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1994 Fiscal Year Final Research Report Summary

Study on Dynamic Interaction between Machine/Plant and Soil

Research Project

Project/Area Number 04660265
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 農業機械
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

OIDA Akira  Kyoto Univ., Fac.of Agr., Assoc.Prof., 農学部, 助教授 (10026461)

Project Period (FY) 1992 – 1994
KeywordsTerramechanics / Soil rheology / Stress relaxation / Finite element method / Lugged wheel / Soil compaction / Vibration effect / Distinct element method
Research Abstract

Fundamental experiments on the dynamic response of soil such as the rheological behavior were conducted and at the same time the distinct element method was tried to be applied to simulate the dynamic behavior of soil. The interaction between machine parts and soil has been investigated theoretically mainly by using the FEM.In the case of the FEM,however, the soil is treated as a continuum. That results in difficulty to handle a discrete phenomenon such as the separation of soil blocks or particles which often occurs by the impact or transient action of machine parts on the soil.
Therefore, the application of the DEM would be more preferable than the FEM to clarify both interactions between machine and soil and between plant root and soil. Considering the root morphology, the movement of root tips and the growth would be able to be found as the result of the interaction between the root and the soil which will be found by the DEM.The final report was written in English with the following contents :
Chapter 1. Introduction, Chapter 2. Mechanical Properties of Soil, Chapter 3. Analysis of Rheological Behavior of soil, Chapter 4. Application of Finite Element Method to Find the Stress Relaxation of Soil, Chapter 5. Application of Finite Element Method to Find the Time-dependent Sinkage of Wheel, Chapter 6. Interaction between Lugs of Lugged Wheel and Soil Found by the Finite Element Method, Chapter 7. Effect of Deformation Speed on Soil Compaction (Interaction between Running Tire and Soil) , Chapter 8. Effect of Vibration on Soil Shear Strength (Interaction between Vibrating Tire and soil) , Chapter 9. Basic Study to Find the Interaction between Plant Root and Soil, Chapter 10. Conclusion and References.

  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] A.Oida and K.Triratanasirichai: "The rheological model of silt clay loam." International Agrophysics. 6. 65-76 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 笈田昭、山崎稔、他: "土の力学的性質に関する若干の実験結果について" テラメカニックス. 12. 7-12 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 山崎稔・笈田昭 他: "個別要素法による土の挙動の解析" 農業機械学会関西支部報. 78(発表予定). (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Oida and K.Triratanasirichai: "The rheological model of silt clay loam" International Agrophysics. 6. 65-76 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Oida, M.Yamazaki, et al.: "Some test results on dynamic properties of soil (in Japanese)" Journal of Japanese Society for Terramechanics. 12. 7-12 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Yamazaki, A.Oida et al.: "Analysis of soil behavior by the distinct element method (in Japanese)" Journal of Kansai Branch of JSAM. 78 (to be published). (1995)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1996-04-15  

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