Download or read book Study of Wave Propagation in Confined Soils written by D. Hampton and published by . This book was released on 1968 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theoretical Studies of Stress Wave Propagation in Laterally Confined Soils written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to overcome the mathematical difficulties in the solution of one-dimensional stress wave propagation in soils, real soil stress-strain relationships are often idealized by various simple mathematical models. A considerable body of scientific literature on one-dimensional stress wave propagation for such models has been published in recent years by various researchers, both in the United States and abroad. The pertinent literature applicable to one-dimensional stress wave propagation in soils are collected and studied in detail. Comparative studies are made with the various mathematical models for a wave propagation problem. Fortran computer programs for each of the analytical solutions are included as appendixes.
Download or read book Theoretical Studies of Stress Wave Propagation in Laterally Confined Soils written by Behzad Rohani and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to overcome the mathematical difficulties in the solution of one-dimensional stress wave propagation in soils, real soil stress-strain relationships are often idealized by various simple mathematical models. A considerable body of scientific literature on one-dimensional stress wave propagation for such models has been published in recent years by various researchers, both in the United States and abroad. The pertinent literature applicable to one-dimensional stress wave propagation in soils are collected and studied in detail. Comparative studies are made with the various mathematical models for a wave propagation problem. Fortran computer programs for each of the analytical solutions are included as appendixes.
Download or read book Stress Wave Propagation in Confined Soils written by Delon Hampton and published by . This book was released on 1966 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studying Shock Wave Propagation in the Soil written by N. Zhubayev and published by . This book was released on 1965 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book STUDY OF THE DYNAMIC STRESS STRAIN AND WAVE PROPAGATION CHARACTERISTICS OF SOILS REPORT 2 CORRELATION OF STRESS STRAIN AND WAVE PROPAGATION PARAMETERS IN SHOCK LOADING DRY SANDS written by and published by . This book was released on 1964 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wave propagation studies conducted on laterally confined columns of three granular materials which exhibit nonlinear stress-strain behavior are described. Under these conditions, axial and lateral stresses and strains, wave velocities, and particle velocities measured at points along the column are reported. A new technique for measuring free-field displacements without physically contacting the soil is also described. A correlation between the moduli computed from the stress wave velocity, particle velocity, and the secant drawn to the stress-strain curve is presented. Relationships between stress, strain, wave velocity, and particle velocity are shown to be such that if any two of the parameters are known, the other two may be determined. Comparison of the data is made with the Hertzian theory relating confining stress to wave velocity or constrained modulus. Several interesting though preliminary observations on stress precursors resulting from initial axial stresses are presented. Based on these observations, an explanation is presented for the disparity between moduli based on constrained compression tests and those back- figured from seismic velocities.
Download or read book Wave propagation Studies in Laterally Confined Columns of Sand written by Warren J. Baker and published by . This book was released on 1967 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study of the relationship between pertinent wave-propagation parameters and the one-dimensional stress-strain behavior of two sands was conducted. The stress-strain relation for the sands was characterized by a nonlinear strain-hardening behavior. The nature of the stress-strain curve implied that shocks should form or be sustained in the soil. This phenomenon was studied by observing the dynamic and kinematic characteristics generated by a soft-fronted stress pulse applied at one end of a long slender column of laterally confined sand. To develop a method of predicting the kinematics of wave propagation from the stress-strain curve, the observed wave-propagation parameters were related to laboratory stress-strain curves. A unique sample container, loading system, and instrumentation system was developed. The experiments approximated one-dimensional conditions up to reflected stresses of 1,600 psi. The results indicated the shocking-up of the soft-fronted input pulse that could be predicted from the laboratory stress-strain curve. The particle-velocity versus wave-velocity relationships dictated the change in shape of the kinematic pulse and could be predicted using a secant modulus analysis technique. A very high stress versus time gradient (rise times less than 50 microsec) was observed to form as the wave propagated through the soil.
Download or read book Study of the Dynamic Stress strain and Wave propagation Characteristics of Soils written by and published by . This book was released on 1964 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of the Dynamic Stress strain and Wave propagation Characteristics of Soils written by W. L. Durbin and published by . This book was released on 1965 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes three types of constrained compression tests, and results thereof, on dry sands. In most tests, lateral confinement was provided by a ring boundary that inhibits radial displacements while offering little resistance to axial strains. In addition, comparisons are made between results of tests in this boundary and those in the United Research Service fluid boundary. Stress-time and displacement-time records obtained from interior points along the column, indicating shocking-up, are included. Predicted peak particle velocities and shock-wave propagation velocities based on the stress-strain data are presented and compared with measured values. (Author).
