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设计了6种Ti-6Al-4V人工骨支架,利用SLM(选择性激光熔化)进行制备。采用万能材料试验机结合高速摄像机分析支架的压缩过程,并利用Ansys软件进行应力分析。结果表明:支架的立柱直径对支架的力学性能影响较大,横梁直径对其影响较小;在相同高度下,支架横梁直径增大、层数增多或立柱直径增大,均使结构长/径比减小,使结构稳固且支架承载能力提高;支架的力学性能应与周围骨组织相匹配,经过分析,有3种结构的支架力学性能与人体股骨相近,故可作为股骨的人工骨支架。
Six Ti-6Al-4V artificial bone scaffolds were designed and fabricated using SLM (Selective Laser Melting). The compression process of the stent is analyzed by a universal testing machine combined with a high-speed video camera, and the stress analysis is carried out by Ansys software. The results show that the diameter of the column has a great influence on the mechanical properties of the stent, and the diameter of the beam has less influence on the stent. At the same height, the beam diameter increases, the number of layers increases or the diameter of the column increases, Compared with the surrounding bone tissue, the mechanical properties of the stent should be matched with the surrounding bone tissue. After analysis, the mechanical properties of the stent with three structures are similar to the human femur, so it can be used as the artificial bone scaffold of the femur.