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The addition of microstructures to the inner surface of the stent reduces resistance and inhibits the phenomenon of blood adhesion. In this study, the design of a fish-scale microstructured vascular stent was proposed based on bionics, and its main design parameters were optimized using the finite element method. In addition, the hemodynamic effects of a standard stent and a fish-scale microstructured stent on an ideal cerebral aneurysm were comparatively analyzed. The results showed that the fish-scale microstructured stent significantly accelerated intraluminal blood flow velocity by 11.6% compared to the standard stent. In addition, the fish-scale microstructured stent was able to reduce blood flow into the aneurysm lumen by 28.6%.
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http://dx.doi.org/10.1080/10255842.2025.2465343 | DOI Listing |
Materials (Basel)
August 2025
Department of Chemical and Materials Engineering, University of Auckland, Auckland 1010, New Zealand.
This study investigates the wear performance of 20CrMnTi steel, a commonly used material for spiral bevel gears, after heat treatment, with a focus on the microstructural evolution and wear behavior in both the surface and gradient direction of the carburized layer. The results show that the microstructure composition in the gradient direction of the carburized layer gradually transitions from martensite and residual austenite to a martensite-bainite mixed structure, and eventually transforms to fully bainitic in the matrix. With the extension of carburizing time, both the effective carburized layer depth and the hardened layer depth significantly increase.
View Article and Find Full Text PDFComput Methods Biomech Biomed Engin
February 2025
Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, China.
The addition of microstructures to the inner surface of the stent reduces resistance and inhibits the phenomenon of blood adhesion. In this study, the design of a fish-scale microstructured vascular stent was proposed based on bionics, and its main design parameters were optimized using the finite element method. In addition, the hemodynamic effects of a standard stent and a fish-scale microstructured stent on an ideal cerebral aneurysm were comparatively analyzed.
View Article and Find Full Text PDF3D Print Addit Manuf
October 2024
School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou, China.
The high-temperature mechanical properties and fracture mechanism of selective laser melting (SLM) manufactured nickel-based alloy are highly important for its application. In this article, small punch test (SPT) method is used to study the mechanical properties of SLM-manufactured GH4169 over a wide temperature range from 25°C to 600°C. With the increase of temperature, the decreasing ratio of maximum load is only 18.
View Article and Find Full Text PDFIn August 2016, Shu-Hong Yu's group at the University of Science and Technology of China published an article in , reporting the first artificial nacre material obtained by imitating the growth process of natural nacre. The artificial nacre has a chemical composition and microstructure highly similar to that of natural nacre, and therefore is both strong and tough. Over the past two decades, Yu's team has been focusing on the field of biomimetic materials.
View Article and Find Full Text PDFBiomimetics (Basel)
October 2024
The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China.
Dung beetle leg joints exhibit a remarkable capacity to support substantial loads, which is a capability significantly influenced by their surface microstructure. The exploration of biomimetic designs inspired by the surface microstructure of these joints holds potential for the development of efficient self-locking structures. However, there is a notable absence of research focused on the surface microstructure of dung beetle leg joints.
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