Análise e simulação de mecanismos flexíveis

Abstract

The study aims to perform the kinematic analysis of compliant mechanisms by analytical methods and thus compare with results obtained from the simulation employing the finite element method. Due to the presence of large deflection in compliant mechanisms, the geometric nonlinearity becomes present, so that direct application of conventional kinematic analysis method becomes inappropriate. Therefore, the analysis of the compliant mechanisms is performed utilizing the concept of pseudo-rigid body model (PRBM). The concept redesigns the compliant mechanism as a mechanism composed by rigid links and torsion springs. As in the traditional method, the rigid links are also employed, however, torsion springs are added to the joints to obtain an approximation of the force-deflection relationship of the flexible segments. A finite element software of nonlinear analysis is then used to simulate both the pseudo-rigid mechanism and the compliant mechanism. The results obtained from the numerical simulation are then compared and discussed.