Download or read book The Constitutive Behavior of Copper at High Strain Rate Determined by the Free Expansion Ring Test written by Shweta Gupta and published by . This book was released on 2013 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Study of deformation of materials at high strain rate is important to many industries. Several techniques exist to characterize materials at high strain rates but all of them have their limitations. The ring expansion technique is explored in this thesis. This technique can augment the scope of research in this field.

Download or read book High strain High strain rate Deformation of Copper written by Umberto Ramos de Andrade and published by . This book was released on 1993 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shock Compression of Condensed Matter 1991 written by S.C. Schmidt and published by Elsevier. This book was released on 2016-07-29 with total page 1103 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers collected together in this volume constitute a review of recent research on the response of condensed matter to dynamic high pressures and temperatures. Inlcuded are sections on equations of state, phase transitions, material properties, explosive behavior, measurement techniques, and optical and laser studies. Recent developments in this area such as studies of impact and penetration phenomenology, the development of materials, especially ceramics and molecular dynamics and Monte Carlo simulations are also covered. These latest advances, in addition to the many other results and topics covered by the authors, serve to make this volume the most authoritative source for the shock wave physics community.

Download or read book Metal Forming Processes written by Kakandikar Ganesh Marotrao and published by CRC Press. This book was released on 2022-08-25 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal forming processes include bulk forming and sheet metal forming with numerous applications. This book covers some of the latest developments aspects of these processes such as numerical simulations to achieve optimum combinations and to get insight into process capability. Implementation of new technologies to improve performance based on Computer Numerical Control (CNC) technologies are also discussed, including the use of CAD/CAM/CAE techniques to enhance precision in manufacturing. Applications of AI/ML, the Internet of Things (IoT), and the role of tribological aspects in green engineering are included to suit Industry 4.0. Features: Covers latest developments in various sheet metal forming processes Discusses improvements in numerical simulation with various material models Proposes improvements by optimum combination of process parameters Includes finite element simulation of processes and formability Presents a review on techniques to produce ultra-fine-grained materials This book is aimed at graduate students, engineers, and researchers in sheet metal forming, materials processing and their applications, finite element analysis, manufacturing, and production engineering.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1987 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shock Compression of Condensed Matter 2001 written by Michael D. Furnish and published by American Institute of Physics. This book was released on 2002-07-12 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part One and Part Two

Download or read book The Mechanical Properties of Copper at High Strain Rates Volume I the Effect of Strain Rate on the Flow Stress of Copper written by J. D. Lubahn and published by . This book was released on 1966 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental method of determining dynamic flow stress where the stress is homogeneous is developed using a pendulum bar suspension system. A small specimen is mounted on the end of one of the bars and the other bar is impacted on the free and of the specimen. For copper, the dynamic stress is 29% larger than the static stress for a strain rate of about 100/sec (or an increase in strain rate of about 5 orders of magnitude). For various tests, the increase in dynamic stress over the static value varied from 17% to 45%. This variation is comparable with the expected scatter for a typical test (plus or minus 10%) predicted from the uncertainties in measurement. (Author).

Download or read book 5th International Conference on Mechanical and Physical Behaviour of Materials Under Dynamic Loading written by and published by . This book was released on 1997 with total page 1132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Strain Rate Effects on Ultimate Strain of Copper written by and published by . This book was released on 1979 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: The strain-rate effect on strain to failure of copper was experimentally investigated. Both Oxygen Free High Conductivity (OFHC) copper and Electrolytic Tough Pitch (ETP) copper were studied. Ultimate strains were measured for a range of strain rates from 0.0001 strain/second to over 10000.0 strain/second. Normal quasi-static tensile machines were used at low strain rates, a split Hopkinson bar apparatus was used at strain rates of 1000.0 strain/second, and an exploding tube technique was developed for strain rates to over 10000.0 strain/second. High speed photographic techniques and post shot fragment analysis were used to determine the strain rate effects. Copper shows little strain rate dependence below 1000.0 strain/second with average ultimate strains around 0.4. Above approximately 5000.0 strain/second, several geometrical and material related factors cause the average ultimate strain to increase to values above 1.3, due to suppression of necking in the material until very late in the straining process. OFHC copper and ETP copper behave much the same to strain rates of 10000.0 strain/second.

Download or read book Impact Loading and Dynamic Behaviour of Materials written by C. Y. Chiem and published by . This book was released on 1988 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Influence of Annealing Temperature on the Strain Rate Sensitivity of Copper in Torsion written by Paul Edward Senseny and published by . This book was released on 1974 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of annealing temperature on the high strain rate behavior of OFHC copper and a tellurium doped free machining copper is investigated. The annealing temperatures studied include temperatures above and below as well as the recrystalization temperature. The torsional split Hopkinson bar is utilized to achieve shear strain rates up to 2,000/s with a rise time of ten microseconds. The resulting stress-strain curves are compared with those obtained at a strain rate of .0001/s. Specimens of OFHC copper are subjected to incremental strain rate tests so that the change in flow stress corresponding to an increase in strain rate can be evaluated for each specimen. It is concluded that the strain rate sensitivity is positive in nature for each temperature and that its magnitude depends on the annealing temperature. (Author).

Download or read book Metals Abstracts written by and published by . This book was released on 1999-04 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of the Mechanical Behavior of OFHC Copper in Tension at Various Strain Rates and Heating Rates Using the Two Dimensional Integrated Speckle Measuring System written by and published by . This book was released on 2000 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective was to investigate the mechanical behavior of oxygen-free high-conductivity (OFHC) copper in tension. A modified dog bone specimen was heated using resistive heating techniques. The effects of high temperature, medium strain rates, and high heating rates on the stress-strain results were observed. A new two-dimensional (2-D) integrated speckle measuring system and a high-speed optical pyrometer were utilized for strain and temperature measurements. Room temperature tests were conducted at strain rates of quasi-static and 1/s. The high heating rate experiments were conducted at temperatures of 360 deg C and 375 deg C, heating rates of 30 degrees C/s and 263 degrees C/s, and at a strain rate of 1/s. A nominal decrease in the elastic modulus and an increase in the elastic limit are seen for increasing strain rate. Decreases in yield stress and flow stress were observed as the heating rate was increased.

Download or read book High strain rate Deformation Mechanisms in Copper and Implications for Behavior During Shock wave Deformation written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A recently developed model for the deformation of copper is reviewed. The model separates the kinetics of structure evolution from those at constant structure and uses the mechanical threshold stress (yield stress at 0°K) as an internal-state variable. Predictions of the stress-strain behavior at high strain rates are compared with experimental results, and the potential application of the modeling procedure in the shock-wave regime is discussed.

Download or read book The Rate Dependence of Structure Evolution in Copper and Its Influence on the Stress strain Behavior at Very High Strain Rates written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A model for the deformation of copper over a wide range of strain rates has been modified to account for the contribution of dislocation drag at high strain rates. The main effect of adding this mechanism is found in the near yield region at strain rates exceeding 103 s−1. However, even at strain rates as high as 106 s−1 the rate controlling deformation mechanism at strains greater than roughly epsilon=0.1 is thermal activation. It is postulated that the high stresses predicted at yield when the strain rates are raised above 103 s−1 may lead to the rapid dislocation accumulation rates that have been found experimentally and which lead to the increased strain-rate sensitivity reported to copper and other metals at these strain rates.