A VISCOELASTIC MODEL FOR SKIN OF STUMP IN TRANSTIBIAL PROSTHESIS

The displacement of different parts during gait cycle as force and pressure effect can contribute to developing and increasing of lesions. In present paper we investigate the viscoelastic model for prosthetic skin using a rheological model, the Maxwell slip model. We propose a Maxwell model for hyst...

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Bibliographic Details
Published in:Proceedings in Manufacturing Systems 2016-03, Vol.11 (1), p.35-35
Main Authors: Filep, Robert, Arotaritei, Dragos, Turnea, Marius, Ilea, Mihai, Rotariu, Mariana, Budacu, Cristian
Format: Article
Language:English
Subjects:
Chromosomes
Computer simulation
Displacement
Friction
Gait
Genetic algorithms
Hysteresis
Injuries
Load
Mathematical analysis
Mathematical models
Measurement techniques
Optimization
Pressure distribution
Prostheses
Prosthetics
Regression analysis
Rheology
Simulation
Skin
Stress analysis
Studies
Tribology
Viscoelasticity
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Summary:The displacement of different parts during gait cycle as force and pressure effect can contribute to developing and increasing of lesions. In present paper we investigate the viscoelastic model for prosthetic skin using a rheological model, the Maxwell slip model. We propose a Maxwell model for hysteretic behavior of skin (force vs. displacement) at the interface of stump-socket in transtibial prosthetic case. Various methods for parameter optimization in the Maxwell model are discussed and a novel method is proposed: genetic algorithm with multiple separated chromosomes in order to find the minimal number of elasto-elements with maximum performance of model. The Force and displacements are measured using Finite element model (FEM ) and simulations. The experimental results of simulation take into account two different form of hysteresis for two different locations on stump.
ISSN:2067-9238
2343-7472