Tire tread pattern design trigger on the stress distribution over rigid surfaces and soil compaction

Barbosa, Luis Alfredo Pires; Magalhães, Paulo Sérgio Graziano

doi:10.1016/j.jterra.2014.12.006

Cited by 21 publications

(13 citation statements)

References 23 publications

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“…In tillage works draft can be increased by up to 15% depending on the value of ballast weights and the place where they are mounted (Muhsin, 2010;Serrano et al, 2009Serrano et al, , 2007. But this method has a very important drawback -a danger always remains of excessive compacting of the soil and damaging its structure at great depths (much deeper than it is tilled), which can reduce soil productivity (Grečenko and Prikner, 2014; Barbosa and Magalhaes, 2015). Too much ballast weight on the tractor means wasting fuel due to increased rolling resistance, increasing wear of drive train and pressing the soil.…”

Section: Adjustment Of Wheels Slipmentioning

confidence: 99%

“…The slip can be reduced by increasing the contact area between the driving tires and the surface (Š merda and Č upera, 2010;Molari et al, 2012;Barbosa and Magalhaes, 2015;Elwaleed et al, 2006).…”

Section: Performance Indicators Of a Tractor Working In Singlewheel 4mentioning

confidence: 99%

“…Low fuel consumption (3.5-3.9 L ha À1 ) and medium slip (8-12%) in a dual-wheel 2WD mode with light ballast weights and low tire pressures can be explained as follows: dual wheels and low tire pressures create a large contact area of the driving (rear) wheels Barbosa and Magalhaes, 2015; light ballast weight at the front significantly reduces the vertical load on the front (non-driving) wheels, resulting in lower rolling resistance (Janulevičius and Giedra, 2008;Taghavifar and Mardani, 2013); 2WD drive allows to avoid power losses due to front axle drive and kinematic mismatch caused by disproportional deformations of the front and the rear tires (Janulevičius et al, 2014). Considering the obtained results it is appropriate to extend the research to establish clearer boundaries where kinematic mismatch has a greater impact on the operating parameters of the tractor.…”

Section: Performance Indicators Of a Tractor Working In Singlewheel 4mentioning

confidence: 99%

“…Deviations from the operational speed deteriorate quality of work and increase power consumption. Example, when recommended speed (8-10 km/h) is exceeded for soil tillage, the dynamic effect on the soil increases, which adds to power consumption (Barbosa and Magalhaes, 2015;Vantsevich, 2014;Moitzi et al, 2013;Hashemi et al, 2012). In order to effectively use the engine power and not to deviate from the operational speed, the engine has to be loaded with higher traction force, i.e., working width has to be increased.…”

Section: Introductionmentioning

confidence: 99%

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Differences in tractor performance parameters between single-wheel 4WD and dual-wheel 2WD driving systems

Damanauskas

Janulevičius

2015

Journal of Terramechanics

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Section: Adjustment Of Wheels Slipmentioning

confidence: 99%

Section: Performance Indicators Of a Tractor Working In Singlewheel 4mentioning

confidence: 99%

Section: Performance Indicators Of a Tractor Working In Singlewheel 4mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Differences in tractor performance parameters between single-wheel 4WD and dual-wheel 2WD driving systems

Damanauskas

Janulevičius

2015

Journal of Terramechanics

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“…Most scientific information sources show that about 20-55 % of the available tractor power is wasted at the tire-soil interface, i.e. because of the drive wheel slippage and tire and soil deformation [2][3][4]. This energy consumes the tires and compacts the soil to a degree that may be detrimental to crop production.…”

mentioning

confidence: 99%

Mathematical description of tractor slippage with variable tire inflation pressure

Janulevičius

Pupinis

Juostas

2018

Engineering for Rural Development

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Abstract. Tractor slippage is one of the main economic and environmental indicators for composing of tractor units. It is a key indicator showing the rational interaction of the tire to the road (soil) surface. If it is too big or too small, big energy losses occur. Slippage depends not only on the vertical loads to the driving wheels, but also on the wheel and soil grip area. The grip area between the wheel and soil usually increases by reducing the tire's air pressure. For the operation of tractor units (especially in agriculture) the preliminary calculation of the slippage, i.e. forecasting of the energy and economic task, is one of the most important. Tractor slippage prediction in most cases is calculated based on the traction coefficients. However, the coefficients mathematical expression does not include indicators that evaluate tire pressure in the tire. From the mathematical point of view, for the ability to optimize the slippage of the driving wheels, while at the same time seeking better ecological and economic performance, it is not enough to evaluate the traction coefficient dependencies on the traction forces and the vertical load of tires, but also dependencies on the tire performance indicators, too. This article will present a mathematical model that allows estimating the slippage of driving wheels at various air pressure in the tractor tires. Based on the experimental tractor slippage dependences on the traction power and air pressure in the tires and the calculations based on the empirical formula, the formulas for calculation of the limiting traction power and the degree of the coefficient of the mathematical model of the towing calculation were made. An expanded calculation method allows to calculate the slippage value of the tractor driven wheel for any permitted tire inflation pressure.Keywords: farm tractor, draw pull, inflation pressure, slippage, traction coefficient. IntroductionThe main purpose of farm tractors is to perform drawbar work. This is defined by draw pull force and run speed. Draw pull and drive wheel slippage are the key indicators affected by interaction between the wheel and the soil surface [1]. Most scientific information sources show that about 20-55 % of the available tractor power is wasted at the tire-soil interface, i.e. because of the drive wheel slippage and tire and soil deformation [2][3][4]. This energy consumes the tires and compacts the soil to a degree that may be detrimental to crop production. Efficient work of agricultural tractors includes: choosing an optimum work speed for a given tractor-implement unit; maximizing the tractive advantage of the traction devices, and minimizing the drive wheel slippage [5; 6]. Among these, minimizing of the fuel consumption could be done with little efforts.The agricultural tractors work at maximum efficiency, if their slippage is maintained in a certain rational range [7; 8]. As per the previous studies, it is recommended that farm tractors and drive wheels should be maintained to rational slippage at 10-15 % to get...

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Tire Life Assessment for Increasing Re‐Manufacturing of Commercial Vehicle Tires

Karkaria,

Chen,

Siuta

et al. 2024

Technology Innovation for the Circular Economy

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Tire tread pattern design trigger on the stress distribution over rigid surfaces and soil compaction

Cited by 21 publications

References 23 publications

Differences in tractor performance parameters between single-wheel 4WD and dual-wheel 2WD driving systems

Differences in tractor performance parameters between single-wheel 4WD and dual-wheel 2WD driving systems

Mathematical description of tractor slippage with variable tire inflation pressure

Tire Life Assessment for Increasing Re‐Manufacturing of Commercial Vehicle Tires

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