| Author | Singh, Alok Kumar |
| Call Number | AIT Thesis no. AE-90-06 |
| Subject(s) | Tillage
|
| Note | A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The horizontal a nd vertical components of soil reaction for
flat tines of different widths ( 5 , 10 , 15 a nd 20 cm) a nd rake
angles (45 , 60, 75 a nd 90 deg . ) operating a t 10 cm a nd 15 cm
depths were recorded in dry sand under quasi -static condition. A
vertical tine of 5 cm width at 20 cm depth was a l so studied . Soil
reactions were observed to be cyclic in nature with distinct peak
and trough values for all the tines under study except for
vertical tines of 5 cm width at 15 cm a nd 20 cm depths . There
was no significant variation in the peak to trough draft ratio
with tine width and rake angle.
The rupture profile on the soil surface could be constructed
by straight lines emanating from the tine edges a nd a curved
boundary . Maximum rupture distance increased with increase in
tine width . Soil failure was three dimensional for all t he tines
studied. Narrow tines had more prominent effect on soil
disturbance due to large contribution by s ide crescents.
Stabilised surcharge was trapezoidal in shape with maximum height
at the center of the tine and varied symmetrically across t he
tine width. The maxi mum he ight increased with increase in tine
width a nd depth but it was independent of rake angle . A linear
relationship was found between stabilised surcharge height and
tine width at both 10 cm a nd 15 cm depths. A mathematical mode l
was also developed to predict the surcharge build- up . |
| Year | 1990 |
| 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) | Singh, Gajendra ;Gee-Clough, D.
|
| Examination Committee(s) | Gupta, Chandra P. ;Salokhe, Vilas M |
| Scholarship Donor(s) | Government of Great Britain |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1990 |