Stress and strain distribution in expanded coronary stents depending on applied material

Idziak-Jabłońska, Aneta

doi:10.17512/jamcm.2015.2.03

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…A grid with elements was generated for the obtained geometrical models in order to carry out calculations by means of the finite element method [15,16]. Discretization was carried out by means of the element of 3D SOLID type and the analysed cases were discretized with eight-node elements.…”

Section: Table 1 Dimensions Of Individual Stent Parametersmentioning

confidence: 99%

Numerical Analysis of Mechanical Phenomena in Coronary Stent Made of Titanium Alloy Ti-13Nb-13Zr

Idziak-Jabłońska

2016

KEM

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Using the finite element method, this study determined mechanical characteristics of slotted-tube stents. The numerical calculations were carried out using ADINA v.8.8 software. Three models with different number of segments were used. The analysis was carried out for the titanium-matrix alloys Ti-13Nb-13Zr. Assuming the actual conditions of stent implantation, the stent is expected to expand to the diameter of 3.0 mm i.e. until it reaches the internal diameter of a healthy coronary vessel. The effect of the stent geometry was analysed, with emphasis on examination of the effect of key mechanical phenomena such as expansion pressure and suitable level of stress and plastic strain in stents. Analysis of the degree of foreshortening and dogboning after stent expansion was also carried out. The following assumptions were adopted in order to determine mechanical properties of stents: implantation at low expansion pressure, limitation of foreshortening ≤ 2%, low increase in the implant diameter in the beginning and at the end of the stent (dogboning effect).

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Section: Table 1 Dimensions Of Individual Stent Parametersmentioning

confidence: 99%

Numerical Analysis of Mechanical Phenomena in Coronary Stent Made of Titanium Alloy Ti-13Nb-13Zr

Idziak-Jabłońska

2016

KEM

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“…This allows for optimization of geometrical characteristics of the implant and its biomechanical properties [5]. Numerical simulations can be successfully used for determination of a number of parameters which are critical to the clinical assessment of specific stent designs e.g.…”

Section: Numerical Model Of a Coronary Stentmentioning

confidence: 99%

Numerical modelling of mechanical phenomena in coronary stents

Idziak-Jabłońska¹

Selected Topics in Contemporary Mathematical Modeling

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Abstract. Using the finite element method and mathematical models, this study determined mechanical characteristics of slotted-tube stents. A calculation model was developed and a type of material used for coronary slotted-tube stents was chosen in order to evaluate the biomechanical response to changes in geometrical parameters of stents. The numerical calculations were carried out using ADINA software. Stents were made of the four materials, i.e. austenitic steel 316L (Cr-Ni-Mo), cobalt-matrix alloy (Co-Cr-W-Ni) and two titanium-matrix alloys . The effect of the stent geometry was analysed, with emphasis on examination of the effect of key mechanical phenomena such as expansion pressure and a suitable level of stress and plastic strain in stents. Analysis of the degree of foreshortening and dogboning after stent expansion was also carried out.

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