Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Stress and fatigue analysis of major components under dynamic loads for a four-row tractor-mounted radish collector

  • Khine Myat, Swe (Department of Agricultural Machinery Engineering, Chungnam National University) ;
  • Md Nasim, Reza (Department of Agricultural Machinery Engineering, Chungnam National University) ;
  • Milon, Chowdhury (Department of Agricultural Machinery Engineering, Chungnam National University) ;
  • Mohammod, Ali (Department of Agricultural Machinery Engineering, Chungnam National University) ;
  • Sumaiya, Islam (Department of Smart Agricultural Systems, Chungnam National University) ;
  • Sang-Hee, Lee (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Sun-Ok, Chung (Department of Agricultural Machinery Engineering, Chungnam National University) ;
  • Soon Jung, Hong (Korea National College of Agriculture and Fisheries)
  • Received : 2022.02.28
  • Accepted : 2022.04.26
  • Published : 2022.06.01
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Abstract

The development of radish collectors has the potential to increase radish yields while decreasing the time and dependence on human labor in a variety of field activities. Stress and fatigue analyses are essential to ensure the optimal design and machine life of any agricultural machinery. The objectives of this research were to analyze the stress and fatigue of major components of a tractor-mounted radish collector under dynamic load conditions in an effort to increase the design dependability and dimensions of the materials. An experiment was conducted to measure the shaft torque of stem-cutting and transferring conveyor motors using rotary torque sensors at different tractor ground speeds with and without a load. The Smith-Watson-Topper mean stress equation and the rain-flow counting technique were utilized to determine the required shear stress with the distribution of the fatigue life cycle. The severity of the operation was assessed using Miner's theory. All running conditions produced more than 107 of high cycle fatigue strength. Furthermore, the highest severity levels for motor shafts used for stem cutting and transferring and for transportation joints and cutting blades were 2.20, 4.24, 2.07, and 1.07, and 1.97, 3.81, 1.73, and 1.07, respectively, with and without a load condition, except for 5.24 for a winch motor shaft under a load. The stress and fatigue analysis presented in this study can aid in the selection of the most appropriate design parameters and material sizes for the successful construction of a tractor-mounted radish collector, which is currently under development.

Keywords

Acknowledgement

This work was supported by the Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, and Forestry (IPET) through the Agriculture, Food and Rural Affairs Convergence Technologies Program for Educating Creative Global Leaders, funded by the Ministry of Agriculture, Food and Rural Affairs (MAFRA) (Project No. 320001-4), Republic of Korea.

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