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Nonlinear viscoelastic material property estimation of lower extremity residual limb tissues
Date
2004-04-01
Author
Tönük, Ergin
Metadata
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Axisymmetric nonlinear finite-element analysis was used to simulate force-relaxation and creep data obtained during in vivo indentation of the residual limb sofa 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 call 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.
Subject Keywords
Physiology (medical)
,
Biomedical Engineering
URI
https://hdl.handle.net/11511/48176
Journal
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
DOI
https://doi.org/10.1115/1.1695575
Collections
Department of Mechanical Engineering, Article
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E. Tönük, “Nonlinear viscoelastic material property estimation of lower extremity residual limb tissues,”
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
, pp. 289–300, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48176.