Parameter Identification of Nonlinear Viscoelastic Material Model Using Finite Element-Based Inverse Analysis

2016 ◽  
pp. 141-150
Author(s):  
Salah U. Hamim ◽  
Raman P. Singh
Keyword(s):  
Finite Element ◽  
Parameter Identification ◽  
Viscoelastic Material ◽  
Inverse Analysis ◽  
Material Model ◽  
Nonlinear Viscoelastic Material ◽  
Nonlinear Viscoelastic

Nonlinear Viscoelastic Material Property Estimation of Lower Extremity Residual Limb Tissues

2004 ◽  
Vol 126 (2) ◽  
pp. 289-300 ◽  
Author(s):  
Ergin To¨nu¨k ◽  
M. Barbara Silver-Thorn
Keyword(s):  
Finite Element ◽  
Viscoelastic Material ◽  
Soft Tissues ◽  
Residual Limb ◽  
Element Analysis ◽  
Nonlinear Viscoelastic Material ◽  
Nonlinear Viscoelastic ◽  
Force Relaxation ◽  
Material Formulation

Axisymmetric nonlinear finite-element analysis was used to simulate force-relaxation and creep data obtained during in vivo indentation of the residual limb soft tissues of six individuals with trans-tibial amputation [1]. The finite-element models facilitated estimation of an appropriate set of nonlinear viscoelastic material coefficients of extended James-Green-Simpson material formulation for bulk soft tissue at discrete, clinically relevant test locations. The results indicate that over 90% of the experimental data can be simulated using the two-term viscoelastic Prony series extension of James-Green-Simpson material formulation. This phenomenological material formulation could not, however, predict the creep response from relaxation experiments, nor the relaxation response from creep experiments [2–5]. The estimated material coefficients varied with test location and subject indicating that these coefficients cannot be readily extrapolated to other sites or individuals.

An approach to characterize nonlinear viscoelastic material behavior using dynamic mechanical tests and analyses

1997 ◽  
Author(s):  
Hunter Golden ◽  
Thomas Strganac ◽  
Richard Schapery ◽  
Hunter Golden ◽  
Thomas Strganac ◽  
...  
Keyword(s):  
Viscoelastic Material ◽  
Mechanical Tests ◽  
Material Behavior ◽  
Dynamic Mechanical ◽  
Nonlinear Viscoelastic Material ◽  
Nonlinear Viscoelastic
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