Download or read book Temperature Effects on Dynamic Fracture of Pipeline Steel written by Sourayon Chanda and published by . This book was released on 2015 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effective layout of pipelines for mass transportation of oil/gas is a major area of research in the present world. Due to fracture of pipelines, long-lasting and catastrophic hazards may be initiated. Hence, study of dynamic fracture of pipeline steel (PS) is a major research topic in pipeline industry. In many colder parts of the world, like northern Canada, the temperature varies from about -50°C in winter to +35°C in summer. Hence a thorough knowledge of the temperature dependent performance of PS is crucial for efficient design of pipelines. The present thesis aims to address this issue by studying the effects of temperature variation on dynamic fracture characteristics of PS. The present work aims to develop a temperature dependent cohesive zone model (CZM)-based finite element (FE) analysis to simulate drop weight tear test (DWTT). The primary work of this project is to identify the key CZM parameters that are affected by temperature variations and co-relate these parameters with known mechanical properties of PS. Based on these correlations, a temperature dependent cohesive zone model has been presented. To achieve this goal, the true stress strain behavior of pipeline steel have been represented by a modified form of Johnson & Cook model and a non-linear temperature dependency of fracture toughness for PS has been employed. The FE modeling of the CZM has been done using Abaqus/CAE 6.13. The model has been validated by comparing with the load-displacement curves from actual DWTT. The FE simulations of DWTT enable us to study the dynamic fracture behavior of PS at different temperatures. In this analysis, the time history of crack propagation for six different temperatures has been plotted. The obtained relationships show a region of steady-state crack growth during which toughness parameters like crack tip opening angle (CTOA) and crack tip opening displacement (CTOD) remain almost constant. This observation corresponds to experimental findings in this area. Further, the steady state energy from load-displacement curve seems to decrease steeply with decrease in temperature. The steady state toughness parameters like CTOA and CTOD have been obtained for each simulation. These toughness parameters were found to exhibit an increase with increase in temperature which can be formulated using an exponential relation. These results are consistent with temperature variation of experimentally determined CTOD values for steel reported in the literature. In short, the present thesis reports a simple but holistic approach to analyze the fracture behavior of PS at varying temperature using a temperature dependent CZM-based FE model.
Download or read book A Comparative Study of the Effect of Low Temperature on the Fracture Toughness and Cyclic Properties of Two Candidate High Strength Low Alloy Steels for Arctic Pipeline Applications written by MR. Krishnadev and published by . This book was released on 1981 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of the need for a better understanding of the effect of Arctic low temperature environments on the mechanical behavior of high-strength low-alloy (HSLA) steels, a comparative study has been undertaken to evaluate the effect of low temperature on the mechanical properties of two candidate steels, columbium-molybdenum "acicular ferrite" HSLA steel and high-columbium HSLA steel. The paper presents the data relating to the effect of low temperature on the mechanical properties, namely, dynamic fracture toughness KId properties, through instrumented impact testing of precracked Charpy V-notch samples and cyclic properties of the two steels. It also discusses the results in terms of their significance to material specification, selection, and performance criteria for safe and economical transportation of petroleum resources from the Canadian Arctic.
Download or read book Effect of Temperature on the Dynamic Fracture and Shock Performance of Graded Materials written by Sachin Gupta and published by . This book was released on 2011 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanics and Mechanisms of Fracture written by Alan F. Liu and published by ASM International. This book was released on 2005-01-01 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elevated Temperature Effects on Fatigue and Fracture written by Robert S. Piascik and published by ASTM International. This book was released on 1997 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fracture at High Temperatures written by Hermann Riedel and published by Springer. This book was released on 2014-01-13 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of an international conference on Dynamic Crack Propagation written by George C. Sih and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 707 pages. Available in PDF, EPUB and Kindle. Book excerpt: The planning meeting for a conference on Dynamic Crack Propagation was held at M.LT. in February 1971 and attended by research workers from several industrial, governmental and academic organizations. It was felt that a more specialized meeting would provide a better opportunity for both U.S. and foreign researchers to exchange their ideas and views on dynamic fracture, a subject which is seldom emphasized in national or international fracture conferences. Dynamic crack propagation has been a concern to specialists in many fields: continuum mechanics, metallurgy, geology, polymer chemistry, orthopedics, applied mathematics, as well as structural design and testing. It impinges on a wide variety of problems such as rock breaking and earthquakes, pressure vessels and line pipes, comminution and the per formance of armament and ordnance, etc. Advances have been numerous, covering theories and experiments from both the microscopic and macro scopic points of view. Hence, the need for comparing the theoretical and experimental results and bridging the gaps between the atomistic and continuum approaches must be constantly emphasized. It also appeared that the overall problem of dynamic fracture could benefit from a con solidation of crack models proposed for the various types of materials: metals, ceramics, composites, rocks, glasses, polymers and biomaterials.
