State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; Department of Mechanical Engineering, Member of Flanders Make, KU Leuven (Catholic University of Leuven), Leuven 3001, Belgium.
State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
J Mech Behav Biomed Mater. 2019 Feb;90:73-85. doi: 10.1016/j.jmbbm.2018.09.042. Epub 2018 Sep 27.
Materials used for hard tissue replacement should match the elastic properties of human bone tissue. Therefore, cellular structures are more favourable for the use of implants than solid materials for their custom-designed mechanical properties. The superimposed load from various directions in vivo makes uniaxial compression testing insufficient for describing the mechanical responses. In this paper, the rotational symmetry of Gyroid cellular structure (GCS) was discussed. An approach using structural simplification and analytical solution was presented to investigate the relationship between Young's modulus and volume fraction, as well as the orientation dependence of the mechanical responses for GCS loaded in various orientations. It is concluded that the analytical solution is reasonable for a low volume fraction, through the comparison between analytical results, finite element (FE) and experimental data. Gained polar diagrams illustrate the anisotropic property of GCS and also confirm the superiority for their stable mechanical responses of diverse loading directions.
用于硬组织替代的材料应与人体骨组织的弹性特性相匹配。因此，与实心材料相比，细胞结构更有利于植入物的使用，因为它们具有定制的机械性能。体内来自各个方向的叠加负载使得单轴压缩测试不足以描述机械响应。在本文中，讨论了 Gyroid 细胞结构（GCS）的旋转对称性。提出了一种使用结构简化和解析解的方法来研究杨氏模量与体积分数之间的关系，以及在不同方向加载时 GCS 的机械响应的方向依赖性。通过将解析结果、有限元（FE）和实验数据进行比较，得出结论：对于低体积分数，解析解是合理的。获得的极图说明了 GCS 的各向异性特性，并也证实了它们在各种加载方向上具有稳定机械响应的优势。
