Download or read book Mechanics of Wheels on Soft Soils written by E. M. Leflaive and published by . This book was released on 1966 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanics of Wheels on Soft Soils written by E. M. Leflaive and published by . This book was released on 1965 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanics of Wheels on Soft Soils written by E. M. Leflaive and published by . This book was released on 1967 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanics of a Rigid Wheel on a Soft Soil written by D. Schüring and published by . This book was released on 1963 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanics of Wheels on Soft Soils written by E. M. Leflaive and published by . This book was released on 1966 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents a method for studying the results of tests with wheels in soils. The first part emphasizes the need for a framework to describe observed facts, and in the next part, a method is developed to provide this framework. The method considers the work of the pull developed by the test wheel as the difference between energy input and energy dissipation. The parameters used to represent these energies are explained relative to the theoretical case of a rigid wheel on a hard surface. This reference condition also is used to distinguish the particular features of rolling motion on deformable soils. (Author).
Download or read book Mechanics of Wheels on Soft Soils Report 2 Effect of Width on Rigid Wheel Performance written by E. M. Leflaive and published by . This book was released on 1967 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were run in an air-dried sand using three rigid wheels 28 in. in diameter and 12, 6, and 3 in. wide to determine the effect of wheel width on performance. Performance in the study was evaluated in terms of pull, torque, and dissipated energy. It was found that the width/diameter ratio influenced the rate of increase of torque energy at low slips, but at high slips, the slopes of the dissipated energy lines were approximately the same for all rigid wheels. An increase in load at a given high slip caused some changes in torque energy, and there was a load for which the torque energy was a minimum. The dissipated energy tended to increase with an increase in load, so the pull energy tended to decrease with an increase in load. Energy parameters measured in these tests with rigid wheels were compared with similar parameters from tests with pneumatic tires. In all cases, the pneumatic tire was found to be more efficient, with the better performance attributed mostly to a lower energy dissipation. (Author).
Download or read book Theory for a Towed Wheel in Soil written by John L. McRae and published by . This book was released on 1964 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report deals with one small phase of the problem of mobility for cross-country vehicles, namely a wheel being towed through soft soil. A new concept in soil mechanics is sought which will cope with the problem of the behavior of soil when massive displacements are involved, as occurs when a wheel cuts a deep rut in soft material. It is suggested that such movement of a soil is more in the nature of a flow phenomenon, and an energy-per-unit-volume concept is hypothesized in which the total energy spent (area under the load-sinkage curve) is divided by the net volume of soil displaced by a penetrating element. (Author).
Download or read book Wheels on Soft Soils written by Dean R. Freitag and published by . This book was released on 1965 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Mechanics of Rolling Resistance of Wheels in Soil written by S. J. Weiss and published by . This book was released on 1952 with total page 24 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 1967 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Qualitative Approach to the Pneumatic Tire soft Soil System written by Leland M. Kraft and published by . This book was released on 1967 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was directed toward obtaining a fundamental understanding of the tire-soil system from a qualitative investigation of the behavior of pneumatic tires operating in soft soils, using failure theories of classical soil mechanics. A series of powered-wheel, programmed-slip performance tests conducted in sand and clay were analyzed. The soil in contact with the tire is considered to be in a state of failure at all slips, and it is hypothesized that the characteristic shape of the pull-slip curve is not due to the increase in soil deformation, but to the rotation of the failure plane with respect to the tire-soil interface. Using some simple assumptions and the approximation that measured forces were uniformly distributed over the tire-soil contact surface, it is demonstrated that the hypothesis is a plausible one. A key element in the analysis is the determination of an angle theta that represents the angle of the tire contact surface relative to the horizontal. Using this angle and the forces measured in a test, a relation between the ratio of tangential and normal stresses and slip was developed. This relation is interpreted as a measure of the rotation of the failure plane. There appears to be a linear relation between theta and slip in sand, and a hyperbolic relation in clay. A discussion of slip is included as Appendix A. (Author).
Download or read book Theory of Ground Vehicles written by J. Y. Wong and published by John Wiley & Sons. This book was released on 2022-07-13 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: THEORY OF GROUND VEHICLES A leading and authoritative text for advancing ground vehicle mobility Theory of Ground Vehicles, Fifth Edition presents updated and expanded coverage of the critical factors affecting the performance, handling, and ride essential to the development and design of road and off-road vehicles. Replacing internal combustion engines with zero-emission powerplants in ground vehicles to eliminate greenhouse gas emissions for curbing climate change has received worldwide attention by both the vehicle industry and governmental agencies. To enhance safety, traffic flow, and operating efficiency of road transport, automated driving systems have been under active development. With growing interest in the exploration of the Moon, Mars, and beyond, research in terramechanics for guiding the development of extraterrestrial rovers has been intensified. In this new edition, these and other topics of interest in the field of ground vehicle technology are explored, and technical data are updated. New features of this edition include: Expanded coverage of the fundamentals of electric drives, hybrid electric drives, and fuel cell technology Introduction to the classification and operating principles of the automated driving system and cooperative driving automation Applications of terramechanics to guiding the development of extraterrestrial rovers Elaboration on the approach to achieving the optimal operating efficiency of all-wheel drive off-road vehicles Introduction to updated ISO Standards for evaluating vehicle ride An updated and comprehensive text and reference for both the educational and professional communities, Theory of Ground Vehicles, Fifth Edition will prove invaluable to aspiring and practicing engineers seeking to solve real-world road and off-road vehicle mobility problems.
Download or read book Introduction to the Mechanics of Space Robots written by Giancarlo Genta and published by Springer Science & Business Media. This book was released on 2011-10-27 with total page 613 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on lecture notes on a space robotics course, this book offers a pedagogical introduction to the mechanics of space robots. After presenting an overview of the environments and conditions space robots have to work in, the author discusses a variety of manipulatory devices robots may use to perform their tasks. This is followed by a discussion of robot mobility in these environments and the various technical approaches. The last two chapters are dedicated to actuators, sensors and power systems used in space robots. This book fills a gap in the space technology literature and will be useful for students and for those who have an interest in the broad and highly interdisciplinary field of space robotics, and in particular in its mechanical aspects.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1974 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Terramechanics written by T. Muro and published by CRC Press. This book was released on 2004-01-01 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Terramechanics is the broad study of terrain-vehicle systems. In this book, all physical processes associated with the static and dynamic interplay between powered and tooled wheeled or tracked vehicles with natural and man-made surfaces are analysed and mathematically modelled.The focus of the book is the technical problem of predicting the p
Download or read book Popular Mechanics written by and published by . This book was released on 1911-05 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Popular Mechanics inspires, instructs and influences readers to help them master the modern world. Whether it’s practical DIY home-improvement tips, gadgets and digital technology, information on the newest cars or the latest breakthroughs in science -- PM is the ultimate guide to our high-tech lifestyle.
Download or read book Popular Mechanics written by and published by . This book was released on 1911 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt:
