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Fatigue Crack Growth Behavior Of Railroad Tank Car Steel Tc 128b Subjected To Various Environments Volume Ii Appendices
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Book Synopsis Fatigue Crack Growth Behavior of Railroad Tank Car Steel Tc-128b Subjected to Various Environments Volume II, Appendices by : U.s. Department of Transportation
Download or read book Fatigue Crack Growth Behavior of Railroad Tank Car Steel Tc-128b Subjected to Various Environments Volume II, Appendices written by U.s. Department of Transportation and published by CreateSpace. This book was released on 2013-12 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is Volume II-Appendices of Fatigue Crack Growth Behavior of Railroad Tank Car Steel TC-128B Subjected to Various Environments. This document contains miscellaneous supporting documentation, fatigue crack growth laboratory data, and analyses.
Book Synopsis Fatigue Crack Growth Behavior of Railroad Tank Car Steel Tc-128b Subjected to Various Environments by : U.S.Departmentoftransportation
Download or read book Fatigue Crack Growth Behavior of Railroad Tank Car Steel Tc-128b Subjected to Various Environments written by U.S.Departmentoftransportation and published by CreateSpace. This book was released on 2013-12 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of an effort to apply damage tolerance concepts to railroad tank cars, the fatigue crack growth (FCG) behavior of two lots of TC-128B steel was investigated. In addition to the material lot difference, variables assessed include: load ratio, orientation, environment, and crack growth test technique. The two material lots yielded essentially identical FCG properties for low and high stress ratios. The influence of stress ratio was slight, except in the near-threshold regime.
Book Synopsis Fatigue Crack Growth Behavior of Railroad Tank Car Steel TC-128B Sujected to Various Environments by : Peter C. McKeighan
Download or read book Fatigue Crack Growth Behavior of Railroad Tank Car Steel TC-128B Sujected to Various Environments written by Peter C. McKeighan and published by . This book was released on 2006 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue crack growth behavior of railroad tank car steel TC-128B subjected to various environments by : Peter C. McKeighan
Download or read book Fatigue crack growth behavior of railroad tank car steel TC-128B subjected to various environments written by Peter C. McKeighan and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Crack Growth Behavior of Railroad Tank Car Steel TC-128B Sujected to Various Environments by : Peter C. McKeighan
Download or read book Fatigue Crack Growth Behavior of Railroad Tank Car Steel TC-128B Sujected to Various Environments written by Peter C. McKeighan and published by . This book was released on 2006 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Variable Amplitude Fatigue Crack Growth Characteristics of Railroad Tank Car Steel by : U.s. Department of Transportation
Download or read book Variable Amplitude Fatigue Crack Growth Characteristics of Railroad Tank Car Steel written by U.s. Department of Transportation and published by CreateSpace. This book was released on 2013-12 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The load history that railroad tank cars experience has a significant variable amplitude characteristic. Although previous efforts have been directed toward understanding baseline fatigue crack growth behavior of TC-128B steel as a function of material lot, orientation, and environment, little is known regarding how load interaction impacts crack growth behavior in a typical tank car steel. Load interaction occurs when the variable amplitude character of the loading results in crack growth that differs as a function of load history effects in the wake of the crack. The focus of this testing effort was to determine empirically how TC- 128B behaves under these types of simplified loading conditions. The data provided in this report links the constant amplitudeloading regime to the more complex variable amplitude-loading regime that tank cars experience during in-service use. The data can also be used as modeling guidelines to better understand the role of variable amplitude loading on TC-128B.
