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Titel: Virgin Passive Colon Biomechanics and a Literature Review of Active Contraction Constitutive Models
VerfasserIn: Bhattarai, Aroj
Horbach, Andreas Johannes
Staat, Manfred
Kowalczyk, Wojciech
Tran, Thanh Ngoc
Sprache: Englisch
Titel: Biomechanics
Bandnummer: 2
Heft: 2
Seiten: 138-157
Verlag/Plattform: MDPI
Erscheinungsjahr: 2022
Freie Schlagwörter: virgin passive
strain energy function
smooth muscle contraction
viscoelasticity
damage
DDC-Sachgruppe: 610 Medizin, Gesundheit
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: The objective of this paper is to present our findings on the biomechanical aspects of the virgin passive anisotropic hyperelasticity of the porcine colon based on equibiaxial tensile experiments. Firstly, the characterization of the intestine tissues is discussed for a nearly incompressible hyperelastic fiber-reinforced Holzapfel–Gasser–Ogden constitutive model in virgin passive loading conditions. The stability of the evaluated material parameters is checked for the polyconvexity of the adopted strain energy function using positive eigenvalue constraints of the Hessian matrix with MATLAB. The constitutive material description of the intestine with two collagen fibers in the submucosal and muscular layer each has been implemented in the FORTRAN platform of the commercial finite element software LS-DYNA, and two equibiaxial tensile simulations are presented to validate the results with the optical strain images obtained from the experiments. Furthermore, this paper also reviews the existing models of the active smooth muscle cells, but these models have not been computationally studied here. The review part shows that the constitutive models originally developed for the active contraction of skeletal muscle based on Hill’s three-element model, Murphy’s four-state cross-bridge chemical kinetic model and Huxley’s sliding-filament hypothesis, which are mainly used for arteries, are appropriate for numerical contraction numerical analysis of the large intestine.
DOI der Erstveröffentlichung: 10.3390/biomechanics2020013
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-365605
hdl:20.500.11880/33211
http://dx.doi.org/10.22028/D291-36560
ISSN: 2673-7078
Datum des Eintrags: 24-Jun-2022
Fakultät: M - Medizinische Fakultät
Fachrichtung: M - Orthopädie
Professur: M - Keiner Professur zugeordnet
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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