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An integral piece of all vertical lift bridges is the wire rope sheave assembly, which consists of a trunnion and sheave connected with an interference fit and set in roller bearings. An interference fit is a classic and reliable assembly method to connect a cylindrical shaft and hub by introducing a geometrical interference between their mating diameters. Many studies have been conducted on the stress concentrations found in the hub at the beginning of the connection, but the stress concentrations found in the shaft have not been thoroughly investigated. To improve the design of the trunnion-sheave assembly on vertical lift bridges, a study was performed on the stress concentrations found in the assembly using FEA software. This study focuses on the effect of the trunnion's mating diameter being overhung or inset with the hub, and design guidelines are provided.
Interference Fit, Sheave, Trunnion, Vertical Lift Bridge, FEA, Stress Concentration
Computer-Aided Engineering and Design | Engineering | Mechanical Engineering
James Worth Bagley College of Engineering
Department of Mechanical Engineering
Hastings, Jeffrey W., "Stress Concentrations in Sheave-trunnion Interference Fit Subjected to Bending" (2022). ME 4233/6233 Fundamentals of FEA. 15.