Nonlinear viscoelastic material property estimation of lower extremity residual limb tissues

Date

2004-04-01

Author

Tönük, Ergin

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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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Citation Formats

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.