title: Modelling and simulation of the mechanical response of a Dacron graft in the pressurization test and an end-to-end anastomosis.
abstract: This work presents the modeling and simulation of the mechanical response of a Dacron graft in the pressurization test and its clinical application in the analysis of an end-to-end anastomosis. Both problems are studied via an anisotropic constitutive model that was calibrated by means of previously reported uniaxial tensile tests. First, the simulation of the pressurization test allows the validation of the experimental material characterization that included tests carried out for different levels of axial stretching. Then, the analysis of an end-to-end anastomosis under an idealized geometry is proposed. This case consists in evaluating the mechanical performance of the graft together with the stresses and deformations in the neighborhood of the Dacron with the artery. This research contributes important data to understand the functioning of the graft and the possibility of extending the analysis to complex numerical cases like its insertion in the aortic arch.
authors.affiliation: Departamento de Ingeniería Mecánica, Universidad de Santiago de Chile, USACH, Av. Bernardo O׳Higgins 3363, Santiago de Chile, Chile.
authors.forename: Claudio A
authors.initials: CA
authors.lastname: Bustos
authors.affiliation: Departamento de Ingeniería Mecánica, Universidad de Santiago de Chile, USACH, Av. Bernardo O׳Higgins 3363, Santiago de Chile, Chile. Electronic address: claudio.garcia@usach.cl.
authors.forename: Claudio M
authors.initials: CM
authors.lastname: García-Herrera
authors.affiliation: Departamento de Ingeniería Mecánica y Metalúrgica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Santiago de Chile, Chile.
authors.forename: Diego J
authors.initials: DJ
authors.lastname: Celentano
mesh_terms: D000714:Anastomosis, Surgical; D016880:Anisotropy; D001013:Aorta, Thoracic; D001696:Biomechanical Phenomena; D001807:Blood Vessel Prosthesis; D003198:Computer Simulation; D006801:Humans; D011093:Polyethylene Terephthalates / Q000737:chemistry*; D013314:Stress, Mechanical
chemical_list: D011093:Polyethylene Terephthalates
keywords: Dacron; Finite elements; Mechanical characterization; Modelling