Optimized Design and Analysis of the Small End of a Connecting Rod for Internal Combustion Engines

Abstract

The connecting rod is a critical component in internal combustion engines, transmitting forces between the piston and the crankshaft. Among its key features, the small end, which connects to the piston pin, plays a vital role in ensuring efficient transmission of force and bearing life. This paper presents a detailed design and optimization study of the small end of a connecting rod, focusing on stress distribution, weight reduction, and fatigue life. Finite Element Analysis (FEA) was employed to simulate operating conditions and evaluate the effects of various geometrical configurations and materials. Design iterations aimed at minimizing the von Mises stress concentration and reducing the overall mass without compromising structural integrity. The optimized small-end design demonstrated significant improvements in durability and performance, making it suitable for high-speed engine applications. The study contributes to the development of more efficient engine components through precise engineering design.

Cite as:

Avdhut Gujar, & A Awasare. (2025). Optimized Design and Analysis of the Small End of a Connecting Rod for Internal Combustion Engines. Research and Development in Machine Design, 8(3), 11–17. 

https://doi.org/10.5281/zenodo.17483661