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Study on the effect of loading on the stress distribution in components chosen for the car scissor lift

Woźniak Marek, Morawski Jakub, Zakrzewski Sergiusz, Kądziela Arkadiusz, Siczek Krzysztof

Zeszyty Naukowe Politechniki Morskiej w Szczecinie

2025

nr 84 (156)

94--105

This study aims to determine the effect of loading on stress distribution in components of the scissor lift during the pushing up or down of the car being analyzed. The FEM models of the lead screw and the lift arms are elaborated and implemented using both Autodesk Inventor and the Solid Edge software. The mathematical model for the lead screw is also developed. The models allowed for the obtaining of the von Mises stress values in the lead screw and in the lift arms. Such stress values in the middle of the FEM screw model coincided with those determined analytically. The obtained values are very sensitive to the level of refinement applied for the size of finite elements. The values of the von Mises stresses in both lower and upper arms varied depending on the lift. For a small value of the lift, they can be up to 35% higher than those in the lead screw. However, for the higher lift, the von Mises stress values in the arms may be equal to or smaller than those in the lead screw.