Nonlinear resonances of an idealized saccular aneurysm

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Show simple item record Aranda Iglesias, Francisco Damián Ramón Lozano, Clara Rodríguez-Martínez, José A. 2020-01-09T10:06:44Z 2020-01-09T10:06:44Z 2017-12-01
dc.identifier.bibliographicCitation International Journal of Engineering Science, vol. 121, pp. 154-166.
dc.identifier.issn 0020-7225
dc.description.abstract This paper investigates the occurrence of dynamic instabilities in idealized intracranial saccular aneurysms subjected to pulsatile blood flow and surrounded by cerebral spinal fluid. The problem has been approached extending the original 2D model of Shah and Humphrey (1999) to a 3D framework. The justification for using a 3D formulation arises from the works of Suzuki and Ohara (1978), MacDonald et al. (2000) and Costalat et al. (2011) who showed experimental evidences of intracranial aneurysms with a ratio between wall thickness and inner radius larger that 0.1. Two different material models have been used to describe the mechanical behaviour of the aneurysmal wall: Neo-Hookean and Mooney-Rivlin. To the authors' knowledge, for the first time in literature, the dynamic response of the aneurysm has been analysed using complete nonlinear resonance diagrams that have been obtained from a numerical procedure specifically designed for that purpose. Our numerical results show that, for a wide range of wall thicknesses and both constitutive models considered, the saccular aneurysms are dynamically stable within the range of frequencies associated to the normal heart rates, which confirms previous results of Shah and Humphrey (1999). On the other hand, our results also show that the geometric and material nonlinearities of the problem could bring closer than expected the resonance frequencies of the aneurysm to the frequencies of the pulsatile blood flow.
dc.description.sponsorship The authors are indebted to the Spanish Ministry of Economy and Competitiveness (Project EUIN2015-62556) for the financial support received which allowed conducting part of this work.
dc.format.extent 12
dc.language.iso eng
dc.publisher Elsevier
dc.rights © 2017 Elsevier Ltd. All rights reserved.
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.subject.other Intracranial aneurysm
dc.subject.other Finite elasticity
dc.subject.other Constitutive model
dc.subject.other Nonlinear resonances
dc.title Nonlinear resonances of an idealized saccular aneurysm
dc.type article
dc.subject.eciencia Ingeniería Mecánica
dc.subject.eciencia Medicina
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. EUIN2015-62556
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 154
dc.identifier.publicationlastpage 166
dc.identifier.publicationtitle International Journal of Engineering Science
dc.identifier.publicationvolume 121
dc.identifier.uxxi AR/0000020655
dc.contributor.funder Ministerio de Economía y Competitividad (España)
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