Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 16, 2019 - September 18, 2019
Indwelling of stents is performed as one of the treatment methods for stenosis and obstruction such as blood vessels etc., while medical stents are still required to have much higher flexibility and durability. In spite of concerns about stress concentrations and fatigue failures caused by pulsations due to design and manufacturing methods of shape structures in conventional medical stents, new medical stent devices with higher strength and flexibility to follow the bending, twisting, stretching etc. in blood vessels such as the femoral artery etc. are desired and evaluated in this research. Mesh structures with high strength and high flexibility are firstly designed for medical stent models using 3-dimensional CAD tools. Different design variables such as basic mesh shape (Triangular and Quadra), arm angle (θ) and shape number (n) are introduced for parametrical evaluations. The influences of design variables of mesh structures on meshed stent models’ surface void content, compressive properties etc. were evaluated through finite element analysis. Further studies on three dimensional bending and torsional properties of such meshed stent models need to be carried out to realize the practical medical meshed stents with higher performances of flexibility and durability etc.
