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Mathematical Model Development for Predicting Resistance Forces Exerted on a Single Shank during Earth Cutting
2003
International Conference on Aerospace Sciences and Aviation Technology
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In this paper a study is carried out to develop a mathematical model to predict resisting forces exerted on the single shank during cutting the earth based on the blade geometry parameters, operating conditions ...
A computer program "SHANK" was made on the basis of this analytical study using a professional mathematical package. ...
from effects above the surface
INTRODUCTION Tool shape factors have a considerable effect on earth resistance forces during cutting. ...
doi:10.21608/asat.2013.24431
fatcat:3osmm7ohgvgormwwuhfmmvtw7a
Analysis of the energy consumption of a rotary harrow
2021
Journal of Agricultural Engineering
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A proper use of a rotary harrow depends on its geometry and on the working parameters, such as: drag speed and angular speed. ...
The model, validated through comparison with some experimental data, was then used to analyze the forces exchanged between the tines and the soil as a function of the drag speed, the angular speed and ...
Therefore, the rotor of the rotary harrow was modeled as two tines, positioned on a disk, as this is the effective geometry used by the constructors. Figure 1 shows a view of the model of a rotor. ...
doi:10.4081/jae.2021.1132
fatcat:uhzmz6suondrva5epbwq3oy7wq
Study on the Interaction between Soil and the Five-Claw Combination of a Mole Using the Discrete Element Method
2018
Applied Bionics and Biomechanics
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In this study, we simulated the soil cutting process of the five-claw combination using the discrete element method (DEM) as an attempt for the potential design of soil-engaging tools to reduce soil resistance ...
The curve of the soil rupture distance ratio with rake angles could be better described using a quadric function, but the speed had little effect on the soil rupture distance ratio. ...
[5] showed that a biomimetic disc designed based on the profile curves of the second claw performed better in structural strength and cutting efficiency using finite element analysis. Tong et al. ...
doi:10.1155/2018/7854052
pmid:30159028
fatcat:ahlxzom6qnha5el7thjqlshkni
Kinetics and Dynamics of the Stiff and Flexible Tines with the Duckfoot and the Coulter after Impact with Stones Embedded in Compacted Soil. Part II
2022
Materials
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For both soil conditions, the kinetics of the flexible tine was 24 times more reactive, and the dynamic loads were two times lower than for the stiff tine. ...
The kinetics and dynamics of the stiff and flexible tines with the duckfoot and the coulter after impact with stones embedded in compacted soil were examined. ...
The effects of improving the soil structure as well as loosening and mixing the soil depend on the type of tool and its geometry. ...
doi:10.3390/ma15041351
pmid:35207892
pmcid:PMC8875634
fatcat:thv7jyxcmffjznvnqkud4eyfye
Effect of Stone Impacts on Various Ground Engaging Tools (Flexible/Stiff Tines and Coulter): Part I
2022
Materials
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After the impact with the stiff tine, the stones were thrown the greatest distance of 0.26–1.08 m, and these distances were strongly dependent on the working speed and slightly dependent on the working ...
The characteristics of stone movement were specific to the type of tool and were described by the Numerical Stone Movement Scale developed for the purpose of the research. ...
Materials resistant to abrasion, thermo-chemical treatments increasing resistance to variable loads, and shapes with variable geometry both for tines or shafts and working elements are used. ...
doi:10.3390/ma15041568
pmid:35208108
pmcid:PMC8875980
fatcat:an6zcnq5mnbavmd5hthqqc7yky
Prediction of the immediate effects of traffic on field soil qualities
1990
Soil & Tillage Research
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Damsté of the Department of Mathematics of the Wageningen Agricultural University for their help in analysing strain algebraically and processing the experimental data. ...
ACKNOWLEDGEMENTS The authors wish to acknowledge Prof. Dr. B. van Rootselaar and Dr. B.R. ...
The penetration resistance is expressed as the cone index, being the quotient of the mean vertical force during penetration and the cone-base area ( [MPa] ). ...
doi:10.1016/0167-1987(90)90027-b
fatcat:wqb7p5upbzdezj6rrt4dyxr45m
Working Performance of the Low-Adhesion and Anti-Slip Bionic Press Roller in the Rice–Wheat Rotation Area
2022
Agriculture
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The field tests were carried out, and the orthogonal test was used to investigate the effects of forward speed, load, and structural parameters on the operation performance of the bionic press roller. ...
During the working process of a conventional press roller in the rice–wheat rotation area, the phenomenon of soil adhesion and a large slip rate, which are directly related to the growth and the output ...
Definition of tine trajectory and parameters.
Figure 6 . 6 Figure 6. Bionic press roller.
Figure 7 . 7 Figure 7. Finite element model of roller and soil.
