Download or read book Blast induced Stress Wave Propagation Through Unsaturated Sand written by Edward J. Villano and published by . This book was released on 1993 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Blast induced Stress Wave Propagation in Unsaturated Sand written by Nathan A. Dowden and published by . This book was released on 1995 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Wave Propagation in Unsaturated Sands Volume 1 Centrifuge Modeling written by Andy J. Walsh and published by . This book was released on 1993 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explosive model testing was conducted using a geotechnical centrifuge in order to simulate prototype stresses and ground motions in a representative cohesionless backfill. Models were constructed of sand and compacted moist to a constant void ratio using a vibratory technique. Exploding detonators were used to simulate contained bombs in the backfill material. The objective of this study was to determine the influence of moisture content, at the time of backfill compact ion, on blast induced stress wave propagation. Models were constructed to 1/18.9 and 1/26.3 scales. Explosives consisted of 1031 mg and 350 mg of PBX 9407 and were buried to depths of 7.6 cm and 5.4 cm respectively. These scaled models simulated prototype charges of 6.9 kg and 6.4 kg (7.8 kg and 7.3 kg TNT equivalent) at a depth of burial of 1.4 meters. Attenuation coefficients (n) show some influence with respect to saturation. Peak stress and peak particle acceleration intercepts at a scaled distance of one are lowest at 0 and 53 percent saturations and are maximum at 35 percent saturation. Peak particle velocity intercepts are lowest at 0 and 70 percent saturations and again are maximum at 35 percent saturation.
Download or read book Stress Wave Propagation in Unsaturated Sands written by E. J. Villano and published by . This book was released on 1993 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Wave Propagation in Sand Medium Induced by Blast Load written by Kenichi Noguchi and published by . This book was released on 1968 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Wave Propagation in Unsaturated Sands Volume 2 Field Explosive Tests written by Edward J. Villano and published by . This book was released on 1993 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explosive field tests were conducted in unsaturated Poudre Valley sand for the determination of peak ground shock parameters, propagation velocity and attenuation trends as a function of compactive saturation. The sand was compacted moist to a dry density of 1635 kg/cu.m at compactive saturation levels ranging from 0 to 70 percent. Three explosive masses of 6.22 kg, 7.0 kg and 0. 227 kg TNT equivalency were used at a depth of burial of 1.4 meters to provide scaled range (R/W(exp 1/3)) values ranging from 0.32 m/kg(exp 1/3) to 3.8 m/ kg(exp 1/3). Scaled peak particle acceleration, peak particle velocity, peak stress and propagation velocities are presented as a function of scaled range. Constants (Y-intercept at R/W(exp 1/3) = 1) taken from the developed empirical predictive equations for peak ground shock parameters are generally lower but follow the same trends as those of Tyndall Beach and Ottawa 20-30 sands obtained from centrifuge tests. Slope ( -n or n-1) values taken from the same predictive velocity intercepts are lowest at 0 and 13 percent compactive saturations.
Download or read book Stress Wave Propagation in Sand Medium Induced by Blast Load microfilm written by K. Noguchi and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shock Induced Stress Wave Propagation in Sand written by Ernest Theodore Selig and published by . This book was released on 1964 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study has been made to determine the characteristics of shock induced stress wave propagation in horizontal columns of dry sand confined under constant lateral pressure. The results of experiments in which stress-time histories were measured at several positions along the column were compared to calculated values based upon a nonlinear, inelastic theory of wave propagation. The theoretical results depend primarily upon the assumed stress-stain characteristics for the soil. The stressstrain characteristics considered in the analysis were based upon static stress-strain measurement, taking into account the effects of repeated loading. The modification of the static response by viscous effects and lateral inertia was also considered. The most difficult part of the experimental program was the accurate measurement of stress in the sand column. To accomplish this objective a development effort was undertaken as part of this research to obtain suitable gages and techniques for their use.
Download or read book High Intensity Compressive Stress Wave Propagation Though Unsaturated Sands written by Steven J. Pierce and published by . This book was released on 1989 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Wave Propagation in Unsaturated Sands written by A. J. Walsh and published by . This book was released on 1993 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Centrifuge Modling of Stress Wave Propagation in Unsaturated Sands written by Andy J. Walsh and published by . This book was released on 1993 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Preliminary Micromechanical Model for Stress Wave Propagation in Unsaturated Sands written by Dean B. Durkee and published by . This book was released on 1992 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 38 (thesis year 1993) a total of 13,787 thesis titles from 22 Canadian and 164 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 38 reports theses submitted in 1993, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.
Download or read book Constitutive Modeling for Blast Induced Wave Propagation written by Eric C. Drumm and published by . This book was released on 1985 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The description of stress-time history acting on a buried structure is a major source of error in the analysis of underground structures to weapons loadings. The stress wave propagating spherically from the weapon is attenuated as it travels from the source. This attenuation is a function of the inelastic response of the soil, and results in an increase in the loading rise time or decrease in the loading rate. Since the inelastic soil response is a function of the loading rate, a wave propagation analysis should be conducted to determine the stresses on the structure. At the interface between the soil and structure, the stress is modified further by soil-structure interaction effects. Thus, the stress on the structure is a function of both the structural and soil properties as well as the distance traveled by the stress wave. These related phenomena can be included in a numerical analysis, but the accuracy depends on the constitutive representation of the materials. One-dimensional wave propagation experiments and impact tests with various soils are reviewed, and the attenuation as a function of the soil stress-strain response is discussed. Keywords include: Dynamic loads, Hardened structures, Explosive effects, Underground structures, Conventional weapons, Dynamic structural response, and Interaction.
Download or read book Analytical Methods in Petroleum Upstream Applications written by Cesar Ovalles and published by CRC Press. This book was released on 2015-04-02 with total page 1351 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effective measurement of the composition and properties of petroleum is essential for its exploration, production, and refining; however, new technologies and methodologies are not adequately documented in much of the current literature. Analytical Methods in Petroleum Upstream Applications explores advances in the analytical methods and instrumentation that allow more accurate determination of the components, classes of compounds, properties, and features of petroleum and its fractions. Recognized experts explore a host of topics, including: A petroleum molecular composition continuity model as a context for other analytical measurements A modern modular sampling system for use in the lab or the process area to collect and control samples for subsequent analysis The importance of oil-in-water measurements and monitoring The chemical and physical properties of heavy oils, their fractions, and products from their upgrading Analytical measurements using gas chromatography and nuclear magnetic resonance (NMR) applications Asphaltene and heavy ends analysis Chemometrics and modeling approaches for understanding petroleum composition and properties to improve upstream, midstream, and downstream operations Due to the renaissance of gas and oil production in North America, interest has grown in analytical methods for a wide range of applications. The understanding provided in this text is designed to help chemists, geologists, and chemical and petroleum engineers make more accurate estimates of the crude value to specific refinery configurations, providing insight into optimum development and extraction schemes.
Download or read book Axisymmetric Stress Wave Propagation in Sand written by Richard Allen Wetzel and published by . This book was released on 1969 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Response of Soils to Dynamic Loadings written by Robert V. Whitman and published by . This book was released on 1970 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