Download or read book Stress Propagation in Soils written by L. Seaman and published by . This book was released on 1963 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: A knowledge of soil motions resulting from nuclear explosions is necessary for the design of underground structures which are to survive a nuclear attack. In this project the authors studied wave propagation in soil and developed methods for predicting wave propagation phenomena based on data from laboratory compression tests on soil samples. The study was restricted to one-dimensional wave propagation in a sand and a clay. Extensive wave propagation tests were made on 5-meter columns of Monterey sand of various densities subjected to transient loads of different intensities and duration. Stresses and particle velocities were measured at various locations in the column to test the validity of theoretical models representing sand. The main feature of stress wave propagation--stress attenuation--can be predicted for sand on the basis of a rate-independent model. In addition, wave front development, wave velocity, particle velocity attenuation, and duration of the stress wave are described qualitatively by this model in combination with a second rate-independent model. The parameters of the models can be determined from static or dynamic compression test data on small samples of sand. (Author).
Download or read book A Numerical Study of Wave Propagation in a Confined Mixing Layer by Eigenfunction Expansions written by Institute for Computer Applications in Science and Engineering and published by . This book was released on 1993 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elastodynamics written by A.C. Eringen and published by Рипол Классик. This book was released on 1974 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the inception of the theory of elasticity with Navier A821) and Cauchy A828), the dynamical problems of elasticity and the subject of wave propagations in elastic solids have been under intense study by a large number of workers. In fact the literature is so extensive that any desire to write accounts on the subject immediately induces discouragement on the part of a prospective author. For it is impossible to do justice to all aspects of this wide field in any one- or two-volume treatise. Perhaps, partially, it is this concern that kept this important field barren of books for nearly two centuries.
Download or read book Preliminary Evaluation of Earth Targets for Use in Impact Effects Studies written by Louis Jean Thompson and published by . This book was released on 1964 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Aerospace Nuclear Safety Program at Sandia Corporation requires an independent assessment of the safety of all nuclear power supplies used in aerospace under all conditions from factory shipment through re-entry from space. The effects of impact against any point on the earth by a nuclear power supply or its components must be evaluated as part of this assessment. This report: (1) evluates the fundamental mechanisms involved in soil impacts by cylindrical projectiles with velocities of 500-700 feet per second; (2) defines the problem of specifying impact targets which closely simulate various portions of the earth's surface; and (3) describes an analytical and experimental program intended to obtain the information needed to properly specify a simulated earth target for use in Aerospace Nuclear Safety impact tests.
Download or read book Elastic and Electromagnetic Wave Propagation written by Jeffrey Mark Schneider and published by . This book was released on 2007 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1967 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of GeoShanghai 2018 International Conference Fundamentals of Soil Behaviours written by Annan Zhou and published by Springer. This book was released on 2018-05-10 with total page 1026 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the second volume of the proceedings of the 4th GeoShanghai International Conference that was held on May 27 - 30, 2018. The book, entitled “Fundamentals of Soil Behaviours”, presents the recent advances and technology in the understanding and modelling of fundamentals of soil’s behaviours. The subject of this book covers a wide range of topics related to soil behaviours in geotechnical engineering, geoenvironmental engineering and transportation engineering. The state-of-the-art theories, methodologies and findings in the related topics are included. This book may benefit researchers and scientists from the academic fields of soil and rock mechanics, geotechnical engineering, geoenvironmental engineering, transportation engineering, geology, mining and energy, as well as practical engineers from industry. Each of the papers included in this book received at least two positive peer reviews. The editors would like to express their sincerest appreciation to all of the anonymous reviewers all over the world, for their diligent work.
Download or read book Study of the Dynamic Stress strain and Wave propagation Characteristics of Soils written by James V. Zaccor and published by . This book was released on 1964 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The general approach, physical concepts, and methods employed in the actual development of the equipment are discussed. The equipment and its capabilities are described. A brief summary of concurrent reports that describe results of studies of response in granular media is presented. The summary indicates that the significant parameters have been correctly identified from theoretical mechanics and suitably measured, since results demonstrate relationships between stress-strain behavior and propagating waves in laboratory devices. The report also summarizes the broad range of protective construction problems which lend themselves to study in this equipment. These include such studies as the effects of reflection phenomena, the effects of layered media, soil-structure interaction in a high-stress field, and the evaluation of disturbances in free-field conditions caused by the presence of a gauge. The latter is shown to be possible by virtue of the ability to measure soil response without placing a gauge in the soil or attaching one to the sample. (Author).
