Download or read book Stress Intensity Factors for Corner Cracks in Loaded Holes in Lugs and Wide Plates written by Engineering Sciences Data Unit and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stress intensity Factors for Corner Cracks at the Edge of a Hole written by and published by . This book was released on 1978 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Semielliptical Cracks Along Holes in Plates and Lugs written by Alten F. Grandt and published by . This book was released on 1983 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes a basic research effort directed at characterizing the growth of semielliptical surface cracks embedded along the bore of a hole in a large plate or an attachment lug. Fatigue cracks are grown in transparent polymer test specimens which allow in situ observation of the crack plane. Crack growth was recorded by time lapse photography. Subsequent measurement of the crack photographs gave crack size and shape changes as a function of elapsed cycles. A multidegree of freedom fracture mechanics model was developed to predict the growth of embedded surface and corner cracks located at open holes in plates loaded in remote tension. Crack growth predictions gave excellent agreement for the embedded surface crack plate results obtained under the current effort and also gave good results for corner cracked hole tests conducted under an earlier program.

Download or read book Structural Integrity of Fasteners written by Pir M. Toor and published by ASTM International. This book was released on 2000 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book USAF Damage Tolerant Design Handbook written by and published by . This book was released on 1984 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Semielliptical Cracks Along Holes in Plates and Lugs written by Alten F. Grandt and published by . This book was released on 1983 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes a basic research effort directed at characterizing the growth of semielliptical surface cracks embedded along the bore of a hole in a large plate or an attachment lug. Fatigue cracks are grown in transparent polymer test specimens which allow in situ observation of the crack plane. Crack growth was recorded by time lapse photography. Subsequent measurement of the crack photographs gave crack size and shape changes as a function of elapsed cycles. A multidegree of freedom fracture mechanics model was developed to predict the growth of embedded surface and corner cracks located at open holes in plates loaded in remote tension. Crack growth predictions gave excellent agreement for the embedded surface crack plate results obtained under the current effort and also gave good results for corner cracked hole tests conducted under an earlier program.

Download or read book Stress Intensity Factors for Surface and Corner Cracked Fastener Holes by the Weight Function Method written by W. Zhao and published by . This book was released on 1995 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper presents stress intensity factor solutions for surface and corner-cracked fastener holes by using an efficient and accurate three-dimensional weight function method. The approach is briefly described. Stress intensity factors for crack-face pressure loads of the type (x/r)n are provided, where n varies from 0 to 4. The geometry parameters considered are as follows: the ratio of the hole radius to plate thickness r/T = 1.5 (T = t for corner cracks, T = 2t for surface cracks); the crack aspect ratio a/c = 0.5, 1, and 1.5; the ratio of crack depth-to-plate thickness a/t = 0.1, 0.3, and 0.5. Based on the given solutions and the superposition principle, stress intensity factors for other load cases may be easily obtained. Examples are given for remote tension, biaxial tension, wedge loading in the hole, and simulated pin loading. Also, the effect of the residual stress field following cold expansion is considered for the remote tension loading condition.

Download or read book Design of Fatigue and Fracture Resistant Structures written by and published by ASTM International. This book was released on 1980 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stress intensity Factors for Two Symmetric Corner Cracks written by JC. Newman and published by . This book was released on 1979 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The literature contains several analytical and experimental evaluations of Mode I stress-intensity factors for corner cracks at holes in plates subjected to remote tension, remote bending, or pin loading in the hole. Unfortunately, these solutions give very different stress-intensity factors for the same crack configuration and loading.

Download or read book Stress Intensity Factor for a Corner Crack at the Edge of a Hole in a Plate written by SS. Palusamy and published by . This book was released on 1981 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: A corner-cracked hole in a plate, subjected to remote tension loading, is one of the three benchmark problems identified for the validation of three-dimensional techniques at the workshop held in Battelle Columbus Laboratories. Stress-intensity factor results for the case of circular corner crack obtained by the macroelement technique is presented in this paper. Results for the remote tension loading are compared with those obtained by the boundary-integral equation (BIE) method and three-dimensional finite-element technique based on singular elements.

