| Author | Patil, Suhas Laxman |
| Call Number | AIT Thesis no.AE-05-01 |
| Subject(s) | Plowing--Simulation methods
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AE-05-01 |
| Abstract | A Distinct Element Methods (DEM) simulation model of soil deformation by tine
in a soil bin system was developed. To test of the feasibility of this technique, a series of
DEM simulations were conducted using several thousand particles within soil bin
boundaries. Soil particles are represented as circular bodies with tine as moving wall.
Simulated model of DEM for soil-tine interaction using VB 6.0 and SQL server
technology provided good user interface and functionality. Program generated pictures of
each step, which were easy to validate The simulation was done by taking the sandy soil
with the average size (D50) of 0.37 mm with uniformity co-efficient (D60/D10) of 2.34.
This simulation qualitatively and quantitatively reproduced the force distance behaviour
and soil failure pattern. These were validated with the actual results and also the distinct
formation of soil wedge.
The soil failure for all the simulation was by progressive shear. The shear surface
emerged from tool tip horizontally and after a distance of about 5 to 10 cm it progressed
towards the soil surface. During simulation it was observed that soil below the tool tip
remained undisturbed in all the experiments, which was also observed by Pathak (1991).
Average shear angle was 27±2° for all the tools studied which was very close to
theoretical angle (7r/4 - /2) of 26.5° for sand. Due to development of additional shear
line, a wedge like soil block was formed adjacent to the tool face, which moved upward
very slowly. The surcharge height increased exponentially with tool displacement at
decreasing rate and became constant after a distance of about 40 to 50 cm, which
represented the stage of dynamic stability. Simulated failure area was statistically close to
experimental failure area. |
| Year | 2005 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AE-05-01 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Salokhe, Vilas M.; |
| Examination Committee(s) | Jayasuriya, H.P.W.;Barry, William ; |
| Scholarship Donor(s) | AIT Partial Fellowship
Protected Cultivation Project; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2005 |