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Effect Of Mean Stress Intensity On Fatigue Crack Growth In A 5456 H117 Aluminum Alloy
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Book Synopsis Effect of Mean Stress Intensity on Fatigue Crack Growth in a 5456-H117 Aluminum Alloy by :
Download or read book Effect of Mean Stress Intensity on Fatigue Crack Growth in a 5456-H117 Aluminum Alloy written by and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue crack growth data on a 5456-H117 aluminum alloy was obtained by testing compact tension and contoured double cantilever beam specimens. The effect of tensile mean stress on crack growth rate is found to reach a maximum when stress ratio R> or = 0.25. The crack propagation laws are discussed, and two new equations are developed. It is shown that the new equations can represent the entire range of fatigue crack growth rate, versus applied stress intensity for different R values from threshold behavior to unstable fracture. (Modified author abstract).
Book Synopsis Effect of Mean Stress Intensity on Fatigue Crack Growth in a 5456-H117 Aluminum Alloy by : H. P. Chu
Download or read book Effect of Mean Stress Intensity on Fatigue Crack Growth in a 5456-H117 Aluminum Alloy written by H. P. Chu and published by . This book was released on 1973 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue crack growth data on a 5456-H117 aluminum alloy was obtained by testing compact tension and contoured double cantilever beam specimens. The effect of tensile mean stress on crack growth rate is found to reach a maximum when stress ratio R> or = 0.25. The crack propagation laws are discussed, and two new equations are developed. It is shown that the new equations can represent the entire range of fatigue crack growth rate, versus applied stress intensity for different R values from threshold behavior to unstable fracture. (Modified author abstract).
Book Synopsis Fatigue Crack Propagation in a 5456-H117 Aluminum Alloy in Air and Sea Water by : H. P. Chu
Download or read book Fatigue Crack Propagation in a 5456-H117 Aluminum Alloy in Air and Sea Water written by H. P. Chu and published by . This book was released on 1973 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue data on a 5456-H117 aluminum alloy have been obtained in air and sea water by fracture mechanics methods. It is found that the presence of sea water increases the crack growth rates and lowers the threshold stress intensity. The data for five stress ratios are correlated with two empirical equations. The effect of sea water on fatigue cracking is also examined by electron fractographs. (Author).
Book Synopsis Effect of Residual Stresses on Fatigue Crack Growth Rates in Weldments of Aluminum Alloy 5456 Plate by : RA. Kelsey
Download or read book Effect of Residual Stresses on Fatigue Crack Growth Rates in Weldments of Aluminum Alloy 5456 Plate written by RA. Kelsey and published by . This book was released on 1982 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rates of fatigue crack propagation were determined for CT specimens taken from the weld metal, heat-affected zone, and base metal of an Alcoa 649A Process 5556 butt weld in a 51-mm (2-in.)-thick 5456-H117 plate. Crack-opening displacement measurements were taken during the fatigue crack propagation tests so that the effects of crack-opening loads and residual stresses could be determined. The use of the concept of Elber's effective stress intensity range, based on the measurements of crack-opening loads, indicates that the crack propagation rates are equivalent in the weld metal, heat-affected zone, and base metal. Furthermore, the effect of stress ratio also can be correlated using the effective stress intensity range concept.
Book Synopsis Fatigue Crack Growth in a 5456-H117 Aluminum Alloy by : H. P. Chu
Download or read book Fatigue Crack Growth in a 5456-H117 Aluminum Alloy written by H. P. Chu and published by . This book was released on 1973 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue crack propagation tests over a range of stress intensity levels have been conducted on a 5456-H117 aluminum alloy with contoured double cantilever beam specimens. It is shown that the crack growth data can be represented by a simple equation which includes a term of threshold stress intensity. The results compare closely with those of a 5456-H321 alloy. (Author).
Book Synopsis Fracture Toughness and Slow - Stable Cracking by : Paul C. Paris
Download or read book Fracture Toughness and Slow - Stable Cracking written by Paul C. Paris and published by ASTM International. This book was released on 1974 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Analysis of the Influence of Mean Stress Intensity and Environment on Fatigue Crack Growth in a New High Strength Aluminum Alloy by : CM. Branco
Download or read book An Analysis of the Influence of Mean Stress Intensity and Environment on Fatigue Crack Growth in a New High Strength Aluminum Alloy written by CM. Branco and published by . This book was released on 1975 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of the mean stress intensity factor Km and the range of the stress intensity ?K on fatigue crack propagation during wholly tensile loading cycles in the aluminum (Al) alloy RR58 in laboratory air and in a 3.5% NaCl solution have been studied using contoured double-cantilever beam specimens. In general the fatigue crack growth rate in NaCl solution was greater than in air under similar conditions except for tests in which high values of the maximum stress intensity factor were used when no significant difference was observed.
