| KEYWORD |
CONNECTING ROD BUCKLING ANALYSIS USING EIGENVALUE and EXPLICIT METHODS
Riferimenti CRISTIANA DELPRETE
Gruppi di ricerca 20-Industrial Systems Engineering and Design
Tipo tesi ANALITICA E NUMERICA, MODELLISTICA E SIMULAZIONE
Descrizione Yield, fatigue and buckling characteristics are often used as evaluation indexes for the performance of engine connecting rods in weight reduction design. There are, however, a limited number of studies on the buckling of connecting rods. Even the widely used field equations for the buckling have limitations in the application since they are derived from ideal support conditions. It was recently shown that the sensitivity of buckling limits to the connecting rod weight reduction is relatively higher than those of yield and fatigue. Hence, when weight reduction of connection rod shank is attempted, buckling should be considered as an essential factor along with the other criteria such as yield and fatigue. For these reasons identifying a predictive, accurate and computationally efficient method to predict buckling strength is paramount in a successful connecting rod design. There are two primary Finite Element Analysis (FEA) methods to evaluate the buckling strength of a component with a complex geometry. One is the eigenvalue method and the other is the explicit dynamic method.
The aim of the thesis is to compare both methods on a test case, to evaluate their pros and cons and compare their predictions to the Euler and Rankine’s analytical formulations. The fully functioning methodologies may then be applied to perform an optimization study on a nominal connecting rod geometry or to evaluate the influence of friction at the connecting rod boundaries on the buckling strength results.
Scadenza validita proposta 13/01/2021
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