Design and performance prediction of voronoi porous structure by selective laser melting

被引：0
|
作者：
Zeng S.-J. [1 ]
Wu Q.-R. [1 ]
He J.-C. [2 ]
Wei T.-P. [1 ]
Ye J.-H. [1 ]
机构：
[1] School of Mechanical & Automotive Engineering, Fujian University of Technology, Fuzhou
[2] Department of Orthopaedics, Orthopaedic Institute, The First Affiliated Hospital, Soochow University, Suzhou
来源：
Guangxue Jingmi Gongcheng/Optics and Precision Engineering | 2021年 / 29卷 / 05期
关键词：
Grey relational analysis; Porous structure; Response surface methodology; Selective laser melting; Voronoi;
D O I：
10.37188/OPE.20212905.1059
中图分类号：
学科分类号：
摘要：
To satisfy the requirements of mechanical property and biocompatibility of porous implants in the medical field, a parametric design method of generating a controllable porous structure using the Voronoi-tessellation algorithm was studied. The Box-Behnken design was developed with the strut diameter, irregularity, and unit distance as structural parameters and elastic modulus, compressive strength, and porosity as response targets. The optimal structural parameters of multi-response targets were obtained by combining the grey relational analysis (GRA), and the grey relational grade prediction model was established. The accuracy of the model was verified by the analysis of variance. The results show that strut diameter is the most significant factor affecting the performance of the porous structure. The optimum structural parameters of the irregular porous structure are as follows: strut diameter of 0.3 mm, irregularity of 0.5, and unit distance of 2 mm. Subsequent to performing confirmatory experiments, we obtained the sample with an elasticity modulus of 2.987 GPa, compressive strength of 210.048 MPa, porosity of 89.43%, and GRG of 0.789 5. The optimization results are in good agreement with the predicted results, and the error is 1.2%, indicating that the optimization method is feasible.
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页码：1059 / 1071
页数：12
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