Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
DYNAMIC SIMULATION OF A PROSTHETIC FOOT CONSIDERING ROLLING AND CONTACT DEFORMATION
Submission Author:
jayme gouvêa , RJ
Co-Authors:
Caroline Silva, jayme gouvêa, Clara Carvalho de Abreu, Walter Augusto Fontoura Chagas
Presenter: Clara Carvalho de Abreu
doi://10.26678/ABCM.COBEM2019.COB2019-0844
Abstract
The present work intends to develop an analysis for an orthopedic prosthesis for a transtibial amputee, focusing on the prosthetic foot. With this, it proposes a geometry for the prosthetic foot considering the effect of the contact and the bearing that the foot does during the walk. The proposed model is composed of two masses, the individual and the prosthetic foot, and by the respective vertical displacements, at first it is considered the degree of freedom regarding the prosthetic foot rotation, in a second stage the prosthetic foot rotation and consequent relative displacement of the ankle are considered as auxiliary variables calculated from geometric parameters and materials. The effective mass, the vertical and rotational ankle rigidity, the stiffness of the sole and the displacement of the contact point during the rolling are considered as parameters of the simulation. Damping factors can also be analyzed as non-linear. The simulation is performed from the parameter survey and the integration of subdomains of the time of the gait using integration of Runge Kutta of 4th order for a multibody model. Results of these simulations are presented as angles, contact force and vertical displacements.
Keywords
Dynamic Systems, Contact, Bearing, prosthetic
