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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Comparison of elastic properties of open-cell metallic biomaterials with different unit cell types
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Comparison of elastic properties of open-cell metallic biomaterials with different unit cell types

机译：不同单位细胞类型的开放式金属生物材料弹性性能的比较

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摘要

Additive manufacturing techniques have made it possible to create open-cell porous structures with arbitrary micro-geometrical characteristics. Since a wide range of micro-geometrical features is available for making an implant, having a comprehensive knowledge of the mechanical response of cellular structures is very useful. In this study, finite element simulations have been carried out to investigate the effect of structure unit cell type (cube, rhombic dodecahedron, Kelvin, Weaire-Phelan, and diamond), cross-section type (circular, square, and triangular), strut length, and relative density on the Young's modulus, shear modulus, yield stress, shear yield stress, and Poisson's ratio of open-cell tessellated cellular structures. It was desired to see whether or not and to what extent each of the aforementioned parameters affect the mechanical properties of a porous structure. It was seen that the strut cross-section type does not have a considerable effect on the structure Young's modulus while its effect on the structure yield stress is significant. The strut length was not effective on the mechanical properties if the relative density was kept constant. It was also observed that the structure unit cell type and relative density have a considerable effect on the elastic properties. The highest and the lowest stiffness and strength belonged to the cube and diamond unit cell types, respectively. The rhombic dodecahedron structure with circular cross-section had a high yielding strength (second among all the cases) while its Young's modulus was relatively low. Therefore, it is the best choice for applications with low stiffness requirements, such as biomedical implants. (c) 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 386-398, 2018.
机译：添加剂制造技术使得可以产生具有任意微观几何特征的开放式电池多孔结构。由于各种微观几何特征可用于制造植入物，因此具有综合了解蜂窝结构的机械响应非常有用。在这项研究中，已经进行了有限元模拟，以研究结构单元型细胞类型（立方体，菱形十二锭，开尔文，令人无人机和钻石），横截面类型（圆形，方形和三角形），支柱的效果杨氏模量，剪切模量，屈服应力，剪切屈服应力和泊松比例的开放式细胞曲面细胞结构的长度和相对密度。期望看看是否和每个上述参数的程度是如何影响多孔结构的机械性能。有人看出，支柱的横截面类型对结构杨氏模量没有相当大的影响，而其对结构屈服应力的影响是显着的。如果相对密度保持恒定，则支柱长度对机械性能无效。还观察到，结构单元电池类型和相对密度对弹性性能具有相当大的影响。分别属于立方体和金刚石单元细胞类型的最高和最低刚度和强度。具有圆形横截面的菱形十二锭结构具有高屈服强度（在所有情况下秒），而其杨氏模量相对较低。因此，它是具有低刚度要求的应用的最佳选择，例如生物医学植入物。 （c）2017年Wiley期刊，Inc。J生物保解率B部分：苹果生物检索物，106B：386-398,2018。

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