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Author : Jacobus Schijve
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (646 download)
Download or read book Fatigue Crack Growth Predictions for Variable-amplitude and Spectrum Loading written by Jacobus Schijve and published by . This book was released on 1987 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jaap Schijve
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (641 download)
Download or read book Fatigue Crack Growth Predictions for Variable-amplitude and Spectrum Loading written by Jaap Schijve and published by . This book was released on 1987 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (317 download)
Download or read book Prediction of Fatigue-crack Growth Under Variableamplitude and Spectrum Loading Using a Closure Model written by and published by . This book was released on 1981 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : JC. Newman
Publisher :
ISBN 13 :
Total Pages : 23 pages
Book Rating : 4.:/5 (125 download)
Download or read book Prediction of Fatigue Crack Growth Under Variable-Amplitude and Spectrum Loading Using a Closure Model written by JC. Newman and published by . This book was released on 1982 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present paper is concerned with the application of an analytical crack-closure model in the study of crack growth under various load histories. The model was based on a concept like the Dugdale model, but modified to leave plastically deformed material in the wake of the advancing crack tip.
Author : EP. Phillips
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (125 download)
Download or read book Prediction of Crack Growth Under Variable-Amplitude and Spectrum Loading in a Titanium Alloy written by EP. Phillips and published by . This book was released on 2004 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present paper is concerned with the application of a plasticity-induced crack-closure model, FASTRAN, to predict fatigue-crack growth under various load histories in a thin-sheet Ti-62222 STA titanium alloy. This alloy was a leading candidate for a metallic High-Speed-Civil-Transport (HSCT) aircraft in the United States. The crack-growth model was based on the Dugdale strip-yield model but modified to leave plastically deformed material in the wake of the advancing crack. The model includes the influence of "constraint" on the development of plasticity and closure during constant- and variable-amplitude load histories. The model was used to correlate crack-growth-rate data under constant-amplitude loading over a wide range in crack-growth rates and stress ratios at two service temperatures (room temperature and 175°C). Tests on repeated spike overloads were used to help establish the constraint variations in the model. The model was then used to predict crack growth under two simulated aircraft spectrum load histories at the two temperatures. The spectra were a commercial HSCT wing spectrum and the Mini-TWIST (transport wing spectrum). This paper will demonstrate how constraint plays a leading role in the retardation and acceleration effects that occur under variable- amplitude and spectrum loading. The model was able to calculate the effects of repeated spike overloads on crack growth at the two temperatures, generally within about ± 30 %. Also, the predicted crack-growth behavior under the HSCT spectrum agreed well with test data (within 30 %). However, the model under-predicted the fatigue-crack-growth behavior under the Mini-TWIST spectrum by about a factor-of-two. Some of the differences may be due to fretting-product-debris-induced closure or three-dimensional effects, such as free-surface closure, not included in the model. Further study is needed on life predictions under the Mini-TWIST flight spectrum.
Author : D. F. Bryan
Publisher : ASTM International
ISBN 13 :
Total Pages : 246 pages
Book Rating : 4./5 ( download)
Download or read book Effect of Load Spectrum Variables on Fatigue Crack Initiation and Propagation written by D. F. Bryan and published by ASTM International. This book was released on 1980 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. B. Chang
Publisher : ASTM International
ISBN 13 : 9780803107151
Total Pages : 150 pages
Book Rating : 4.1/5 (71 download)
Download or read book Methods and Models for Predicting Fatigue Crack Growth Under Random Loading written by J. B. Chang and published by ASTM International. This book was released on 1981 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter C. McKeighan
Publisher : ASTM International
ISBN 13 : 0803134797
Total Pages : 588 pages
Book Rating : 4.8/5 (31 download)
Download or read book Fatigue Testing and Analysis Under Variable Amplitude Loading Conditions written by Peter C. McKeighan and published by ASTM International. This book was released on 2005 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. Schijve
Publisher : Springer Science & Business Media
ISBN 13 : 1402068085
Total Pages : 627 pages
Book Rating : 4.4/5 (2 download)
Download or read book Fatigue of Structures and Materials written by J. Schijve and published by Springer Science & Business Media. This book was released on 2008-12-16 with total page 627 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue of structures and materials covers a wide scope of different topics. The purpose of the present book is to explain these topics, to indicate how they can be analyzed, and how this can contribute to the designing of fatigue resistant structures and to prevent structural fatigue problems in service. Chapter 1 gives a general survey of the topic with brief comments on the signi?cance of the aspects involved. This serves as a kind of a program for the following chapters. The central issues in this book are predictions of fatigue properties and designing against fatigue. These objectives cannot be realized without a physical and mechanical understanding of all relevant conditions. In Chapter 2 the book starts with basic concepts of what happens in the material of a structure under cyclic loads. It illustrates the large number of variables which can affect fatigue properties and it provides the essential background knowledge for subsequent chapters. Different subjects are presented in the following main parts: • Basic chapters on fatigue properties and predictions (Chapters 2–8) • Load spectra and fatigue under variable-amplitude loading (Chapters 9–11) • Fatigue tests and scatter (Chapters 12 and 13) • Special fatigue conditions (Chapters 14–17) • Fatigue of joints and structures (Chapters 18–20) • Fiber-metal laminates (Chapter 21) Each chapter presents a discussion of a speci?c subject.
