Estimating material parameters of a structurally based constitutive relation for skin mechanics

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dc.contributor.author Jor, Jessica en
dc.contributor.author Nash, Martyn en
dc.contributor.author Nielsen, Poul en
dc.contributor.author Hunter, Peter en
dc.contributor.editor Holzapfel, GA en
dc.contributor.editor Taber, L en
dc.date.accessioned 2011-08-16T03:55:35Z en
dc.date.accessioned 2012-03-15T22:25:06Z en
dc.date.issued 2011 en
dc.identifier.citation Biomech Model Mechanobiol 25 Nov 2010 en
dc.identifier.issn 1617-7959 en
dc.identifier.uri http://hdl.handle.net/2292/14480 en
dc.description.abstract This paper presents a structurally based modeling framework to characterize the structure–function relation in skin tissues, based upon biaxial tensile experiments performed in vitro on porcine skin. Equi-axial deformations were imposed by stretching circular skin specimens uniformly along twelve directions, and the resultant loads at the membrane attachment points were measured. Displacement fields at each deformation step were tracked using an image 2D cross-correlation technique. A modeling framework was developed to simulate the experiments, whereby measured forces were applied to finite element models that were created to represent the geometry and structure of the tissue samples. Parameters of a structurally based constitutive relation were then identified using nonlinear optimization. Results showed that the ground matrix stiffness ranged from 5 to 32 kPa, fiber orientation mean from 2 to 13◦ from the torso midline, fiber undulation mean from 1.04 to 1.34 and collagen fiber stiffness from 48 to 366 MPa. It was concluded that the objective function was highly sensitive to the mean orientation and that a priori information about fiber orientation mean was important for the reliable identification of constitutive parameters. en
dc.relation.ispartofseries Biomechanics and Modeling in Mechanobiology en
dc.relation.replaces http://hdl.handle.net/2292/7446 en
dc.relation.replaces 2292/7446 en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/1617-7959/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.subject skin en
dc.subject biomechanics en
dc.subject collagen en
dc.subject material parameter identification en
dc.subject porcine en
dc.title Estimating material parameters of a structurally based constitutive relation for skin mechanics en
dc.type Journal Article en
dc.identifier.doi 10.1007/s10237-010-0272-0 en
pubs.issue 5 en
pubs.begin-page 767 en
pubs.volume 10 en
dc.rights.holder Copyright: Springer en
dc.identifier.pmid 21107636 en
pubs.end-page 778 en
pubs.publication-status Published en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 250853 en
pubs.org-id Bioengineering Institute en
pubs.org-id ABI Associates en
pubs.org-id Engineering en
pubs.org-id Engineering Science en
pubs.org-id Science en
pubs.org-id Science Research en
pubs.org-id Maurice Wilkins Centre (2010-2014) en
dc.identifier.eissn 1617-7940 en
pubs.record-created-at-source-date 2011-12-04 en
pubs.dimensions-id 21107636 en


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