Download or read book Fracture Mechanics written by D. T. Read and published by ASTM International. This book was released on 1988 with total page 1108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Surface crack Growth written by Walter G. Reuter and published by ASTM International. This book was released on 1990 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the symposium (on title) held in Sparks, Nevada, April 1988. Twenty-two peer-reviewed papers are divided into sections on models and experiments (monotonic loading), and fatigue crack growth. Areas addressed include the differences in constraint for 2-D through-thickness cracks and 3-D surface

Download or read book Stress Intensity Factors for Small Surface and Corner Cracks in Plates written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-10-26 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three-dimensional finite-element and finite-alternating methods were used to obtain the stress-intensity factors for small surface and corner cracked plates subjected to remote tension and bending loads. The crack-depth-to-crack-length ratios (a/c) ranged from 0.2 to 1 and the crack-depth-to-plate-thickness ratios (a/t) ranged from 0.05 to 0.2. The performance of the finite-element alternating method was studied on these crack configurations. A study of the computational effort involved in the finite-element alternating method showed that several crack configurations could be analyzed with a single rectangular mesh idealization, whereas the conventional finite-element method requires a different mesh for each configuration. The stress-intensity factors obtained with the finite-element-alternating method agreed well (within 5 percent) with those calculated from the finite-element method with singularity elements. Raju, I. S. and Atluri, S. N. and Newman, J. C., Jr. Langley Research Center RTOP 505-63-01-05

Download or read book Stress Intensity Factors for Through and Part Through Cracks Originating at Fastener Holes written by RC. Shah and published by . This book was released on 1976 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: A procedure is formulated to derive approximate stress intensity factors for both part-through and through-the-thickness cracks originating at open holes and holes containing either loaded or unloaded close tolerance fasteners. The procedure is checked with known solutions for stress intensity factors of one or two through-the-thickness cracks emanating from an open hole in a plate subjected to uniaxial or biaxial loading. Stress intensity factors computed from this procedure for the above mentioned cases agree within seven percent of known results for the crack length to hole radius ratios, L/r, of 0.05

Download or read book Analysis of Corner Cracks at Hole by a 3 D Weight Function Method with Stresses from Finite Element Method written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-11-03 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stress intensity factors for quarter-elliptical corner cracks emanating from a circular hole are determined using a 3-D weight function method combined with a 3-D finite element method. The 3-D finite element method is used to analyze uncracked configuration and provide stress distribution in the region where crack is to occur. Using this stress distribution as input, the 3-D weight function method is used to determine stress intensity factors. Three different loading conditions, i.e. remote tension, remote bending and wedge loading, are considered for a wide range in geometrical parameters. The significance in using 3-D uncracked stress distribution and the difference between single and double corner cracks are studied. Typical crack opening displacements are also provided. Comparisons are made with solutions available in the literature. Zhao, W. and Newman, J. C., Jr. and Sutton, M. A. and Wu, X. R. and Shivakumar, K. N. Langley Research Center...

Download or read book Analysis of Corner Cracks at Hole by a 3 D Weight Function Method with Stresses from Finite Element Method written by and published by . This book was released on 1995 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stress Intensity Factors for Deep Cracks Emanating from the Corner Formed by a Hole Intersecting a Plate Surface written by JJ. McGowan and published by . This book was released on 1976 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: A technique consisting of a marriage between stress freezing photo-elasticity and a numerical method was used to obtain stress intensity factors for natural cracks emanating from the corner at which a hole intersects a plate surface. Geometries studied were: crack depth to thickness ratios of approximately 0.2, 0.5, and 0.75; crack depth to crack length ratios of approximately 1.0 to 2.0; and crack length to hole radius ratios of about 0.5 to 2.0. All final crack geometries were grown under monotonic loading, and growth was not self similar, with most of the growth occurring through the thickness under remote extension. Stress intensity factors were determined at the intersection of the flaw border (1) with the plate surface (Ks) and (2) with the edge of the hole (KH). Results showed that for the relatively shallow flaws KH ? 1.5 Ks, for the moderately deep flaws KH ? Ks and for the deep flaws KH ? 0.5 Ks, revealing a severe sensitivity of K to flaw geometry. Results were compared with the Bowie theory, and approximate criteria developed by Hall and Finger, and Hsu and Liu. These comparisons showed that these theories significantly overestimated the SIF for moderately deep flaws a/t ? 0.5 at both the plate surface and the hole, but, for shallow flaws, the Hall-Finger theory underestimated the SIF at the hole, and the Bowie theory underestimated the SIF at the surface for deep flaws.