Download or read book Fracture and Fatigue Control in Structures written by Stanley Theodore Rolfe and published by ASTM International. This book was released on 1977 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emphasizes applications of fracture mechanics to prevent fracture and fatigue failures in structures, rather than the theoretical aspects of fracture mechanics. The concepts of driving force and resistance force are used to differentiate between the mathematical side and the materials side. Case studies of actual failures are new to the third edition. Annotation copyrighted by Book News, Inc., Portland, OR
Download or read book Dynamic Fracture Behavior of High Strength Pipeline Steel written by Sarath Chandran and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Loading Rate and Temperature on the Fracture Toughness of High Strength Steels written by David P. Kendall and published by . This book was released on 1970 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of loading rates, ranging from 10 to 100,000 ksi square root of (in/sec), and temperatures, ranging from room temperature to -100F, on the plane strain fracture toughness of several high strength alloy steels has been determined. Materials investigated are a commercial 4340 steel, a modified 4330 steel from a gun tube forging having three different heat treatments and two different heats of 250 grade maraging steel. Test specimens utilized are essentially ASTM 'compact tension' type specimens of one inch thickness. Tests were conducted on an open loop, hydraulic, high loading rate tensile testing machine. Results are presented in the form of graphs of fracture toughness versus temperature for the maximum and minimum loading rates ('dynamic' and 'static'). Fracture toughness versus loading rate at -60F and yield strength versus elastic strain rate at room temperature, -60F and -100F for one heat of maraging steel are also reported. (Author).
Download or read book Effect of Austempering Variables on the Quasi Static and Dynamic Fracture Toughness of Austempered Ductile Iron written by MN. Srinivasan and published by . This book was released on 1999 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Statistical design of experiments was employed to study the effect of austenitizing temperature, austempering temperature, and austempering time on the quasi-static and dynamic fracture toughness of austempered ductile iron of a standard composition. Regression equations were developed to determine the relative significance of the variables in affecting the quasi-static and dynamic fracture toughness of the austempered iron studied.
Download or read book Structural Integrity Assessment written by Jian Ming Gong and published by Trans Tech Publications Ltd. This book was released on 2019-03-15 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edition is published by results of the 2018 International Symposium on Structural Integrity (ISSI2018, Nov. 2-5, 2018, Nanjing, China). The articles cover a variety of topics associated with research in the area of the structural integrity assessment and ensuring, while the fracture mechanics, damage mechanisms and structural strength aspects of engineering materials have been closely focused on. The publication of the proceedings aims to present the current solutions in the field of structural integrity research of materials, components and structures.
Download or read book Fracture Toughness Testing and Its Applications written by ASTM Committee E-24 Staff and published by ASTM International. This book was released on 1981-10 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Dynamic Strain Aging on Fracture Resistance of Carbon Steels Operating at Light Water Reactor Temperatures written by MP. Landow and published by . This book was released on 1990 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper reviews the phenomenon of dynamic strain aging in carbon steels and considers its effects on the fracture behavior of carbon-steel pipes and pressure vessels in lightwater reactors operating at elevated temperatures near 290°C (550°F).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1987 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Temperature Dependence of the Dynamic Fracture Toughness Ofthealloy Incoloy 800 After Cold Work written by K. Krompholz and published by . This book was released on 1991 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fracture Mechanics Fourteenth Symposium STP 791 written by Lewis and published by ASTM International. This book was released on 1983-08 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:
