Download or read book Influence of Seawater and Residual Stress Fields on the Fatigue Crack Growth Rate C Mn Steel Welded Joints written by Leonardo Bertini and published by . This book was released on 1990 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Seawater and Residual Stresses on Fatigue Crack Growth in C Mn Steel Weld Joints written by Leonardo Bertini and published by . This book was released on 1991 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis and Design of Marine Structures V written by C. Guedes Soares and published by CRC Press. This book was released on 2015-03-11 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analysis and Design of Marine Structures V contains the papers presented at MARSTRUCT 2015, the 5th International Conference on Marine Structures (Southampton, UK, 25-27 March 2015). The MARSTRUCT series of conferences started in Glasgow, UK in 2007, the second event of the series took place in Lisbon, Portugal (2009), while the third was in Hambur
Download or read book Metals Abstracts written by and published by . This book was released on 1992 with total page 1796 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Residual Stresses on Fatigue Crack Growth in Steel Weldments Under Constant and Variable Amplitude Loads written by G. Glinka and published by . This book was released on 1979 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research deals with the effect of welding residual stresses on fatigue crack growth in medium strength low alloy steel weldments. Three kinds of flat specimens have been used--unwelded specimens, specimens with butt perpendicular welds, and specimens with butt longitudinal welds. Residual stress distributions were others in both kinds of welded specimens. All specimens were tested under constant and variable amplitude load with stress ratios R > 0. Forman's equation and Wheeler's model of crack retardation were used for theoretical analysis of fatigue crack growth under constant and variable amplitude load, respectively. The theoretical results were more realistic when effective stress ratio Reff and effective stress intensity range ?Keff, which compensated for residual stresses, were used. It was found that the tensile residual stresses increased the fatigue crack growth rate and compressive stresses reduced it. The lower the applied load, the higher the residual stress effect. This paper presents both experimental results and an analytical method of fatigue crack growth prediction in steel weldments on the basis of results obtained from parent material properties.
Download or read book Corrosion fatigue Crack Growth Rate in a C Mn Steel and in ITS Welded Joints in Seawater written by Leonardo Bertini and published by . This book was released on 1990 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of residual stresses on the fatigue crack propagation in welded joints written by Nenad Gubeljak and published by . This book was released on 2005 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of residual stress on the fatigue crack growth was investigated for cyclic tension. Three-point bend specimens were used with through thickness notches at the center line of the welded joint. The experiments were performed for different load amplitudes and load ratios under conditions of small-scale yielding. The influence of the residual stresses on fatigue crack growth was estimated by experimentally observed fatigue crack growth rate and measurement of residual stresses at the surface of specimen. This paper describes an approach taken in two models to estimate the residual stress effect on fatigue crack propagation and to predict remaining service life of a welded structure.
Download or read book Computers and Experiments in Stress Analysis written by Giovanni M. Carlomagno and published by . This book was released on 1989 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last decade, ontologies have received much attention within computer science and related disciplines, most often as the semantic web. Ontology Learning and Population from Text: Algorithms, Evaluation and Applications discusses ontologies for the semantic web, as well as knowledge management, information retrieval, text clustering and classification, as well as natural language processing. Ontology Learning and Population from Text: Algorithms, Evaluation and Applications is structured for research scientists and practitioners in industry. This book is also suitable for graduate-level students in computer science.
Download or read book Effects of Welding Residual Stress and Corrosion Products on Corrosion Fatigue Crack Propagation Rate in Welded Components in Natural Seawater written by R Murakami and published by . This book was released on 1989 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Petroleum Abstracts written by and published by . This book was released on 1988 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Salt Water on Fatigue Crack Growth in High Strength Structural Steels written by TW. Crooker and published by . This book was released on 1970 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue-crack growth is a potential failure mechanism that can be strongly influenced by a salt-water environment. This paper discusses fatigue-crack-propagation studies performed on three high-strength structural steels: 9Ni-4Co-0.25C, 12Ni 180-grade maraging, and 18Ni 200-grade maraging. Each steel underwent a program of fatigue cycling in two environments, a "dry" environment consisting of ambient room air and a "wet" environment consisting of 3.5 percent NaCl salt water. Relationships for fatigue-crack-growth rates as a function of the fracture mechanics stress-intensity factor (K) were obtained experimentally for each steel in both environments. The engineering significance of these relationships is presented in terms of stress levels and flaw sizes relevant to the steels under investigation. The results of this work indicate that, in an air environment, the fatigue-crack-growth rate correlates with the stress-intensity-factor range according to the power-law relationship, da/dN = C (?K)m. Fatigue-crack growth in each of the steels was accelerated by the salt-water environment. However, the environmental response varied significantly, depending upon the material and the ?K level. The lower-toughness steel was less affected by environment, and environmental effects in all the steels diminished with increasing ?K levels. No correlation was observed between fatigue-crack-growth behavior in the salt-water environment and the stress-corrosion-cracking parameter (K Iscc) obtained on the same materials.
Download or read book Fatigue Crack Growth in A36 A283 Plate in Air and Sea Water Environments written by F. R. Stonesifer and published by . This book was released on 1981 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensive use of A36 type steels in wave-excited marine structures raises the question of its resistance to fatigue crack propagation in the sea water environment. Above its ductile-brittle transition temperature, static fracture of such a low strength steel usually entails extensive plastic deformation. However with cyclic loading, fatigue cracks can grow with little plastic flow, at crack loading levels well below that required for fracture instability. The hazard entailed has the positive benefit of allowing linear elastic fracture mechanics to be utilized in applying test data to problems of structural life prediction. To this end, this paper report crack growth data on A36 plate at laboratory temperature in air and in synthetic sea water. Two extremes of mean stress or stress ratio R=0 and 0.8 typify the ordinary condition as well as growth in the residual stress field of a constrained weld. Varied cyclic frequencies as low as 0.1 Hz reach as low the natural sway frequencies of very large structures at sea. The new data is compared with literature data from other structural steels using fitting parameters of the NRL tensile ligament instability model for crack propagation. Results indicate that no relief from corrosion fatigue effects is derived from the relatively low yield strength level of this steel. (Author).
Download or read book Stress Intensity Factor Analysis and Fatigue Behavior of a Crack in the Residual Stress Field of Welding written by Hiroyuki Terada and published by . This book was released on 2007 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper deals with the behavior of a crack in the residual stress field induced by butt weld in a wide plate. It is known that the distribution pattern of residual stress is similar regardless of welding process, though the size and the magnitude of the residual stress depend largely on the welding process. Stress intensity factor and stress redistribution induced by the crack extension were calculated for a crack with arbitrary length and location. The stress redistributions caused by crack extension obtained by the present analysis showed good agreement with the experimental data. Fatigue crack propagation behavior in the residual stress field reported by Glinka was also examined from the ?K point of view. In this paper, the effect of residual stress on the fatigue crack propagation rate is considered to be the effect of varying mean stress. The concept of ?Keff, where the effect of residual stress is accounted as the correction factor by the way of simple superposition, is shown to predict the crack growth rate with sufficient accuracy.
Download or read book A Quantitative Assessment of the Residual Stress Effects on Fatigue Crack Propagation in Structural Steel Weldments in Air Seawater written by Leonardo Bertini and published by . This book was released on 1989 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Residual Stress Fields at Notches written by R. Cook and published by . This book was released on 1985 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue Crack Growth in Welded Joints in Sea Water written by Stephan Blair Lambert and published by . This book was released on 1988 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Review of Fatigue Crack Growth Rates in Air and Seawater written by R. N. King and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
