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road interaction
ABSTRACTS - - INTERNATIONAL CONFERENCE ON SOIL DYNAMICS Abstract No. 64
185
HOW TO PREDICT THE SOIL COMtlIACTION OF AGRICULTURAL TIRES INGO H. BOLLING Research and Teaching Assistant, Department of Agriculture Machinery Technical University of Munich, Federal Representative of Germany
A concept how to proceed in predicting soil compaction with regard to agricultural machinery, tire and soil is proposed. This approach should provide criteria for vehicle and tire choice as well as criteria for the choice of soil testing equipment. One should stress the point, that the concept till now was only tested for few kinds of soil. Therefore the application to other soil types has to start with one of the proposed "soil calibration tests". Abstract No. 65
A STUDY OF THE MOTION RESISTANCE OF TRACKED VEHICLES CHEN BINGCONG, FAN YACAO NING SUJIAN Professor, Vice President of Jilin University of Technology Associate Professor of Hebei Institute of Technology Instructor of Jilin University of Technology People of Republic of China
This paper, through experiment and study on slipsinkage of single track plate, worked out an empirical formula on dry sand and, based on it, formed the theoretical sinkage predict formula for crawler vehicle. Furthermore, a mathematic model for motion resistance of crawler vehicle considering the effect of slipsinkage is formed through theoretical analysis on motion resistance. Whole vehicle testing on dry sand shows that the predicting values of vehicle sinkage and motion resistance have conformability with the values measured. Abstract No. 66
TUNING DESTRUCTIVE ENERGY OUT OF VEHICLE/ROAD INTERACTION LEONARD B. DELLA-MORETI"A - Industrial Engineer USDA-Forest Service Equipment Development Center 444 East Bonita Avenue - - San Dimas, CA 91773 HENRY C. HODGES President Hodges Transportation, Inc. P. O. Box 234 - - Carson City, Nevada 89701 -
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Waste automotive energy from mismatched road/tire/vehicle combinations is emerging as a primal cause of high maintenance costs and shortened road and vehicle lives. The mechanisms for healing of roads by reduction of tire pressures and slips - - and their cyclic variations - - and the benefits of both roads and vehicles are examined. Current developments in tire and suspension systems have created a new dimension for reducing damage and healing roads by traffic. Abstract No. 67
A REVIEW OF SUBSOIL COMPACTION AND CROP RESPONSE S. GAMEDA, G. S. V. RAGHAVAN,E. McKYES and R. THERIAULT* Agricultural Engineering Department Macdonald College of McGill University Ste. Anne De Bellevue, Quebec, Canada H9X ICO *Agriculture Canada Research Station St-Jean-sur-Richelieu, Quebec, Canada J3B 6Z8
The effect of heavy machinery on subsoil compaction and crop response is reviewed. Topsoil and subsoil compaction is differentiated on the basis of the different processes that take place in each zone. The response of soils with various structural and textural properties to heavy axle loads and the resulting effects on crop growth and yields are discussed. The alleviation of subsoil compaction by nature weathering forces and deep tillage methods is examined and some of the analytical studies carried out to aid in the understanding of compactive processes are introduced. Abstract No. 68
FIELD TESTING OF A SOIL COMPACTION MODEL
S. C. GUPTA, A. HADAS, W. B. VOORHEES, D. WOLF, W. E. LARSON and E. C. SCHNEIDER Agricultural Research Service, St. Paul, MN, U.S.A.; Agricultural Research Organization, Bet Dagan, Israel; Agricultural Research Service, Morris, MN, U.S,A.; Technion-Israel Institute of Technology, Haifa, Israel; and University of Minnesota, St. Paul, MN, U.S.A.
185
HOW TO PREDICT THE SOIL COMtlIACTION OF AGRICULTURAL TIRES INGO H. BOLLING Research and Teaching Assistant, Department of Agriculture Machinery Technical University of Munich, Federal Representative of Germany
A concept how to proceed in predicting soil compaction with regard to agricultural machinery, tire and soil is proposed. This approach should provide criteria for vehicle and tire choice as well as criteria for the choice of soil testing equipment. One should stress the point, that the concept till now was only tested for few kinds of soil. Therefore the application to other soil types has to start with one of the proposed "soil calibration tests". Abstract No. 65
A STUDY OF THE MOTION RESISTANCE OF TRACKED VEHICLES CHEN BINGCONG, FAN YACAO NING SUJIAN Professor, Vice President of Jilin University of Technology Associate Professor of Hebei Institute of Technology Instructor of Jilin University of Technology People of Republic of China
This paper, through experiment and study on slipsinkage of single track plate, worked out an empirical formula on dry sand and, based on it, formed the theoretical sinkage predict formula for crawler vehicle. Furthermore, a mathematic model for motion resistance of crawler vehicle considering the effect of slipsinkage is formed through theoretical analysis on motion resistance. Whole vehicle testing on dry sand shows that the predicting values of vehicle sinkage and motion resistance have conformability with the values measured. Abstract No. 66
TUNING DESTRUCTIVE ENERGY OUT OF VEHICLE/ROAD INTERACTION LEONARD B. DELLA-MORETI"A - Industrial Engineer USDA-Forest Service Equipment Development Center 444 East Bonita Avenue - - San Dimas, CA 91773 HENRY C. HODGES President Hodges Transportation, Inc. P. O. Box 234 - - Carson City, Nevada 89701 -
-
Waste automotive energy from mismatched road/tire/vehicle combinations is emerging as a primal cause of high maintenance costs and shortened road and vehicle lives. The mechanisms for healing of roads by reduction of tire pressures and slips - - and their cyclic variations - - and the benefits of both roads and vehicles are examined. Current developments in tire and suspension systems have created a new dimension for reducing damage and healing roads by traffic. Abstract No. 67
A REVIEW OF SUBSOIL COMPACTION AND CROP RESPONSE S. GAMEDA, G. S. V. RAGHAVAN,E. McKYES and R. THERIAULT* Agricultural Engineering Department Macdonald College of McGill University Ste. Anne De Bellevue, Quebec, Canada H9X ICO *Agriculture Canada Research Station St-Jean-sur-Richelieu, Quebec, Canada J3B 6Z8
The effect of heavy machinery on subsoil compaction and crop response is reviewed. Topsoil and subsoil compaction is differentiated on the basis of the different processes that take place in each zone. The response of soils with various structural and textural properties to heavy axle loads and the resulting effects on crop growth and yields are discussed. The alleviation of subsoil compaction by nature weathering forces and deep tillage methods is examined and some of the analytical studies carried out to aid in the understanding of compactive processes are introduced. Abstract No. 68
FIELD TESTING OF A SOIL COMPACTION MODEL
S. C. GUPTA, A. HADAS, W. B. VOORHEES, D. WOLF, W. E. LARSON and E. C. SCHNEIDER Agricultural Research Service, St. Paul, MN, U.S.A.; Agricultural Research Organization, Bet Dagan, Israel; Agricultural Research Service, Morris, MN, U.S,A.; Technion-Israel Institute of Technology, Haifa, Israel; and University of Minnesota, St. Paul, MN, U.S.A.