1987 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASME Technical Papers written by and published by . This book was released on 1985 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Japanese Science and Technology by :
Download or read book Japanese Science and Technology written by and published by . This book was released on 1986 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Review and Assessment of the Stress-Intensity Factors for Surface Cracks by : JC. Newman
Download or read book A Review and Assessment of the Stress-Intensity Factors for Surface Cracks written by JC. Newman and published by . This book was released on 1979 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The stress-intensity factor solutions proposed for a surface crack in a finite plate subjected to uniform tension are reviewed. Fourteen different solutions for the stress-intensity factors are compared. These solutions have been obtained over the past 16 years using approximate analytical methods, experimental methods, and engineering estimates.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1972 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stress Intensity Factors for Surface Cracks in Bending by : AF. Grandt
Download or read book Stress Intensity Factors for Surface Cracks in Bending written by AF. Grandt and published by . This book was released on 1972 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fracture mechanics solutions applicable to surface cracked plates in bending are studied. The flawed plate is modeled as a two-dimensional beam containing a spring to find the stress intensity factor at the point of intersection of a semielliptical surface crack with the free boundary. Results are given for cracks of various shapes and sizes. These findings, along with previous analytical solutions obtained from the literature, are then compared with experimental data. Since it is difficult to measure surface cracks in metals, polymethylmethacrylate, a transparent polymer, was selected for the test material. First, the relation between fatigue crack growth rate and range in stress intensity is calibrated for polymethylmethacrylate. Measured fatigue crack growth rates for surface flaws in bending are then used to calculate experimental values for the stress intensity factor which are compared with theory.
Book Synopsis Stress Intensity Factor for an Elliptical Crack Approaching the Surface of a Plate in Bending by : AS. Kobayashi
Download or read book Stress Intensity Factor for an Elliptical Crack Approaching the Surface of a Plate in Bending written by AS. Kobayashi and published by . This book was released on 1972 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stress intensity factor for an embedded elliptical crack approaching the free surface of a semi-infinite solid and subjected to a linearly varying pressure is presented in a nondimensional form as a function of position around the crack periphery, crack aspect ratio, and crack distance from the free surface. These stress intensity factors are determined numerically using an alternating technique with two solutions. The first solution deals with an elliptical crack subjected to normal loading expressible in a polynominal of x and y. The second solution involves stresses in a half space due to prescribed normal and shear stresses on the surface. Stress intensity factors for an elliptical crack approaching the free surface of a plate subjected to pure bending are then determined. Stress intensity factors for a semi-elliptical surface crack in a plate subjected to pure bending are also estimated for various crack aspect ratios and crack depth to plate thickness ratios.
Download or read book Paper written by and published by . This book was released on 1985 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Science Abstracts written by and published by . This book was released on 1992 with total page 1228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Calculation of Stress Intensity Factors for Cracks in Structural and Mechanical Components Subjected to Complex Stress Fields by : Z. Wu
Download or read book Calculation of Stress Intensity Factors for Cracks in Structural and Mechanical Components Subjected to Complex Stress Fields written by Z. Wu and published by . This book was released on 2004 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the difficulties in using fracture mechanics is in determining stress intensity factors of cracked structural and mechanical components. The cracks are often subjected to complex stress fields induced by external loads and residual stresses resulting from the surface treatment. Both stress fields are characterized by non-uniform distributions, and handbook stress intensity factor solutions are seldom available in such cases. The method presented below is based on the generalized weight function technique enabling the stress intensity factors to be calculated for any Mode I loading applied to a planar semi-elliptical surface crack. The stress intensity factor can be determined at any point on the crack tip contour by using the general weight function. The calculation is carried out by integrating the product of the stress field and the weight function over the crack area.
