dc.contributor.author |
Abo Al-Kheer, A. |
- |
dc.contributor.author |
Kharmanda, M. G. |
- |
dc.contributor.author |
El-Hami, A. |
- |
dc.contributor.author |
Mouazen, Abdul Mounem |
- |
dc.date.accessioned |
2011-10-17T23:08:51Z |
|
dc.date.available |
2011-10-17T23:08:51Z |
|
dc.date.issued |
2011-08-01T00:00:00Z |
- |
dc.identifier.citation |
A. Abo Al-Kheer, M.G. Kharmanda, A. El Hami, A.M. Mouazen, Estimating the variability of tillage forces on a chisel plough shank by
modeling the variability of tillage system parameters, Computers and Electronics in Agriculture, Volume 78, Issue 1, August 2011, Pages 61-70. |
|
dc.identifier.issn |
0168-1699 |
- |
dc.identifier.uri |
http://dx.doi.org/10.1016/j.compag.2011.06.001 |
- |
dc.identifier.uri |
http://dspace.lib.cranfield.ac.uk/handle/1826/6488 |
|
dc.description.abstract |
In this paper, a probabilistic approach is proposed for quantifying the
variability of the tillage forces for the shank of a chisel plough with narrow
tines and to estimate the failure probability. An existing three-dimensional
analytical model of tool forces from McKyes was used to model the interaction
between the tillage tools and the soil. The variability of tillage forces was
modeled, taking into account the variability of soil engineering properties,
tool design parameters and operational conditions. The variability of the soil
engineering properties was modeled by means of experimental observations. The
dispersion effect of each tillage system parameter on the tillage forces was
determined by a sensitivity analysis. The results show that the variability of
the horizontal and vertical forces follows a lognormal distribution (μ=0.872,
ξ=0.449; μ=0.004, ξ=0.447) and the relationship between these forces is positive
and quasi-linear (ρ(PH,Pv)=0.93).This lognormal variability was integrated into
the estimation of the failure probability for the shank by using Monte Carlo
simulation (MCS) and the first-order reliability method (FORM). The results
obtained by these two methods, with the assumption of non-correlation between
the horizontal and vertical forces, were almost identical. However, the FORM
method was faster and simpler, compared to the MCS technique. Furthermore, the
correlation between the horizontal and vertical forces has no significant effect
on the failure probability, regardless of the correlation strength. Therefore,
it is concluded that the FORM method can be used to estimate the failure
probability without considering the correlation between horizontal and vertical
fo |
en_UK |
dc.language.iso |
en_UK |
- |
dc.publisher |
Elsevier Science B.V., Amsterdam. |
en_UK |
dc.rights |
NOTICE: this is the author’s version of a work that was accepted for publication in Computers and Electronics in Agriculture. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Computers and Electronics in Agriculture, VOL 78, ISSUE 1, (2011) DOI: 10.1016/j.compag.2011.06.001 |
|
dc.title |
Estimating the variability of tillage forces on a chisel plough shank by
modeling the variability of tillage system parameters |
en_UK |
dc.type |
Article |
- |