Eventos Anais de eventos
ENEBI 2018
6º Encontro Nacional de Engenharia Biomecânica
A VARIATIONAL CONSTITUTIVE MODEL FOR SOFT BIOLOGICAL TISSUES CONSIDERING INDIVIDUAL PARAMETERS
Submission Author:
Ana Bárbara Krummenauer Formenton , RS
Co-Authors:
Ana Bárbara Krummenauer Formenton, Jakson Vassoler
Presenter: Ana Bárbara Krummenauer Formenton
doi://10.26678/ABCM.ENEBI2018.EEB18-0121
Abstract
Soft biological tissues are mainly composed by collagen, elastin and ground substance. Due to the soft biological tissues constitutions, its mechanical behavior is nonlinear, viscoelastic and anisotropic. Moreover, tissue’s mechanical behavior may be different for distinct individual, which represent a strong restriction to apply numerical simulations on real situations. Aiming to correlate the mechanical behavior of the biological tissue with individual parameters, the scope of the present work is to develop a material model capable to incorporate specific individual variables dependencies, such as physical, physiological and histological parameters. The constitutive model is based on a variational framework, in which a local minimization provides the internal variables updates for each load increment. The variational framework allows constructing suitable nonlinear potentials, with the expected individual dependence, in order to obtain the mechanical behavior observed experimentally. Numerical tests evidence the capability of the model to represent the tissue’s mechanical behavior considering an individual parameter.
Keywords
Variational Constitutive Model, Biological Tissues, Individual Parameters
