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Simulation Analysis and Performance Study of CoCrMo Porous Structure Manufactured by Selective Laser Melting

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Abstract

To fabricate porous implants with improved biocompatibility and mechanical properties that are matched to their application using selective laser melting (SLM), flow within the mold and compressive properties and performance of the porous structures must be comprehensively studied. Parametric modeling was used to build 3D models of octahedron and hexahedron structures. Finite element analysis was used to evaluate the mold flow and compressive properties of the parametric porous structures. A DiMetal-100 SLM molding apparatus was used to manufacture the porous structures and the results evaluated by light microscopy. The results showed that parametric modeling can produce robust models. Square structures caused higher blood cell adhesion than cylindrical structures. “Vortex” flow in square structures resulted in chaotic distribution of blood elements, whereas they were mostly distributed around the connecting parts in the cylindrical structures. No significant difference in elastic moduli or compressive strength was observed in square and cylindrical porous structures of identical characteristics. Hexahedron, square and cylindrical porous structures had the same stress–strain properties. For octahedron porous structures, cylindrical structures had higher stress–strain properties. Using these modeling and molding results, an important basis for designing and the direct manufacture of fixed biological implants is provided.

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Acknowledgments

The study was funded by the Henan Provincial Science and Technology Project (182102310072) and the Start-up Funds for High Level Talents of Zhoukou Normal University (No. ZKNUC 72019). Also, this work was supported by Analytical and Testing Center of SCUT for carrying out compression performance test.

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Authors and Affiliations

  1. School of Mechanical and Electrical Engineering, Zhoukou Normal University, Zhoukou, 466000, Henan, People’s Republic of China

    Zhang Guoqing, Li Junxin, Li Jin & Zhang Chengguang

  2. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640, Guangdong, People’s Republic of China

    Xiao Zefeng

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  1. Zhang Guoqing
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  2. Li Junxin
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  4. Zhang Chengguang
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Correspondence to Zhang Guoqing.

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Guoqing, Z., Junxin, L., Jin, L. et al. Simulation Analysis and Performance Study of CoCrMo Porous Structure Manufactured by Selective Laser Melting. J. of Materi Eng and Perform 27, 2271–2280 (2018). https://doi.org/10.1007/s11665-018-3349-z

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  • DOI: https://doi.org/10.1007/s11665-018-3349-z

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