title: Mechanical characterisation of Dacron graft: Experiments and numerical simulation.
abstract: Experimental and numerical analyses focused on the mechanical characterisation of a woven Dacron vascular graft are presented. To that end, uniaxial tensile tests under different orientations have been performed to study the anisotropic behaviour of the material. These tests have been used to adjust the parameters of a hyperelastic anisotropic constitutive model which is applied to predict through numerical simulation the mechanical response of this material in the ring tensile test. The obtained results show that the model used is capable of representing adequately the nonlinear elastic region and, in particular, it captures the progressive increase of the rigidity and the anisotropy due to the stretching of the Dacron. The importance of this research lies in the possibility of predicting the graft׳s mechanical response under generalized loading such as those that occur under physiological conditions after surgical procedures.
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: D000818:Animals; D016880:Anisotropy; D001807:Blood Vessel Prosthesis; D002417:Cattle; D003094:Collagen / Q000737:chemistry; D003198:Computer Simulation; D004548:Elasticity; D006801:Humans; D015233:Models, Statistical; D011093:Polyethylene Terephthalates / Q000737:chemistry*; D013314:Stress, Mechanical; D013718:Tensile Strength
chemical_list: D011093:Polyethylene Terephthalates; D003094:Collagen
keywords: Biomechanical model; Dacron graft; Numerical simulation