Book Synopsis Variable Amplitude Fatigue Crack Growth Characteristics of Railroad Tank Car Steel by : James H. Feiger
Download or read book Variable Amplitude Fatigue Crack Growth Characteristics of Railroad Tank Car Steel written by James H. Feiger and published by . This book was released on 2006 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iron & Steelmaker written by and published by . This book was released on 2002 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Use of Numerical Models to Design Fatigue Crack Growth Tests for a Railroad Tank'Car Spectrum by : WT. Riddell
Download or read book On the Use of Numerical Models to Design Fatigue Crack Growth Tests for a Railroad Tank'Car Spectrum written by WT. Riddell and published by . This book was released on 2002 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The railroad tank car industry is moving toward damage-tolerance-based inspection intervals to maintain the safe and efficient transport of hazardous materials by rail. One aspect of this effort is predicting fatigue crack growth rates that result from railroad tank car service conditions. A fracture mechanics parameter, H, is proposed to relate the crack-tip driving force under a railroad tank car spectrum to the resulting crack growth rates. This approach will allow the direct application of fatigue crack growth rate data resulting from laboratory tests to models for crack growth under railroad service conditions. However, for this approach to be successful, it is essential that similitude between lab tests and the structural application is maintained, so that fatigue crack growth rates are predicted correctly. Two crack-closure-based models are used to predict the effects of various laboratory test design parameters on fatigue crack growth rates for the loaded vertical coupler force (LVCF) spectrum, which describes the vertical coupler forces for a loaded railroad tank car. Random ordered load blocks are predicted to result in growth rates approximately twice as great as those resulting from either low-high or high-low ordered blocks. Truncating even the smallest amplitudes from the spectrum was predicted to affect crack growth rates. The most significant effect predicted was that of the far-field stress level. Although changes in stress level are predicted to have only a minor affect (approximately 20%) on constant-amplitude fatigue crack growth rates, corresponding changes in stress level are predicted to affect variable-amplitude fatigue crack growth rates by up to a factor of six. These results suggest that tests designed to determine fatigue crack growth rates for the LVCF spectrum must be considered carefully, and that crack closure based models for fatigue crack growth are a valuable tool for designing such tests.
Book Synopsis Fatigue Crack Growth and Fracture Behavior of Bainitic Rail Steels, Final Report by : Heshmat A. Aglan
Download or read book Fatigue Crack Growth and Fracture Behavior of Bainitic Rail Steels, Final Report written by Heshmat A. Aglan and published by . This book was released on 2011 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Crack Growth of A508 Steel in High-temperature, Pressurized Reactor Grade Water by : W. H. Cullen
Download or read book Fatigue Crack Growth of A508 Steel in High-temperature, Pressurized Reactor Grade Water written by W. H. Cullen and published by . This book was released on 1979 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Review of Fatigue Crack Growth of Pressure Vessel and Piping Steels in High-temperature, Pressurized Reactor-grade Water by : W. H. Cullen
Download or read book A Review of Fatigue Crack Growth of Pressure Vessel and Piping Steels in High-temperature, Pressurized Reactor-grade Water written by W. H. Cullen and published by . This book was released on 1980 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue crack growth data sets, for pressure vessel and piping steels, in reactor-grade water environment have appeared in various reports and publications since about 1972. All of the results which have been published from 1972 through 1979 have been plotted and are presented in this report. Beginning with a discussion of the need for these data, and an explanation of the laboratory facilities which are required for this research, this report goes on to describe the overall trends which have evolved through consideration of the data sets and the conditions under which they were generated. A model for hydrogen assisted fatigue crack growth is described and applied to the pressurized water reactor type of environment. A complete listing of references is included in the report. (Author).
Book Synopsis A Methodology for Assessing Fatigue Crack Growth Reliability of Railroad Tank Cars by : W. Zhao
Download or read book A Methodology for Assessing Fatigue Crack Growth Reliability of Railroad Tank Cars written by W. Zhao and published by . This book was released on 2004 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A methodology for assessing structural reliability of railroad tank cars undergoing fatigue crack growth is being developed. A three-degree-of freedom (3-dof) surface crack is employed to account for an asymmetric stress field existing at a fatigue critical location in tank car structures. A fatigue life prediction program using the Walker equation to account for stress ratio effects is developed for the 3-dof surface crack model. A component reliability problem is formulated as a limit state function and solved using a first-order reliability method along with importance sampling method within the commercial reliability software, STRUREL. The methodology is demonstrated using illustrative railroad tank car examples. The results show that: (a) failure probability, Pf, increases as tank car mileage increases; (b) welding residual stresses in the tank structure can significantly increase Pf ; (c) uncertainty in the stress amplitude also has a significant effect on Pf; and (d) the correlation between initial crack depth and initial crack aspect ratio is an important parameter.
