Análise de falha por fadiga de parafuso sob carga transversal aplicado na articulação de um módulo de esteira com elevação

Abstract

Pallet conveyors with lifting mechanism are equipment that related to their design functions must be premised on serving applications that require long working hours. The components of this type of equipment are subjected to variable loading, resulting from the movement of the product and its operating characteristics, projects like these must be safe from failures resulting from the fatigue process. To avoid ruptures from the main agent that causes failures in elements under cyclic loading, the present report has as proposal to study the fatigue failure analysis of a screw applied to the articulation of a lifting mechanism that makes up a conveyor module. Linking the collapse to the lack of adequate prestressing, the study is approached and segmented with an initial analysis of the joint with preload and later without. To determine the maximum stresses in the fastener, a linear MEF simulation is performed using the SolidWorks Simulation software. Subsequently, from the execution of tensile tests, the Neuber method is used to convert linear to non-linear stresses. With the analytical validation of the stresses found in the numerical analysis, it can be seen from the implementation of methods based on deformation, that the fatigue life estimates were close to the estimated mean time of failure. [resumo fornecido pelo autor]