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钛合金变形Gyroid单元多孔结构设计与分析
作者单位:

1.武汉理工大学;2.华中科技大学同济医学院

中图分类号:

TB383

基金项目:

国家重点研发计划(项目号2018YFB1105503)


Design and analysis of porous structure of titanium alloy deformed Gyroid unit
Author:
Affiliation:

1.Wuhan University of Technology;2.Tongji Medical College,Huazhong University of Science Technology

Fund Project:

The National Key R&D Program of China

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    摘要:

    三周期极小曲面(Triply Periodic Minimal Surfaces,TPMS)多孔结构研究广泛,但变形TPMS多孔结构研究较少,而变形TPMS多孔结构在一定方向上的力学性能存在潜在优势。研究Gyroid单元多孔结构的参数化设计方法,采用选择性激光熔融成型技术(Selective Laser Melting,SLM)制备出孔隙率为60%和75%的常规和变形Gyroid单元多孔钛合金样件。通过Micro-CT观察样件的形貌特征,内部连通性良好,未发现有明显的结构断裂和孔隙堵塞。采用Instron电子万能材料试验机进行力学压缩试验,结果表明:孔隙率为60%的变形Gyroid单元多孔结构的抗压强度相比常规Gyroid单元多孔结构增加49.3%,弹性模量增加63.5%;孔隙率为75%时抗压强度增加40.5%,弹性模量增加70.5%。研究结果表明,在相同孔隙率的情况下,长轴在压缩方向上的变形Gyroid单元结构具有更优的力学性能。

    Abstract:

    The porous structure of triply periodic minimal surfaces (TPMS) has been studied extensively, but the porous structure of deformed TPMS is less studied, and the porous structure of deformed TPMS has potential advantages in the mechanical properties in a certain direction. The parametric design method of the porous structure of the Gyroid cell is studied, and the normal and deformed porous titanium alloy samples of the Gyroid cell with the porosity of 60% and 75% are prepared by the selective laser melting molding technology (SLM). The morphological characteristics of the sample were observed by Micro-CT, and the internal connectivity was good, and no obvious structural fracture and pore blockage were found. The Instron electronic universal material testing machine was used to carry out the mechanical compression test. The results showed that the compressive strength of the porous structure of the deformed Gyroid unit with a porosity of 60% increased by 49.3% compared with the porous structure of the normal Gyroid unit, and the elastic modulus increased by 63.5%; When the porosity is 75%, the compressive strength increases by 40.5% and the elastic modulus increases by 70.5%. The research results show that under the same porosity, the deformed Gyroid unit structure of the long axis in the compression direction has better mechanical properties.

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石志良,高 杰,王 伟,肖 骏,齐大虎.钛合金变形Gyroid单元多孔结构设计与分析[J].稀有金属材料与工程,2022,51(7):2631~2636.[Shi Zhiliang, Gao Jie, Wang Wei, Xiao Jun, Qi Dahu. Design and analysis of porous structure of titanium alloy deformed Gyroid unit[J]. Rare Metal Materials and Engineering,2022,51(7):2631~2636.]
DOI:10.12442/j. issn.1002-185X.20210558

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  • 收稿日期:2021-06-30
  • 最后修改日期:2021-08-24
  • 录用日期:2021-08-25
  • 在线发布日期: 2022-07-29
  • 出版日期: 2022-07-27