Download or read book High Strain Rate induced Failure in Steels at High Shear Strains written by and published by . This book was released on 1908 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials deformed at high strain rates exhibit sometimes the behaviour that is very different from that at static or quasi-static loading. Material and physical properties that are of no concern in low strain rates become crucial in the material response at high strain rates. Material properties such as thermal diffusivity and thermal softening have to be considered in order to understand the mechanism of deformation at high strain rates. The most important aspect of high strain rate deformation is the occurrence of local thermal and mechanical instability that leads to failure of the material, usually characterised by the occurrence of adiabatic shear bands (ASB). In this study, AISI 4140 steel was tested using a torsional split Hopkinson bar at three different strain rates and the impact of strain rate on the material behaviour was examined. The influence of material hardness on failure mechanisms was also investigated by producing different tempers of 4140 steel with distinct microstructures and different hardness. The fracture surface of specimens was examined under the scanning electron microscope (SEM). (Abstract shortened by UMI.).
Download or read book High Strain Rate Induced Failure in Steels at High Shear Strains written by Nebojša Panić and published by . This book was released on 1999 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Behavior of Materials written by Marc A. Meyers and published by John Wiley & Sons. This book was released on 1994-10-28 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt: Addresses fundamentals and advanced topics relevant to the behavior of materials under in-service conditions such as impact, shock, stress and high-strain rate deformations. Deals extensively with materials from a microstructure perspective which is the future direction of research today.
Download or read book Hydrogen induced Delayed Brittle Failures of High strength Steels written by A. R. Elsea and published by . This book was released on 1964 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanical Twinning of Crystals written by M. V. Klassen-Neklyudova and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph is not confined to mechanical twinning in the narrow sense (lattice reorientation in re sponse to mechanical stress); it deals also with many effects related to mechanical twinning. such as formation of reoriented regions in response to high temperatures (martensite transformations. recrystallization twins). elec tric fields (ferroelectric domains). and magnetiC fields (magnetic domains). Mechanical reorientation is discussed for classical twinning and also for an inhomogeneous distribution of residual stresses (irrational twinning. kinking. and so on). Mechanical twinning in the narrow sense (regular. symmetrical lattice reorientation in response to me chanical stress) was for many years a specialist topic for mineralogists. petrographers. and crystallographers. Mineralogists and crystallographers carried out the study of the basic geometrical relationships in twinning; the principal names here are MUgge, Niggli. Johnsen. Reusch. Baumhauer. Churchman. Wallerant. Evans. and FriedeL The laws of mechanical twinning are now widely used in mineral identification and in elucidating the conditions of formation of rocks from the minerals they contain. The distribution of the twin bands in rock forming minerals enables one to establish the later processes that have occurred in the rock. Mechanical twinning is discussed by geOlogiSts and petrologists in the analYSis of flow effects. The importance of mechanical twinning in the plastic deformation and rupture of crystalline solids was W stressed by Academician V.I. Vernadskii in 1897 and by Kirpicheva ina paper entitled WFatigue in Metals in 1914.
Download or read book Strain Aging and Delayed Failure in High strength Steels written by E. A. Steigerwald and published by . This book was released on 1962 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spontaneous strain aging which occurs during tensile testing was examined for several high-strength steels. The results of smooth and notch tensile tests indicated that significant strain aging effects occurred in most high-strength steels in the 300 F to 800 F temperature range and this behavior was analogous to "blue brittleness" in mild steels. Constant load, stress rupture tests were conducted on the steels to determine the possible relationship between strain-aging embrittlement and delayed failure. Only the 300 M steel tested at 400 F exhibited an appreciable degree of delayed failure. This embrittlement, was extremely sensitive to test environment and was elimiriated when tests were conducted in argon. Although strain aging was not a sufficient condition to initiate delayed failure, it appeared to increase the severity of the environmental effects in the particular range where sufficient interstitial mobility existed.
