Parametric study of stresses affecting the external and internal fibers of connecting rod small end | ||
| Journal of Engineering Science and Military Technologies | ||
| Article 1, Volume 5, Issue 2, September 2021, Pages 51-62 PDF (1.73 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejmtc.2022.104230.1202 | ||
| Author | ||
| Mohamed Amin* | ||
| Abstract | ||
| Connecting rod is an important element in reciprocating engines which faces various stress conditions. For long time, extensive efforts are conducted to reduce its weight and consequently affecting inertia force and cost. The purpose of this work is to study the factors which control the stresses affecting external and internal surfaces of connecting rod small end.These stresses result from inertia force of piston group mass and part of connecting rod. The transient section between small end and shank is considered as the most critical sectionat angle φz. The value of internal stress is found to be zero at certain value of this angle.In this study, a comprehensive investigation has been conducted to study the effect of changing small end design parameters on the value of angle (φzο) at which internal stress equals zero. The results showed that there is no effect of inertia force and small end width, while small end thickness, mean radius, and load distribution factor have dominant effect on this angle value. By using regression, a new correlation between (φzο) and dominant design parameters has been introduced with maximum error 0.7%. Verification of analytical study has been conducted using ANSYS numerical analysis software.Such a relation could be a useful tool for engine designers to predict the value of (φzο) to be a guide to change small end dimensions and its material which participate in reduction of connecting rod weight and price. | ||
| Keywords | ||
| Connecting rod; internal combustion engines; parametric study; small end | ||
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