Figure 8 . 8 Figure 8. ...
doi:10.3390/agriculture12060750
fatcat:ahlto36mkvbjxp6uljj54ayqti
Design, Development, and Performance Evaluation of a Trash-Board Moldboard Plow for the Interaction between Soil and Straw with Two Different Water Content Levels
2016
Agronomy
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Crop residue standing above the soil surface is five to ten times more effective in preventing wind erosion than the same mass of residue lying flat on the soil surface [18] . ...
Using the moldboard plow increases energy consumption, which decreases the impedance of soil; therefore, it is effective in improving crops' growth [17] . ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/agronomy6020030
fatcat:le77whpy6zgkxjxta44gmno2o4
Animating sand as a fluid
2005
ACM SIGGRAPH 2005 Papers on - SIGGRAPH '05
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To allow for efficiently scaling up to large volumes of sand, we abstract away the individual grains and think of the sand as a continuum. ...
Our core representation is a cloud of particles, which allows for accurate and flexible surface tracking and advection, but we use an auxiliary grid to efficiently enforce boundary conditions and incompressibility ...
And I want to thank Professor Ian Mitchel who has carefully read the thesis, and proposed valued suggestions. ...
doi:10.1145/1186822.1073298
fatcat:yukmkjksljbmzalsex6jkp2ofm
Shock and vibration computer programs: Reviews and summaries
1976
International Journal of Mechanical Sciences
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Their efforts have been massive, requiring the collection of information on available programs, the preparation of questionnaires for program developers and users, the critical review of the programs' ...
The methods used for solving dynamics problems are outlined and the techniques employed for incorporating various material properties are scrutinized. ...
The discussion of these methods is limited to finite element techniques and the finite elements used for piping analysis are briefly described. ...
doi:10.1016/0020-7403(76)90049-7
fatcat:kcqc5spzrzarnj6d3myaah3zda
Testing and Data Recovery Excavations at 11 Native American Archeological Sites Along the U.S. Highway 271 Mount Pleasant Relief Route, Titus County, Texas Volume II
2014
Index of Texas Archaeology Open Access Grey Literature from the Lone Star State
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The primary relevant historic context for future work on this project is The Development of Agriculture in Northeast Texas Before a.d. 1600 (Kenmotsu and Perttula 1993). ...
houses, on individual house lots, within villages, between one or more contemporaneous villages, and as villages and other components of the settlement system (e.g., field houses, mounds, cemeteries, ...
Macrobotanical Analysis Manchaca, Texas
Acknowledgments We acknowledge Tim Ferguson for his role in preparing the samples for irradiation. ...
doi:10.21112/ita.2014.1.65
fatcat:yqhcqrirqjhklkmxdoqaoa7kje
Soil mineralogy
[chapter]
2008
Encyclopedia of Earth Sciences Series
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The circular tubing changes to a slight oval shape, which becomes stabilized because the soil on the sides of the tubing resists the outward movement. ...
An increase in penetration resistance results in a reduction of the root length per unit surface area. ...
Current agriculture as practiced in the industrialized world is heavily dependant on the energy of fossil fuels, and for that reason (if for no other) is inherently unsustainable. ...
doi:10.1007/978-1-4020-3995-9_545
fatcat:elhefyvm7zg33gbhcto3k5xcfi
Sabkha
[chapter]
2008
Encyclopedia of Earth Sciences Series
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The circular tubing changes to a slight oval shape, which becomes stabilized because the soil on the sides of the tubing resists the outward movement. ...
An increase in penetration resistance results in a reduction of the root length per unit surface area. ...
Current agriculture as practiced in the industrialized world is heavily dependant on the energy of fossil fuels, and for that reason (if for no other) is inherently unsustainable. ...
doi:10.1007/978-1-4020-3995-9_495
fatcat:56c5y4pybzggfcqfy66kzmke2u
Expedition 381 methods
[chapter]
2019
Proceedings of the International Ocean Discovery Program
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the reading, the value of which corresponds to the penetration resistance. ...
Once the tool descended into the hole, the heave compensation system of the ship limited vertical movement of the rooster box and logging sheave to less than 10 cm. ...
doi:10.14379/iodp.proc.381.102.2019
fatcat:ja5wa6epuzhvrncrvzhdiynr3i
ÖBG-MitteilungenHeft53
1996
Zenodo
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Acknowledgrnents : the author of this paper could not have written this paper without the dedicatio'n of the coordinators and all the scientists, both from the EU and Associated Countries and from the ...
References Specific:
Acknowledgements Funding by the Ministry of Environment of the State Baden-Württemberg is .gratefully . acknowledged. ...
If the effects of such changes on the appropriate rate constant can be estimated, then a useful sensitivity analysis can be obtained. ...
doi:10.5281/zenodo.5516412
fatcat:hydw2rifw5fejfji52m67mmuiu
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