Download or read book Deformation and Shear Band Development in an Ultrahigh Carbon Steel During High Strain Rate Deformation written by C. K. Syn and published by . This book was released on 2004 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mechanical response of a pearlitic UHCS-1.3C steel deformed at approximately 4000 s{sup -1} to large strains ({var_epsilon} = -0.9) has been studied. Failure, at both the macroscopic and the microscopic levels has been evaluated, and the ability of the material to absorb energy in compression has been examined. Failure occurred by the development of a shear band. However before failure, extensive buckling of the carbide plates was observed and the UHCS-1.3C material exhibited significant potential for compressive ductility and energy absorption due to the distributed buckling of these plates. Strain localization during adiabatic shear band development resulted in the formation of austenite. Subsequent cooling produced a divorced-eutectoid transformation with associated deformation, which resulted in a microstructure consisting of 50 to 100 nm sized grains. The stress-strain behavior within the shear band has also been determined. The results are used to critically evaluate the maximum shear stress criterion of shear band development. New criteria for the development of shear bands are developed based on a strain energy concept.
Download or read book Materials at High Strain Rates written by T.Z. Blazynski and published by Springer Science & Business Media. This book was released on 1987-07-31 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Failure Mechanisms in Alloys written by George A. Pantazopoulos and published by MDPI. This book was released on 2020-03-19 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: The era of lean production and excellence in manufacturing, advancing with sustainable development, demands the rational utilization of raw materials and energy resources, adopting cleaner and environmentally-friendly industrial processes. In view of the new industrial revolution, through digital transformation, the exploitation of smart and sophisticated materials systems, the need of minimizing scrap and increasing efficiency, reliability and lifetime and, on the other hand, the pursuit of fuel economy and limitation of carbon footprint, are necessary conditions for the imminent growth in a highly competitive economy. Failure analysis is an interdisciplinary scientific topic, reflecting the opinions and interpretations coming from a systematic evidence-gathering procedure, embracing various important sectors, imparting knowledge, and substantiating improvement practices. The deep understanding of material/component role (e.g., rotating shaft, extrusion die, gas pipeline) and properties will be of central importance for fitness for purpose in certain industrial processes and applications. Finally, it is hoped and strongly believed that the accumulation of additional knowledge in the field of failure mechanisms and the adoption of the principles, philosophy, and deep understanding of failure analysis process approach will strongly promote the learning concept, as a continuously evolving process leading to personal and social progress and prosperity.
Download or read book Metallurgical Applications of Shock Wave and High Strain Rate Phenomena written by Murr and published by CRC Press. This book was released on 1986-06-06 with total page 1134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emphasizing metallurgical and materials applications of shock-wave and high-strain-rate phenomena, this superb volume presents the work of the leading international authorities who examine the state of the art of explosive and related technologies in the context of metallurgical and materials processing and fabrication.
Download or read book Shock Wave and High Strain Rate Phenomena in Materials written by 0 Meyers, and published by CRC Press. This book was released on 2023-07-21 with total page 1852 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings of EXPLOMET 90, the International Conference on the Materials Effects of Shock-Wave and High-Strain-Rate Phenomena, held August 1990, in La Jolla, California, represent a global and up-to-date appraisal of this field. Contributions (more than 100) deal with high-strain-rate deforma
Download or read book Performance of Mechanical Properties of Ultrahigh Strength Ferrous Steels Related to Strain Induced Transformation written by Koh-ichi Sugimoto and published by MDPI. This book was released on 2020-11-19 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: A variety of topics concerning ultrahigh-strength ferrous steels were collected in this book. At present, most of the ferrous steels are applied to cold sheet parts. However, they may be used as the materials of hot-forged parts in the future, because of the excellent performance of the mechanical properties. It is hoped that many researchers will have an interest in the applications of the ferrous steels to the hot-forging parts.
Download or read book High Strain Rate High Strain Response of an Ultrahigh Carbon Steel Containing 1 3 C and 3 SI written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The mechanical response of a UHCS-1.3C material deformed at approximately 3000 s−1 to large strains (60%) has been studied. The influence of three different heat treatments, which resulted in pearlitic, martensitic and tempered martensitic microstructures, on the stress-strain response has also been examined. Failure, at both the macroscopic and the microscopic levels, and the ability of the material to absorb energy in compression have been evaluated. Failure for all heat treatments occurred due to shear localization. However, in the pearlitic condition, extensive buckling of the carbide plates was observed and the UHCS-1.3C material exhibited significant potential for compressive ductility (>60%) and energy absorption due to the distributed buckling of these plates. In the pearlitic condition, localization occurred due to adiabatic shear bands, in which austenite formed. Subsequent cooling produced a divorced-eutectoid transformation with associated deformation, which resulted in a microstructure consisting of 50 to 100 nm sized grains. The results show the large potential for use of UHCS in applications involving dynamic loading.
