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 1967 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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 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 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 Tractive Performance of Wheels in Soft Soils written by and published by . This book was released on 1973 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: The traction developed by a wheel can be determined by appropriate integration of the soil wheel interface stresses. In soft soils these are governed by failure conditions in the soil brought about by the wheel load. The geometry of the two failure zones (front and rear), as well as the associated stresses, are computed by solving the differential equations of plasticity by numerical techniques. A flow diagram shows the computation of failure zones and associated interface stresses that yield the load, torque and traction for a given wheel geometry and interface friction. Slip-shear stress equations are used to relate interface friction to slip. The solution of the practical problem of determining traction and slip for given soil conditions and applied wheel load and torque requires an iteration procedure that is shown in another flow diagram. Inputs for the computer program are soil properties, wheel load, and torque; the end outputs are traction slip and sinkage. For the computation of traction exerted by tires, a soil-tire model has been developed that allows for the deflection of the tire and attendant restraint of the normal interface stresses.

Download or read book Power Requirements for Wheels Operating in Fine grained Soils written by Klaus-Jurgen Melzer and published by . This book was released on 1973 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Performance of Towed Wheels Operating in Turned Mode on Soft Soils written by Klaus-Jurgen Melzer and published by . This book was released on 1976 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tracks Versus Wheels in Soft Soil and Snow written by Waterways Experiment Station (U.S.) and published by . This book was released on 1964 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tracks Versus Wheels in Soft Soil and Snow written by and published by . This book was released on 1964 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance of Towed Wheels Operating in Turned Mode on Soft Soils written by Klaus-Jurgen Melzer and published by . This book was released on 1976 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of single, pneumatic-tired, towed wheels operating in turned mode was investigated in a pilot study. Ninety-nine one-pass tests were conducted in the laboratory on one clay and two air-dry sands with 8.50-10, 7.00-6, and 6.00-9 tires. Turn angles were 0, 5, 10, 15, and 20 deg; wheel loads were varied from about 1000 to 7000 N; and tire deflections were 0.15, 0.25, 0.35, and 0.40 of the undeflected tire section heights. Clay consistencies ranged from soft to medium stiff, with corresponding one penetration resistances between 255 and 543 kPa. Relative densities of the sands ranged from medium dense to very dense, with corresponding cone penetration resistance gradients ranging from 0.7 to 4.6 MPa/m. Performance expressed in terms of towed force coefficient, side force coefficient, resultant coefficient, lateral force/drag, sinkage coefficient, and slip is influenced by the following independent variables: turn angle, soil strength, tire deflection, wheel load, and the product of tire width and diameter. Trail moment and eccentricity of the resultant are influenced more or less similarly. For the ranges of the variables tested, the U.S. Army Engineer Waterways Experiment Station system of dimensionless parameters for predicting performance of towed wheels operating at zero turn angle on clay and on sand is extended to treat turn angles larger than zero. For this purpose, turn angle and mobility numbers for sand and clay, combined with additional independent dimensionless variables, are correlated with the aforementioned six performance parameters.

Download or read book Theory for Predicting Performance of a Wheel in Soft Soil written by John L. McRae and published by . This book was released on 1967 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mathematical Models of the Rigid Wheel on Soft Soil written by D. Schuring and published by . This book was released on 1969 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Armor written by and published by . This book was released on 1982 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: The magazine of mobile warfare.