选区激光熔融技术制备多孔支架及其单元结构的拓扑优化

发布时间：2018-01-14 21:22

本文关键词：选区激光熔融技术制备多孔支架及其单元结构的拓扑优化　出处：《北京工业大学学报》2017年04期 　论文类型：期刊论文

【摘要】：针对传统制造多孔结构具有的盲目性和不确定性以及如何将多孔结构有效的设计理念应用于实际制造的问题,提出了一种设计及制造具有多孔支架结构的方法.该方法通过设计单元结构,使其组成的多孔结构能在降低弹性模量的基础上保证结构的力学性能.首先,应用Optistruct软件对单元结构进行拓扑优化,提取优化的单元结构;然后,在Magics里将单元模型修复、阵列得到多孔支架,用选区激光熔融技术制造多孔支架;最后,对多孔结构的力学性能进行了测试.实验结果表明:多孔支架的弹性模量与抗压强度值均在骨骼的要求范围内.
[Abstract]:Aiming at the blindness and uncertainty of the traditional porous structure and how to apply the effective design concept of the porous structure to the practical manufacturing. In this paper, a method of designing and manufacturing porous scaffold structure is presented. By designing the unit structure, the porous structure can guarantee the mechanical properties of the structure on the basis of reducing the elastic modulus. Using Optistruct software to optimize the topology of the unit structure, extract the optimized unit structure; Then, the porous scaffold was fabricated by selective laser melting technology by repairing the cell model in Magics, and the porous scaffold was fabricated by array. Finally, the mechanical properties of porous structure are tested. The experimental results show that the elastic modulus and compressive strength of porous scaffold are within the required range of bone.
【作者单位】：北京市数字化医疗3D打印工程技术研究中心;北京工业大学激光工程研究院;
【基金】：北京市科技计划资助项目(K2101311201401)
【分类号】：TB383.4;R318.08
【正文快照】： 骨骼缺损是妨碍人体健康、影响人们幸福感的一大元凶.随着全球人口老龄化进程加速、人类寿命不断延长、交通事故频发以及运动创伤的增多等,都会导致骨骼的缺损,对于承重部位的骨缺损,通常需要力学性能较高的金属植入体.但受传统的制造工艺的影响,实心金属植入体有明显的不足,

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