Simulation of dynamic wheel-soil interaction by Distinct Element Method (DEM) | |
| Author | Khot, Lav Ramchandra |
| Call Number | AIT Thesis no.AE-04-04 |
| Subject(s) | Soil dynamics Wheels. |
| 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-04-04 |
| Abstract | DEM (Distinct Element Method) has been applied to dynamic problem of soil rigid wheel interaction in order to simulate the deformation behavior of the soil. Mechanical model of soil using DEM was formed, based on non-continuum assumption, which solves dynamic equilibrium equation for each soil pa1ticle subjected to body and boundary forces. Simulation program using DEM technique was developed in Visual Basic 6.0 with SQL database technology. The simulation program was run for two types of soils, namely coarse sand (Soil-A) and fine sand (Soil-B) for three different vertical loading condition i.e. 4.9, 9.8 and 14.7 N. Simulation results were also validated for the same loading conditions in a laboratory soil bin experiment for soil-A and soil-B. The results indicated that the simulation program quantitatively validates the soil deformation for both the types of soils while deformation behavior at vertical load of 14.7 N for soil-B was validated quantitatively well than any other loading conditions. During simulation the rotational speed of the wheel was 1.2 rad/sec and the average diameter of soil particles was 0.5 and 0.34 cm for soil-A and soil-B. The draft force acting on rigid wheel was more in coarse sand (sand-A) than for fine sand (sand-B) for all vertical load conditions with maximum of 2.4 N for soil-A at 14.7 N of vertical load during validation. The simulated sinkage of rigid wheel was observed more than that of experimental sinkage values for both types of soils. Moreover, the sinkage was more for soil-A than soil-B at all the vertical loading conditions. Furthermore, it was observed that for initial Omm displacement, the experimental sinkage values were comparatively higher that the simulated one. |
| Year | 2004 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AE-04-04. |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Salokhe, V. M.; |
| Examination Committee(s) | Jayasuriya, H.P. W.;Barry, Williams.; |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2004. |