AN ANALYSIS OF THE CONTACT BETWEEN THE STENT AND THE ARTERY USING TUBE HIDROFORMING SIMULATION

AN ANALYSIS OF THE CONTACT BETWEEN THE STENT AND THE ARTERY USING TUBE HIDROFORMING SIMULATION

Araújo, R.; Oliveira, S. A. G.; Guimarães, T. A.

Full Article:

Stents for angioplasty have been extensively used in the treatment of the coronary diseases. After the angioplasty the expanded stent in contact with the arterial wall should avoid restenosis or re-closure of the artery. On the other hand, the contact stress between the stent and the artery may cause hyperplasia and restenosis due to the vascular injury. Therefore, the objective of this work is to study the expansion of the stent and the contact with the artery using the tube hidroforming simulation. In the simulation, it will be studied the contact stress and the final shape of the artery caused by the stent expansion process using the Stampack software, an explicit finite elements code. In this work, it was used a geometrical model of a commercial stent made of 316 L stainless steel. The stent material was modeled by using an elastic-plastic constitutive law with isotropic hardening. The artery was modeled as a cylinder and its material is hyperelastic. The results showed that the methodology has proposed in this work may be used for checking if the stent model implanted in the artery may cause restenosis after the angioplasty.

Stents for angioplasty have been extensively used in the treatment of the coronary diseases. After the angioplasty the expanded stent in contact with the arterial wall should avoid restenosis or re-closure of the artery. On the other hand, the contact stress between the stent and the artery may cause hyperplasia and restenosis due to the vascular injury. Therefore, the objective of this work is to study the expansion of the stent and the contact with the artery using the tube hidroforming simulation. In the simulation, it will be studied the contact stress and the final shape of the artery caused by the stent expansion process using the Stampack software, an explicit finite elements code. In this work, it was used a geometrical model of a commercial stent made of 316 L stainless steel. The stent material was modeled by using an elastic-plastic constitutive law with isotropic hardening. The artery was modeled as a cylinder and its material is hyperelastic. The results showed that the methodology has proposed in this work may be used for checking if the stent model implanted in the artery may cause restenosis after the angioplasty.

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DOI: 10.5151/meceng-wccm2012-16825

Referências bibliográficas

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Como citar:

Araújo, R.; Oliveira, S. A. G.; Guimarães, T. A.; "AN ANALYSIS OF THE CONTACT BETWEEN THE STENT AND THE ARTERY USING TUBE HIDROFORMING SIMULATION", p-515-525. In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1]. São Paulo: Blucher, 2014.
ISSN 23580828, DOI 10.5151/meceng-wccm2012-16825