Book Synopsis Fatigue Crack Propagation in 2024-T3 and 7075-T6 Aluminum Alloys at High Stresses by : Robert G. Dubensky
Download or read book Fatigue Crack Propagation in 2024-T3 and 7075-T6 Aluminum Alloys at High Stresses written by Robert G. Dubensky and published by . This book was released on 1971 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Crack Growth Measurement and Data Analysis by : S. J. Hudak
Download or read book Fatigue Crack Growth Measurement and Data Analysis written by S. J. Hudak and published by ASTM International. This book was released on 1981 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Stress Ratio on Fatigue Crack Growth and Mode of Fracture in 2024-T4 and 7075-T6 Aluminum Alloys in the Low-cycle Range by : D. Y. Wang
Download or read book Effect of Stress Ratio on Fatigue Crack Growth and Mode of Fracture in 2024-T4 and 7075-T6 Aluminum Alloys in the Low-cycle Range written by D. Y. Wang and published by . This book was released on 1966 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigation was conducted at minimum-to-maximum stress ratios R of -2.5, -2.0, -1.5, -1.0, 0.0 and 0.6. It was observed that the fracture mechanism of low-cycle fatigue involves Stage II fatigue crack growth which is characterized by the development of ductile striations and two essential types of secondary fracture surfaces. It is shown that ductile fatigue crack growth, which involves two types of ductile striations, is governed by the local irreversible plastic deformation at the crack tip in both alloys. The most important mode of secondary crack growth in 2024-T4 aluminum is the brittle fracture or decohension of the constituent particles ahead of the crack tip and the subsequent growth of the interior cracks toward the main crack. The size of the plastic zone at the crack tip appears to determine the degree of influence of this mode of fracture on overall crack growth rate. In 7075-T6, the dominant mode of secondary crack growth is the quasi-cleavage fracture of the matrix. The frequency of occurrence of these two modes of secondary crack growth increases with the stress ratio, i.e., with increasing mean stress. The change in the modes of crack growth as we change from low to high mean stress contributes to the relative differences in fatigue strength of the two materials at various stress ratios.
Book Synopsis The Effect of Water Vapor on Fatigue Crack Growth in 7475-t651 Aluminum Alloy Plate by :
Download or read book The Effect of Water Vapor on Fatigue Crack Growth in 7475-t651 Aluminum Alloy Plate written by and published by . This book was released on 1982 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Fatigue Crack Propagation of Aluminum Alloys at Low Stress Intensity Levels by : J. A. Feeney
Download or read book Environmental Fatigue Crack Propagation of Aluminum Alloys at Low Stress Intensity Levels written by J. A. Feeney and published by . This book was released on 1969 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The environmental fatigue crack propagation in 2024-T3, 7075-T6, and 7178-T6 was studied at low levels of cyclic amplitude of stress intensity, delta K. Both wedge force loading and remote loading techniques were employed to achieve the desired delta K levels, and preliminary experiments were designed to test their compatibility. Testing was carried out in humid air, distilled water, and 3.5% sodium chloride solution, and the observed crack growth rates compared with those in desiccated air. Later studies were also conducted in an inert reference environment with a total water content of less than 2 ppm. When the data are plotted as log delta K versus log d2a/dN, alloy 2024-T3 exhibits a marked slope transition, alloy 7075-T6 a slight slope transition, and alloy 7178-T6 a rectilinear behavior throughout the whole range of delta K studied. The basic shape of these curves is discussed in terms of state-of-stress conditions at the crack tip, frequency effects, environmental effects, strain rate sensitivity, and metallurgical structure. An attempt is also made to correlate the rate of fatigue crack propagation in a particular environment and at a particular delta K level with the fracture topography. (Author).
Book Synopsis Technical Information Indexes by : United States. Naval Air Systems Command
Download or read book Technical Information Indexes written by United States. Naval Air Systems Command and published by . This book was released on 1974 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stress Ratio Effects on Crack Opening Loads and Crack Growth Rates in Aluminum Alloy 2024 by : William T. Riddell
Download or read book Stress Ratio Effects on Crack Opening Loads and Crack Growth Rates in Aluminum Alloy 2024 written by William T. Riddell and published by . This book was released on 1998 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Review of Fatigue Crack Growth in Metallics at Low Stress Intensities by : C. J. Beevers
Download or read book A Review of Fatigue Crack Growth in Metallics at Low Stress Intensities written by C. J. Beevers and published by . This book was released on 1983 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: This review is concerned with the fatigue crack growth response of metallics at low stress intensities. In particular the fatigue threshold e.g. the stress intensity at which cracks can arrest is considered in detail. The fatigue crack growth rates and the fatigue threshold stress intensity delta K/th are considered in relation to the following variables, mean stress, yield stress, test temperature, test frequency, fatigue crack closure, microstructure, environment and crack length. The mechanisms, models and formulations derived to represent fatigue crack growth at low stress intensities and the fatigue threshold are also reviewed. The measurement of fatigue crack growth rates and fatigue thresholds is outlined and the desirability of obtaining delta K/eff data is highlighted. The main characteristics of aluminum alloys, steels and titanium alloys with respect to fatigue crack growth and fatigue thresholds are presented. A conservative view of the fog resistance of metals and alloys is developed which allows the identification of the minimum fatigue threshold and maximum fog rates that can be experienced for a particular set of test conditions. (Author).
Book Synopsis A Model for Joining the Fatigue Crack Initiation and Propagation Analyses by : Wen-Ching Chen
Download or read book A Model for Joining the Fatigue Crack Initiation and Propagation Analyses written by Wen-Ching Chen and published by . This book was released on 1980 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analytical model for nonarbitrarily defining the crack initiation length of a notched member on the basis of the minimum total life estimate is proposed. This model provides an interpretation of fatigue notch size effect and a.
Book Synopsis The effect of thickness of fatigue crack propagation in 7475-T731 aluminum alloy sheet by : Ralph Anthony Daiuto
Download or read book The effect of thickness of fatigue crack propagation in 7475-T731 aluminum alloy sheet written by Ralph Anthony Daiuto and published by . This book was released on 1984 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