Author : J. Petit
Publisher : Springer
ISBN 13 :
Total Pages : 422 pages
Book Rating : 4.F/5 ( download)
Download or read book Fatigue Crack Growth Under Variable Amplitude Loading written by J. Petit and published by Springer. This book was released on 1988-12-31 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
ISBN 13 : 9781723726118
Total Pages : 28 pages
Book Rating : 4.7/5 (261 download)
Download or read book Fatigue Analyses Under Constant- And Variable-Amplitude Loading Using Small-Crack Theory written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-15 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies on the growth of small cracks have led to the observation that fatigue life of many engineering materials is primarily "crack growth" from micro-structural features, such as inclusion particles, voids, slip-bands or from manufacturing defects. This paper reviews the capabilities of a plasticity-induced crack-closure model to predict fatigue lives of metallic materials using "small-crack theory" under various loading conditions. Constraint factors, to account for three-dimensional effects, were selected to correlate large-crack growth rate data as a function of the effective stress-intensity factor range (delta-Keff) under constant-amplitude loading. Modifications to the delta-Keff-rate relations in the near-threshold regime were needed to fit measured small-crack growth rate behavior. The model was then used to calculate small-and large-crack growth rates, and to predict total fatigue lives, for notched and un-notched specimens under constant-amplitude and spectrum loading. Fatigue lives were predicted using crack-growth relations and micro-structural features like those that initiated cracks in the fatigue specimens for most of the materials analyzed. Results from the tests and analyses agreed well.Newman, J. C., Jr. and Phillips, E. P. and Everett, R. A., Jr.Langley Research CenterCRACK PROPAGATION; FATIGUE LIFE; MICROCRACKS; STRESS INTENSITY FACTORS; DYNAMIC LOADS; FRACTURE MECHANICS; VARIABLE AMPLITUDE LOADING; MICROSTRUCTURE; VOIDS; EDGE DISLOCATIONS; DEFECTS; NOTCHES; CRACK CLOSURE; PLASTIC PROPERTIES
Author : J. C. Newman (Jr)
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (317 download)
Download or read book Fatigue Life and Crack Growth Prediction Methodology written by J. C. Newman (Jr) and published by . This book was released on 1993 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ichsan S. Putra
Publisher :
ISBN 13 :
Total Pages : 236 pages
Book Rating : 4.:/5 (257 download)
Download or read book Fatigue Crack Growth Predictions of Surface Cracks Under Constant-amplitude and Variable-amplitude Loading written by Ichsan S. Putra and published by . This book was released on 1994 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (933 download)
Download or read book Fatigue Crack Growth Prediction Methods for Variable Amplitude Loading written by and published by . This book was released on 1988 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Considerable data on fatigue properties of materials under constant amplitude loading is available in the literature under the forms representative of the different aspects of the fatigue phenomenon. To employ these data, the design engineer must adapt it to the particular service conditions that he is concerned with. The stress vs. life or S-N curve is largely related to the fatigue initiation behaviour of materials and defines the endurance limit which is used for design. The strain-life curve is of more recent origin and relates the elastic and plastic strain amplitudes to the initiation life. Fatigue propagation data are presented on a crack growth rate vs. stress intensity factor range diagram.
Author : R. P. Wei
Publisher :
ISBN 13 :
Total Pages : 25 pages
Book Rating : 4.:/5 (227 download)
Download or read book Load and Environment Interactions in Fatigue Crack Growth Under Spectrum Loading written by R. P. Wei and published by . This book was released on 1978 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of delay (or, retardation in the rate of fatigue crack growth) produced by load interactions in variable-amplitude loading on the accurate prediction of fatigue lives of aircraft and other engineering structures has been recognized for some time and has begun to receive greater attention in recent years. Recent investigations showed that the effects of delay can be quite large, and that these effects need to be taken into account in developing improved fatigue analysis procedures for aircraft and other engineering structures. A number of models (based on the concepts of crack closure, residual stress intensity factor, etc.) have been proposed to account for the effects of delay. These models, while successfully predicting trends in the rate of fatigue crack growth for randomized load spectra, appear to break down for ordered spectra. Several basic problems contributed to the lack of complete success, and needs to be resolved in the development of improved models for predicting load interaction effects (chiefly delay) on fatigue crack growth.
Author : François G. Hamel
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.:/5 (354 download)
Download or read book Fatigue Crack Growth Prediction Methods for Variable Amplitude Loading written by François G. Hamel and published by . This book was released on 1983 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ralph Ivan Stephens
Publisher : ASTM International
ISBN 13 :
Total Pages : 345 pages
Book Rating : 4./5 ( download)
Download or read book Fatigue Crack Growth Under Spectrum Loads written by Ralph Ivan Stephens and published by ASTM International. This book was released on 1976 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt:
