Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
EXPERIMENTAL CHARACTERIZATION OF PORCINE LIGAMENTS
Submission Author:
Paulo Pedro Kenedi , RJ , Brazil
Co-Authors:
Rodrigo Ribeiro Pinho Rodarte, Stephanie Barros, Bruno Mello Silveira, Brenno Tavares Duarte, Paulo Pedro Kenedi
Presenter: Rodrigo Ribeiro Pinho Rodarte
doi://10.26678/ABCM.COBEM2021.COB2021-1114
Abstract
Porcine knee ligaments were experimentally tested employing a professional material testing machine. Both, elastic and viscoelastic characterization were accessed. Four porcine ligaments were utilized in this experimental phase: the lateral collateral ligament (LCL), the anterior cruciate ligament (ACL), the posterior cruciate ligament (PCL) and the medial collateral ligament (MCL). The load versus time results were obtained. The elastic behavior was determined by analyzing the results at relatively low load target. The viscoelasticity behavior was obtained through the realization of relaxation experimental tests, which consists in a sequence of imposed strains, followed by ligaments relaxation. To achieve a better comprehension of the soft tissue’s viscoelasticity, the concept of convolution was accessed and implemented in the Fung quasi-linear and Schapery’s nonlinear theories. The porcine knee ligaments characterization was done through a curve fitting of the experimental outputs with the utilization of mathematical equations of the quasi-linear viscoelastic theory. The application of the experimental parameters in the quasi-linear equations showed a satisfactory performance of Fung's model.
Keywords
knee ligaments, analytic model, viscoelasticity, Experimental tests
