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Prediction of Contact Pressure and Soil Penetration Resistance by Measuring Tyre Contact Area and Soil Apparent Electrical Conductivity | ||
| تحقیقات سامانهها و مکانیزاسیون کشاورزی | ||
| Article 3, Volume 20, Issue 72, July 2019, Pages 19-36 PDF (1.02 M) | ||
| Document Type: Original Article | ||
| DOI: 10.22092/erams.2017.109199.1171 | ||
| Authors | ||
| Payam Farhadi1; Abdollah Golmohammadi1; Ahmad Sharifi-Malvajerdi* 2; Gholamhossein Shahgholi1 | ||
| 1Mohaghegh Ardabili University | ||
| 2Agricultural Engineering Research Institute | ||
| Abstract | ||
| One of the most important issues in agricultural machinery section is tyre - soil interactions. In this study, a single wheel tester was used to follow experiments in controlled conditions in a soil bin. A Goodyear 12.4-28, 6 ply tractor drive tyre was operated at three vertical loads of 6, 9 and 12 kN, three inflation pressures of 80, 120 and 160 kPa and three moisture content of soil: 11.20, 14.86 and 18.68 % d.b to investigate the effect of the variables on these parameters: contact area, contact pressure, compaction, and soil apparent electrical conductivity. It was found that medium contact pressure had a direct relation with vertical load, inflation pressure and moisture content. A regression model with R-square of 0.946 was achieved to predict contact pressure. Soil electrical conductivity changes was predicted with acceptable determination coefficient of 0.850 by using of vertical load, inflation pressure and moisture content. Determination coefficient magnitude for models to predict resistance to soil penetration (cone index) using soil apparent electrical conductivity decreased when moisture content was increased. The vertical load and inflation pressure were found two factors controlling the soil apparent electrical conductivity changes in low and high moisture content, respectively. Error percentage in using soil apparent electrical conductivity parameter to estimate the penetration resistance increased with increasing moisture content. | ||
| Keywords | ||
| Soil Bin; Soil Cone Index; Tyre Inflation Pressure; Tyre Tester; Vertical Load | ||
| References | ||
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