Download or read book Strain Rate Testing of Metallic Materials and Their Modelling for Use in CAE Based Automotive Crash Simulation Tools written by Paul K. C. Wood and published by Smithers Rapra Technology. This book was released on 2009-01 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to provide guidelines to generate tensile strain rate test data for ferrous and non-ferrous sheet metals for use in finite element based automotive crash simulation tools. Specifically, measurement of the strength hardening in a sheet material resulting from strain rate testing using a high speed servo hydraulic test machine. Additionally, to provide guidelines to process raw test data, fit material model and format this data for application in crash simulation tools. It is not within the scope of these recommendations to advocate a material model to fit to strain rate test results, although useful models are referenced. Rather to give guidance on the error allowance in fitting model to test results. These guidelines are expected to have broader application in the transport industry sector.
Download or read book Mechanics of Solid Polymers written by Jorgen S Bergstrom and published by William Andrew. This book was released on 2015-07-11 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Very few polymer mechanics problems are solved with only pen and paper today, and virtually all academic research and industrial work relies heavily on finite element simulations and specialized computer software. Introducing and demonstrating the utility of computational tools and simulations, Mechanics of Solid Polymers provides a modern view of how solid polymers behave, how they can be experimentally characterized, and how to predict their behavior in different load environments. Reflecting the significant progress made in the understanding of polymer behaviour over the last two decades, this book will discuss recent developments and compare them to classical theories. The book shows how best to make use of commercially available finite element software to solve polymer mechanics problems, introducing readers to the current state of the art in predicting failure using a combination of experiment and computational techniques. Case studies and example Matlab code are also included. As industry and academia are increasingly reliant on advanced computational mechanics software to implement sophisticated constitutive models – and authoritative information is hard to find in one place - this book provides engineers with what they need to know to make best use of the technology available. - Helps professionals deploy the latest experimental polymer testing methods to assess suitability for applications - Discusses material models for different polymer types - Shows how to best make use of available finite element software to model polymer behaviour, and includes case studies and example code to help engineers and researchers apply it to their work
Download or read book Elastomeric Polymers with High Rate Sensitivity written by Roshdy George S Barsoum and published by William Andrew. This book was released on 2015-07-01 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent investigations into blast-resistant properties of polyureas and other multi-phase polymeric elastomers indicate that they can dissipate broad bands of frequencies such as those encountered in blast events. In this unique book, Elastomeric Polymers with High Rate Sensitivity, Dr. Roshdy Barsoum and expert contributors bring together the cutting-edge testing methodologies, material properties, and critical design data for engineers seeking to deploy this technology. Where conventional methods of resisting blast, shockwave, and penetration are expensive, time-consuming and impractical, high-strain rate elastomeric polymers (HSREP) can be cheaper, quicker, and more easily applied to new and old materials alike. This book aids both military and civilian engineers in a range of applications, from buildings and tunnels to lightweight armor, ships, and aircraft. The book features constitutive models for software developers designing with these advanced polymers, as well as a discussion of the mechanisms of interaction between high-strain rate polymers and other materials. It also thoroughly covers HSREP engineering methods to achieve other unique properties, such as fireproofing. - Material properties and design data included to enable engineers to successfully deploy this technology - Cheaper, quicker, and more easily implemented than traditional methods of increasing blast and ballistic performance - A how-to guide to the engineering of high strain rate elastomeric polymers to achieve other useful properties, such as fireproofing
Download or read book Springer Handbook of Experimental Solid Mechanics written by William N. Sharpe, Jr. and published by Springer Science & Business Media. This book was released on 2008-12-04 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Springer Handbook of Experimental Solid Mechanics documents both the traditional techniques as well as the new methods for experimental studies of materials, components, and structures. The emergence of new materials and new disciplines, together with the escalating use of on- and off-line computers for rapid data processing and the combined use of experimental and numerical techniques have greatly expanded the capabilities of experimental mechanics. New exciting topics are included on biological materials, MEMS and NEMS, nanoindentation, digital photomechanics, photoacoustic characterization, and atomic force microscopy in experimental solid mechanics. Presenting complete instructions to various areas of experimental solid mechanics, guidance to detailed expositions in important references, and a description of state-of-the-art applications in important technical areas, this thoroughly revised and updated edition is an excellent reference to a widespread academic, industrial, and professional engineering audience.
