Korean Journal of Agricultural Science ISSN:2466-2402(Print) 2466-2410(Online) 농업과학연구

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