The Journal of Engine Research

The Journal of Engine Research

Static analysis, fatigue and buckling of connecting rod by finite element method

Document Type : Original Article

Authors
Department of Mechanical Engineering, National University of Skills (NUS), Tehran, Iran
Abstract
The connecting rod is one of the most important components of an assembled engine, transferring energy from the piston to the crankshaft and converting the linear and reciprocating motion of the piston into the rotational motion of the crankshaft. The connecting rod operates under very complex conditions and is subjected to stress not only due to its mechanism but also because of inertial forces. Its behavior is influenced by fatigue phenomena resulting from cyclic reversible loads. In this study, the static analysis, fatigue, and buckling of the connecting rod were performed using the finite element method and the ANSYS software. Initially, the dimensions of the connecting rod were measured with an accuracy of 0.1 millimeters and then modeled in SolidWorks before being transferred to ANSYS for analysis. Considering the average effective pressure of the cylinder for the U650 tractor (0.8 megapascals) and the mechanical efficiency of the engine (0.7), the maximum force was calculated to be 9500 newtons. The results indicated that the maximum tensile and compressive stress is 25.25 Mpa, occurring near the small end of the connecting rod, and the overall elongation due to tensile stress was calculated to be 0.018 millimeters. Additionally, the allowable number of cycles was determined to be 10^8, and the minimum safety factor was established at 3.7.
Keywords

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  • Receive Date 10 November 2024
  • Revise Date 05 December 2024
  • Accept Date 20 December 2024