Book Synopsis Fatigue Crack Growth Behavior of Four High Strength Steels in Two Humid Environments by : C. E. Neu
Download or read book Fatigue Crack Growth Behavior of Four High Strength Steels in Two Humid Environments written by C. E. Neu and published by . This book was released on 1971 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue crack growth rates (da/dN) as a function of applied stress intensity amplitude (delta K) were determined for four high strength steels (HP 9-4-.45, 18% Ni marage 250, D6Ac, AISI 4340) in air at 10 percent and at 80 percent relative humidities (R.H.). All four steels demonstrated sensitivity to high humidity with crack growth rates in 80 percent R.H. air being one and one-half to two times as high as in 10 percent R.H. air. Overall crack growth rates of three steels, HP 9-4-.45, 18% Ni marage 250, and D6Ac, were similar, while rates for AISI 4340 were uniformly higher than those of the other three steels. (Author).
Book Synopsis Fatigue Crack Growth Behavior of a High-Strength Steel by : Maurice F. Amateau
Download or read book Fatigue Crack Growth Behavior of a High-Strength Steel written by Maurice F. Amateau and published by . This book was released on 1971 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue crack growth behavior of high-strength Ladish D6AC steel was examined under various conditions of frequency, environment, temperature, stress ratio, and stress intensity history. Materials with fracture toughness ranging from 50 to 100 ksi/sq. in., but with the same yield strength of 220 ksi, were examined. Variations in fracture thoughness do not have a strong effect on crack growth rate at stress intensity levels within the log-linear portion of the crack growth curves. Different environments, such as dry air, laboratory air, and distilled water, were found to produce different fatigue crack growth behavior at 1 Hz but not at 10 Hz loading frequency. The lowest crack growth rate occurred in dry air, while the aggressive environment of distilled water affected the crack growth rate more severly at lower stress intensity levels. The effects of temperature over the range from -40 to 175F are a uniform shift of the growth curve to low crack growth rates and a lowering of the stress intensity level for the onset of rapid fatigue crack propagation. Suppression of crack growth rate following high prior stress cycles is the most significant effect of stress history. This effect cannot be explained in terms of the relative plastic zone sizes alone. (Author).
Book Synopsis Fatigue Crack Initiation and Propagation in Steels Exposed to Inert and Corrosive Environments by : Kourosh Youssefi
Download or read book Fatigue Crack Initiation and Propagation in Steels Exposed to Inert and Corrosive Environments written by Kourosh Youssefi and published by . This book was released on 1978 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Crack Growth and Life Predictions in Man-Ten Steel Subjected to Single and Intermittent Tensile Overloads by : GO. Njus
Download or read book Fatigue Crack Growth and Life Predictions in Man-Ten Steel Subjected to Single and Intermittent Tensile Overloads written by GO. Njus and published by . This book was released on 1977 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue crack growth behavior was investigated in Man-Ten steel under conditions of constant load amplitude, single tensile overloads followed by constant load amplitude and intermittent single tensile overloads. Constant-amplitude ratios, Rl = Plmin / Plmax, were + 1/2, 0, -1/2, -1 and -2. The single overload test program excluded Rl = +1/2, and the intermittent overload program was for Rl = 0 only. A new simplified mathematical model was introduced which assumes that fatigue crack growth retardation is primarily a function of the overload ratio and the load ratio. The model predicted intermittent tensile overload life within 57 to 112 percent of the experimental life. The average prediction was 77 percent of experimental life. For Man-Ten steel, constant-amplitude crack growth rate versus positive ?? fell within a reasonable scatter band for Rl = 1/2 to -1. However, substantial decrease in life occurred with Rl = -2. Negative values of Rl following a single tensile overload substantially reduced retardation life. Thus compressive stress, either large or small, cannot be neglected in spectrum loading fatigue crack growth life predictions.
