Numerical modeling of biodegradable stent corrosion

One of the most common diseases in human societies today is obstruction of the coronary arteries of the heart in old age, which disrupts the normal flow of blood to the organs of the body, and in cases such as the coronary arteries of the heart, which are responsible for supplying blood to the heart muscle. It can turn into a dangerous issue that can eventually lead to a heart attack.

Numerical modeling of biodegradable stent corrosion

Numerical modeling of biodegradable stent corrosion

One of the new ways to treat this complication and open the vital arteries is to use a device called a stent. Biodegradable materials are materials that can be decomposed naturally or by environmental activities and can be used in the production of various materials such as paper, plastic, etc. One of the applications of biodegradable materials is their use in the production of stents, one of the advantages of which is the gradual disappearance of the stent after a certain period of time in the body.

Numerical modeling of biodegradable stent corrosion

Numerical modeling of biodegradable stent corrosion

Numerical modeling of biodegradable stent corrosion

One of the effective factors in the success of stent use is the correct analysis of its mechanical behavior. In this project, a biodegradable stent sample containing reliable laboratory data was selected by studying the existing designs. Then its mechanical behavior was investigated using the finite element analysis (FEA) method. For this purpose, first, the stent corrosion failure model with a specific material was determined and then this model was used for coding in the UMAT subroutine space of Abaqus software for a dumbbell piece sample. The results of numerical modeling of stent corrosion were compared with the laboratory results of the same model. The adaptation of the results was very good. The artery was then modeled and a stent was placed. In this way, the mechanical behavior of the stent was thoroughly studied and evaluated. The performance of this stent was simulated in very close to real conditions and its results were delivered to the esteemed employer to continue the research and development (R&D) and laboratory samples.

Stent-and-balloon-in-abaqus

Stent-and-balloon-in-abaqus

Biodegradable stent corrosion modeling project achievements

  • Determining the corrosion model for the material used to make the stent
  • Production of UMAT program predicts cavity corrosion and uniform stents
  • Generate Python script in Abacus software to map basic corrosion information
  • Comparison of the results of numerical modeling of stent corrosion for dumbbell specimens with experimental results
  • Modeling a part of the artery completely
  • Stent placement in an artery
  • Investigation of complete mechanical behavior of stents

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Stent with Abaqus simulation (FEA)

Stent with Abaqus simulation (FEA)