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형상기억합금 트러스 구조물을 이용한 스텐트의 설계 및 해석
양성필(Seongpil Yang),김상헌(Sanghaun Kim),조맹효(Manghyo Cho) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
Recently, many patients related to heart disease have surgical operation by expanding a blood vessel to treat the angiostenosis. So far most angioplasties have been performed using balloon-dilative stent made of stainless steel. Some researchers are studying the stent made of shape memory alloy (SMA) to operate the angioplasty more easily. and there are several papers which introduce the angioplasty using SMA. However, most of the analysis models for stents are constructed using solid elements. So much computing time is required to solve the analysis model. In this study, we suggest the SMA stent model using 1D truss element which is much faster than stent model using 3D solid element. To represent non-linear behavior of SMA, we apply 1D SMA constitutive equation of Lagoudas’. Pseudo-elastic behavior of stent structures is presented as a numerical example.