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Author: Dean R. Freitag Publisher: ISBN: Category : Sand Languages : en Pages : 58
Book Description
Tire deflection data were studied from tests performed in tbe single-wheel test facilities at the U.S. Army Engineer Waterways Experiment Station, Vicksburg, Mississippi. The tests were performed with a smooth 11.00-20, 12-PR tubular tire moving under a 3000-lb load in mortar sand of various strengths and a smooth 9.00-14, 2-PR tubeless tire moving under an 890-lb load in Yuma sand of various strengths. Plots are presented of the path of a point on the center line of the tires relative to a moving and a fixed frame of reference. Representative plots are included to show the effect of slip, soil strength, and inflation pressure on the path and to compare the paths of a point on towed and powered tires.
Author: Dean R. Freitag Publisher: ISBN: Category : Sand Languages : en Pages : 58
Book Description
Tire deflection data were studied from tests performed in tbe single-wheel test facilities at the U.S. Army Engineer Waterways Experiment Station, Vicksburg, Mississippi. The tests were performed with a smooth 11.00-20, 12-PR tubular tire moving under a 3000-lb load in mortar sand of various strengths and a smooth 9.00-14, 2-PR tubeless tire moving under an 890-lb load in Yuma sand of various strengths. Plots are presented of the path of a point on the center line of the tires relative to a moving and a fixed frame of reference. Representative plots are included to show the effect of slip, soil strength, and inflation pressure on the path and to compare the paths of a point on towed and powered tires.
Author: R.N. Yong Publisher: Elsevier ISBN: 0444600485 Category : Technology & Engineering Languages : en Pages : 321
Book Description
The fundamental problem in the study of vehicle mobility is the development of traction between the vehicle and the supporting terrain. The mechanics of energy transfer will essentially control the final performance of the surficial machine. Determining and predicting the capability of a particular piece of machinery to traverse successfully a specific piece of terrain is very complex, particularly as the characteristics and properties of different types of terrain cover vary considerably, as do the many types of vehicle and their running gear.The material that forms the basis of this book has been gathered over many years of study both in the laboratory and in the field. It studies vehicle traction mechanics from the viewpoint of the interaction between the vehicle and the ground surface. The types of machines covered include earth-moving, forestry, agricultural, and construction machines. In addition, the mechanisms involved in the development of traction and the working of the terrain through cultivation, construction and surface disturbances are examined. The book also addresses the problems of off-road mobility and terrain trafficability, especially from the terrain-support and terrain interaction points of view. It is the authors' aim that the book will provide the reader with the ability to both analyze and predict the traction capability of his proposed machinery, and also to anticipate the kinds of reactions that will occur in the ground and at the ground surface.
Author: A. J. Koolen Publisher: Springer Science & Business Media ISBN: 3642690106 Category : Technology & Engineering Languages : en Pages : 252
Book Description
Compared with forces occurring in soil mechanics problems in civil engineering, the forces that are applied to soil in farming operations generally have a short duration, less than a few seconds, a small loaded area, no more than a few square decimeters, and small intensities, 10 bar being a high value. On the other hand, soil properties vary widely between those of a weak mud and a stone-like dry soil. Tillage and related applications of force to soil are practiced worldwide in farming. Tillage operations are performed on one hectare of land for every three human beings. This means that for the food production for each individual daily, something like one cubic meter of soil is stirred, or about 20 times his body weight. Theoretical knowledge of this most common human activity, which largely determines the surface shape of the fertile part of the earth, is still very limited. In this book the authors have tried to give an outline of the present state of the art. One of the starting points was a course in soil dynamics taught by the authors at the Agricultural University at Wageningen, The Netherlands. We hope to reach interested readers who have no more theoretical knowledge than high school level, as well as readers who want to go beyond the level of a third year university student. For the chapter on wheels and tires we received substantial support from F. G. J. Tijink of the Tillage Laboratory at Wageningen.
Author: Dean R. Freitag
Author: Dean R. Freitag
Author: R.N. Yong
Author: 
Author: U.S. Army Engineer Waterways Experiment Station
Author: Waterways Experiment Station (U.S.)
Author: United States. Army. Corps of Engineers
Author: M. E. Smith
Author: Leslie L. Karafiath
Author: Dvoralaio Wulfsohn
Author: A. J. Koolen