Design and Fatigue Analysis of The Lower Arm Element of The Three-Point Hitch in Tractors

Öz

Using materials with appropriate forms and properties in agricultural production is essential for preparing the soil bed and surface. The tools and equipment required for these operations are generally attached to the three-point suspension apparatus at the rear of the tractors. For this reason, the stresses to which the suspension apparatus is exposed and the fatigue behavior of the materials used are significant in design and manufacturing. This study aims to examine the static stress and fatigue analysis caused by the forces acting on the lower lifting arm of the three-point hitch of the tractors at different positions in terms of 55Cr3 and 42CrMo4 steels. Solidworks software created the lower lift arm model, and Ansys Workbench software analyzed stress and fatigue. Accordingly, the highest force was determined when the lower arm element was in the upper position. Minimum deformation occurred in 55Cr3 steel. However, the maximum fatigue life was at the same values for both materials. The safety factor of 55Cr3 steel was within acceptable limits. For this reason, according to its behavior during the total deformation and providing the safety factor, 55Cr3 steel can be preferred instead of 42CrMo4 steel in producing the lower lift arm.

Anahtar Kelimeler

• Fatigue analysis
• stress analysis
• three-point hitch
• tractor

Kaynakça

1. [1]. Singh, N, Pandey, KP. 2019. Design, development and laboratory testing of a front mounted three point linkages for higher power tractors. Int J Sci Environ Technol; 6: 2087-2099.
2. [2]. Salokhe, VM, Chuenpakaranant, W, Niyampa, T. 1999. Effect of enamel coating on the performance of a tractor drawn rotavator. J Terramech; 36: 127-138.
3. [3]. Bauer, F, Portes, P, Slimarík, D, Cupera, J, Fajman, M. 2017. Observation of load transfer from fully mounted plough to tractor wheels by analysis of three point hitch forces during ploughing. Soil Tillage Res; 172: 69-78.
4. [4]. Cerovic, V, Milkovic, D, Aleksandar, G, Petrovic, D, Simonovic, V. 2020. 2D analytical model for evaluation of the forces in the three point hitch mechanism. J Agric Sci (Belihuloya); 26: 271-281.
5. [5]. Mattetti, M, Molari, G, Sereni, E. 2017. Damage evaluation of driving events for agricultural tractors. Comput Electron Agric; 135: 328-337.
6. [6]. Kheiralla, AF, Yahya, A, Zohadie, M, Ishak, W. 2003. Design and development of a three-point auto hitch dynamometer for an agricultural tractor. ASEAN Journal on Science and Technology for Development; 20: 271-288.
7. [7]. Acar, AI, Ozturk, R, Guner, M. Agricultural equipments and machinery. Anadolu University Publication: Turkey, 2017.
8. [8]. Morling, RW, Agricultural tractor hitches: Analysis of design requirements, in: Winter Meeting of the American Society of Agricultural Engineers, New Orleans, Louisiana, 1979, pp 1-28.

9. [9]. Morselli, R, Zanasi, R, Ferracin, P. Dynamic model of an electro-hydraulic three-point hitch, in: American Control Conference IEEE Book, 2006, pp 6-12.
10. [10]. Kececioglu, G, Gulsoylu, E. Tractor and agricultural machinery hydraulics, in: III. Hydraulic Pneumatic Congress and Exhibition Proceedings Book, 2003, pp 57-66.
11. [11]. Karanfil, F. Tractor hydraulic lifting system lifting capacity of three-point hitch calculation study design and lower arm, MSc. Thesis, Namik Kemal University Institute of Science, Turkey, 2013.
12. [12]. Karakas, H. Investigation of the effects of sanding process on fatigue life of leaf springs, MSc. Thesis, Balikesir University Institute of Science, Turkey, 2020.
13. [13]. Celik, S. The investigation of effects of different heat treatments on the mechanical properties of SAE/AISI 4140 steel, MSc. Thesis, Ondokuz Mayis University Institute of Science, Turkey, 2017.
14. [14]. Kumar, S, Tewari, VK, Bharti, CK, Ranjan, A. 2021. Modeling, simulation and experimental validation of flow rate of electro-hydraulic hitch control valve of agricultural tractor. Flow Measurement and Instrumentation 2: 102070.
15. [15]. Pannucharoenwong, N, Hemathulin, S, Lasopha, T, Rattanadecho, P, Polprasert, J, Luekhajorn, P. 2023. Mechanical stress analysis of the lower link arm tractor connect paddy field sowing machine using finite element method, GMSARN International Journal, 17, 85-95.
16. [16]. Chukewad, YM, Chadha, S, Jagdale, KS, Elkunchwar, N, Rosa, UA, Omohundro, Z. 2024. Tractor three-point hitch control for an independent lower arms system, Agri Engineering, 6, 1725–1746.
17. [17]. Motte, R, DeWaele, W. 2024. An overview of estimations for the high-cycle fatigue strength of conventionally manufactured steels based on other mechanical properties, Metals, 14, 85.