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Research Data from University of London Imperial College Update Understanding of Materials Engineering (Effect of Stent Radial Force on Stress...

August 20, 2014



Research Data from University of London Imperial College Update Understanding of Materials Engineering (Effect of Stent Radial Force on Stress Pattern After Deployment: A Finite Element Study)

By a News Reporter-Staff News Editor at Journal of Engineering -- Investigators publish new report on Materials Engineering. According to news reporting originating in London, United Kingdom, by VerticalNews journalists, research stated, "The present article presents a method for assessing the radial stiffness of nitinol stents. An idealized stent model was created, and its radial stiffness was calculated by means of finite element modeling."

The news reporters obtained a quote from the research from the University of London Imperial College, "The calculations were validated against experimental measurements. The variation of radial stiffness with geometrical dimensions was calculated, and the effect of increasing radial stiffness on endovascular deployment was analyzed. Peak tensile and compressive stresses as well as stent penetration were calculated in the case of an idealized pulmonary artery model having realistic dimensions as well as stiffness. The results of stress calculations were compared with a second set of simulations, where an idealized behavior of the stent (uniform expansion to a theoretical contact diameter) was modeled. The results show how in reality nitinol stents behave in a non-ideal way, having a non-uniform expansion and exerting non-uniform pressure on the contact areas with the artery. Such non-ideality decreases though with the increase in radial stiffness."

According to the news reporters, the research concluded: "The radial force alone may be insufficient in describing the stent-artery interaction, and numerical modeling proves to be necessary for capturing such complexity."

For more information on this research see: Effect of Stent Radial Force on Stress Pattern After Deployment: A Finite Element Study. Journal of Materials Engineering and Performance, 2014;23(7):2599-2605. Journal of Materials Engineering and Performance can be contacted at: Springer, 233 Spring St, New York, NY 10013, USA. (Springer - www.springer.com; Journal of Materials Engineering and Performance - www.springerlink.com/content/1059-9495/)

Our news correspondents report that additional information may be obtained by contacting A. Borghi, University of London Imperial College, Inst Biomed Engn, London, United Kingdom. Additional authors for this research include O. Murphy, R. Bahmanyar and C. McLeod.

Keywords for this news article include: London, Europe, United Kingdom, Materials Engineering

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Journal of Engineering


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