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Material properties of the heel fat pad across strain rates

The complex structural and material behaviour of the human heel fat pad determines the transmission of plantar loading to the lower limb across a wide range of loading scenarios; from locomotion to injurious incidents. The aim of this study was to quantify the hyper-viscoelastic material properties...

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Autores principales: Grigoriadis, Grigoris, Newell, Nicolas, Carpanen, Diagarajen, Christou, Alexandros, Bull, Anthony M.J., Masouros, Spyros D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5161234/
https://www.ncbi.nlm.nih.gov/pubmed/27643676
http://dx.doi.org/10.1016/j.jmbbm.2016.09.003
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author Grigoriadis, Grigoris
Newell, Nicolas
Carpanen, Diagarajen
Christou, Alexandros
Bull, Anthony M.J.
Masouros, Spyros D.
author_facet Grigoriadis, Grigoris
Newell, Nicolas
Carpanen, Diagarajen
Christou, Alexandros
Bull, Anthony M.J.
Masouros, Spyros D.
author_sort Grigoriadis, Grigoris
collection PubMed
description The complex structural and material behaviour of the human heel fat pad determines the transmission of plantar loading to the lower limb across a wide range of loading scenarios; from locomotion to injurious incidents. The aim of this study was to quantify the hyper-viscoelastic material properties of the human heel fat pad across strains and strain rates. An inverse finite element (FE) optimisation algorithm was developed and used, in conjunction with quasi-static and dynamic tests performed to five cadaveric heel specimens, to derive specimen-specific and mean hyper-viscoelastic material models able to predict accurately the response of the tissue at compressive loading of strain rates up to 150 s(−1). The mean behaviour was expressed by the quasi-linear viscoelastic (QLV) material formulation, combining the Yeoh material model ([Formula: see text] , [Formula: see text] , [Formula: see text]) and Prony׳s terms ([Formula: see text] , [Formula: see text] , [Formula: see text] for [Formula: see text] , [Formula: see text] , [Formula: see text]). These new data help to understand better the functional anatomy and pathophysiology of the foot and ankle, develop biomimetic materials for tissue reconstruction, design of shoe, insole, and foot and ankle orthoses, and improve the predictive ability of computational models of the foot and ankle used to simulate daily activities or predict injuries at high rate injurious incidents such as road traffic accidents and underbody blast.
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spelling pubmed-51612342017-01-01 Material properties of the heel fat pad across strain rates Grigoriadis, Grigoris Newell, Nicolas Carpanen, Diagarajen Christou, Alexandros Bull, Anthony M.J. Masouros, Spyros D. J Mech Behav Biomed Mater Research Paper The complex structural and material behaviour of the human heel fat pad determines the transmission of plantar loading to the lower limb across a wide range of loading scenarios; from locomotion to injurious incidents. The aim of this study was to quantify the hyper-viscoelastic material properties of the human heel fat pad across strains and strain rates. An inverse finite element (FE) optimisation algorithm was developed and used, in conjunction with quasi-static and dynamic tests performed to five cadaveric heel specimens, to derive specimen-specific and mean hyper-viscoelastic material models able to predict accurately the response of the tissue at compressive loading of strain rates up to 150 s(−1). The mean behaviour was expressed by the quasi-linear viscoelastic (QLV) material formulation, combining the Yeoh material model ([Formula: see text] , [Formula: see text] , [Formula: see text]) and Prony׳s terms ([Formula: see text] , [Formula: see text] , [Formula: see text] for [Formula: see text] , [Formula: see text] , [Formula: see text]). These new data help to understand better the functional anatomy and pathophysiology of the foot and ankle, develop biomimetic materials for tissue reconstruction, design of shoe, insole, and foot and ankle orthoses, and improve the predictive ability of computational models of the foot and ankle used to simulate daily activities or predict injuries at high rate injurious incidents such as road traffic accidents and underbody blast. Elsevier 2017-01 /pmc/articles/PMC5161234/ /pubmed/27643676 http://dx.doi.org/10.1016/j.jmbbm.2016.09.003 Text en © 2016 The Authors http://creativecommons.org/licenses/by/4.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Research Paper
Grigoriadis, Grigoris
Newell, Nicolas
Carpanen, Diagarajen
Christou, Alexandros
Bull, Anthony M.J.
Masouros, Spyros D.
Material properties of the heel fat pad across strain rates
title Material properties of the heel fat pad across strain rates
title_full Material properties of the heel fat pad across strain rates
title_fullStr Material properties of the heel fat pad across strain rates
title_full_unstemmed Material properties of the heel fat pad across strain rates
title_short Material properties of the heel fat pad across strain rates
title_sort material properties of the heel fat pad across strain rates
topic Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5161234/
https://www.ncbi.nlm.nih.gov/pubmed/27643676
http://dx.doi.org/10.1016/j.jmbbm.2016.09.003
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