CAJ | 학술논문

血管支架最有潜力的发展方向是生物可降解聚合物血管支架，而支架的膨胀性能直接影响血管支架的质量和应用。利用有限元方法，采用von Mises屈服和各向同性强化准则，通过与316L不锈钢和WE43镁合金两种支架材料进行对比，分析了聚左旋乳酸（PLLA ）材料支架的膨胀性能。结果表明，PL L A新型血管支架具有良好的均匀膨胀性、轴向短缩性和柔顺性，但其回弹性能有待改善。
혈관지가최유잠력적발전방향시생물가강해취합물혈관지가，이지가적팽창성능직접영향혈관지가적질량화응용。이용유한원방법，채용von Mises굴복화각향동성강화준칙，통과여316L불수강화WE43미합금량충지가재료진행대비，분석료취좌선유산（PLLA ）재료지가적팽창성능。결과표명，PL L A신형혈관지가구유량호적균균팽창성、축향단축성화유순성，단기회탄성능유대개선。
Biodegradable polymer stent is becoming a promising stent ,and its expansion performance significantly affects the quality and application of stent .Based on the von Mises yield and isotropic hardening criteria ,compared with 316L stainless steel stent and WE43 magnesium alloy stent ,the expansion performance of poly L-lactic acid (PLLA) stent was analyzed via the finite element method . It is found that the new PLLA stent has better uniform expansion ,foreshortening and flexibility than the other two stents ,but the recovery performance needs to be improved .