| CHAPTER 1 INTRODUCTION | 第13-16页 |
| 1.1 Aspects of Agricultural Mechanization | 第13-14页 |
| 1.2 Soil-Tool Interfacial Tribological Phenomena | 第14页 |
| 1.3 Methods for Reducing Tribological Factors | 第14-15页 |
| 1.4 Objectives of the Study | 第15-16页 |
| CHAPTER 2 LITERATURE REVIEW | 第16-42页 |
| Glossary of Symbols | 第16-20页 |
| 2.1 Soil Tillage | 第20-21页 |
| 2.1.1 Main Factors Describing Performance of Soil-engaging Tools | 第20-21页 |
| 2.2 Soil-Tool Interaction | 第21-22页 |
| 2.3 Mechanics of Soil Cutting with Soil-engaging Tool | 第22-24页 |
| 2.4 Soil-Engaging Components of Crop Establishment Machines | 第24-27页 |
| 2.4.1 Types and Characteristics of Furrow Openers | 第24-26页 |
| 2.4.2 Design Criteria of Furrow Opener | 第26页 |
| 2.4.3 Performance of Furrow Openers | 第26-27页 |
| 2.5 Biomimetic Tribology | 第27-35页 |
| 2.5.1 Some Special Features of Soil-burrowing Animals | 第27-30页 |
| 2.5.2 Biomimetics in Anti-adhesion and Anti-friction against Soil | 第30-31页 |
| 2.5.3 Biomimetic Subsoiling | 第31-32页 |
| 2.5.4 Biomimetic Walking | 第32-35页 |
| 2.6 Finite Element Analysis of Soil-Tool Interaction | 第35-42页 |
| 2.6.1 Finite Element Method Concept | 第35页 |
| 2.6.2 Theoretical Approach for Finite Element Analysis and Virtual Work Theory | 第35页 |
| 2.6.3 Soil Models | 第35-39页 |
| 2.6.4 Non-Linearity Problem | 第39-40页 |
| 2.6.5 Models for Soil and Interface | 第40页 |
| 2.6.6 Two-Dimensional Soil Cutting Analysis | 第40-41页 |
| 2.6.7 Three-Dimensional Soil Cutting Analysis | 第41-42页 |
| CHAPTER 3 METHODOLOGY | 第42-64页 |
| 3.1 Geometrical Morphological Surfaces of Soil-Burrowing Animals | 第42-44页 |
| 3.1.1 Measurement of Radii of Curvature of Yellow Mouse Claw Sections | 第42-43页 |
| 3.1.2 Morphological Surface of Dung Beetle | 第43-44页 |
| 3.2 Biomimetic Designs of Soil-Engaging Components of Planting Machine and Bulldozing Blade | 第44-51页 |
| 3.2.1 Biomimetic Designs of Furrow Opener Surface | 第44-48页 |
| 3.2.2 Biomimetic Designs of Covering Devices and bulldozing blades | 第48-51页 |
| 3.3 Soil Tests | 第51-53页 |
| 3.4 Structural Analysis in ANSYS | 第53-56页 |
| 3.4.1 Material Definitions for Mesh Generation | 第53-54页 |
| 3.4.2 Boundary Conditions | 第54页 |
| 3.4.3 Solution of the Boundary Problem | 第54-55页 |
| 3.4.4 Post-processing | 第55-56页 |
| 3.5 Prediction of Furrow Opener Resistant Force and Power | 第56-59页 |
| 3.6 Preparation of Furrow Opener Model | 第59-60页 |
| 3.7 Experimental Work | 第60-64页 |
| CHAPTER 4 RESULTS AND DISCUSSION | 第64-84页 |
| 4.1 Effect of Non-Smooth Structures on Stresses Distribution on Furrow Opener | 第69-71页 |
| 4.2 Effect of Radius of curvature on Stresses Distribution on Covering Device and Bulldozing Blade | 第71-72页 |
| 4.3 Effect of Non-Smooth Structures on Stresses Distribution on Covering Device and Bulldozing Blade | 第72-75页 |
| 4.4 Resistance Force and Power Requirement for Conventional Surface Furrow Opener and Opener Surface with UHMWPE Tubular Section Ridges | 第75-84页 |
| CHAPTER 5 AGRICUTURAL AND MECHANIZATION STATUS IN SUDAN AND POTENTIAL APPLICATIONS OF BIOMIMETIC TECHQIUES | 第84-100页 |
| 5.1 Introduction | 第84-85页 |
| 5.2 Agricultural Potential of Sudan | 第85-88页 |
| 5.2.1 Climate and soil of Sudan | 第85页 |
| 5.2.2 Water resources in Sudan | 第85-86页 |
| 5.2.3 Farming systems | 第86-88页 |
| 5.3 Agricultural Mechanization Level in Sudan | 第88-91页 |
| 5.3.1 Mechanization of small scale farms | 第88页 |
| 5.3.2 Mechanization of large scale rain–fed farms | 第88-89页 |
| 5.3.3 Mechanization of farms under irrigated schemes | 第89-91页 |
| 5.4 Energy in Agriculture in Sudan | 第91-92页 |
| 5.5 Operators’Training and Management | 第92-93页 |
| 5.6 Constraints of Agricultrual Mechanization in Sudan | 第93-97页 |
| 5.6.1 Agricultural investment | 第93页 |
| 5.6.2 Land | 第93-96页 |
| 5.6.3 Capital | 第96-97页 |
| 5.6.4 Infrastructure | 第97页 |
| 5.6.5 Energy and maintenance | 第97页 |
| 5.6.6 Training and machinery testing | 第97页 |
| 5.7 Potential Applications of Biomimetic Techniques in Sudan | 第97-100页 |
| CHAPTER 6 CONCLUSION AND RECOMMENDATIONS | 第100-106页 |
| 6.1 Conclusion | 第100-104页 |
| 6.2 Recommendations | 第104-106页 |
| REFERENCES | 第106-116页 |
| APPENDIX A | 第116-130页 |
| APPENDIX B | 第130-140页 |
| APPENDIX C | 第140-150页 |
| ACADEMIC ACHIEVEMENTS DURING STUDY | 第150-152页 |
| ACKNOWLEDGMENT | 第152-153页 |
| ABSTRACT | 第153-157页 |
| 摘要 | 第157-160页 |
