Structural Design and Mechanical Properties of 3D Printed Triply Periodic Minimal Surfaces Porous Tantalum Bionic Bone Scaffold

SHI Yi; Wurikaixi AIYITI; ZHANG Yutao

doi:10.7652/xjtuxb202412019

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Structural Design and Mechanical Properties of 3D Printed Triply Periodic Minimal Surfaces Porous Tantalum Bionic Bone Scaffold

更新时间：2025-07-28

- Structural Design and Mechanical Properties of 3D Printed Triply Periodic Minimal Surfaces Porous Tantalum Bionic Bone Scaffold
- Vol. 58, Issue 12, Pages: 197-207(2024)
- 作者机构：
  
  1. 新疆大学智能制造现代产业学院(机械工程学院),乌鲁木齐,830017
  2. 新疆工程学院机电工程学院,乌鲁木齐,830023
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202412019
  CLC： G665
- Online First：10 December 2024，
  
  Published：2024
- 稿件说明：
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SHI Yi, Wurikaixi AIYITI, ZHANG Yutao. Structural Design and Mechanical Properties of 3D Printed Triply Periodic Minimal Surfaces Porous Tantalum Bionic Bone Scaffold[J]. 2024, 58(12): 197-207.
DOI：

SHI Yi, Wurikaixi AIYITI, ZHANG Yutao. Structural Design and Mechanical Properties of 3D Printed Triply Periodic Minimal Surfaces Porous Tantalum Bionic Bone Scaffold[J]. 2024, 58(12): 197-207. DOI： 10.7652/xjtuxb202412019.

摘要

为了实现植入物与人体骨在生物力学和细胞相容性方面的匹配

综合评价了钽点阵结构的力学性能和渗透性能

以寻求可应用于钽多孔骨支架的最佳点阵结构。基于三周期极小曲面的不同建模方法

设计了6种类型的单元体结构

通过选区激光熔化工艺制备了相关钽点阵结构试样。通过准静态压缩试验获得点阵结构的力学性能

并记录破坏过程; 基于有限元软件Abaqus建立相对应的压缩模型

获取压缩过程中应力应变的变化; 利用COMSOL软件对点阵结构的渗透性能进行模拟分析。结果表明:片状结构的弹性模量、屈服强度和能量吸收均高于杆状结构

渗透率则低于杆状结构; G型和F-KS型杆状结构在50%应变下出现了脆性断裂的裂口; 6种钽点阵结构的弹性模量为3.8～6.1 GPa

屈服强度为47～107 MPa

介于皮质骨和松质骨的范围内; 6种结构的渗透率为6.5×10

-10

～3.97×10

-9

均在骨小梁的渗透率范围内。研究结果表明

所设计的钽点阵结构适用于骨支架

综合性能最好的是G型片状结构。

Abstract

In order to ensure compatibility between implants and human bone in terms of biomechanics and cell integration

a comprehensive evaluation of the mechanical and permeability properties of tantalum lattice structures is conducted to identify the optimal lattice structure for porous tantalum bone scaffolds. Six types of unit cell structures are designed based on various modeling approaches for triply periodic minimal surfaces. Samples of relevant tantalum lattice structures are pr

epared using selective laser melting technology. The mechanical characteristics of these lattice structures are determined through quasi-static compression tests

and the failure processes are documented. Utilizing the finite element software Abaqus

a compression model is developed to analyze stress-strain variations during compression. The permeability performance of the lattice structures is simulated and assessed using the COMSOL software. The findings reveal that the lamellar structure exhibits higher elastic modulus

yield strength

and energy absorption compared to the rod structure

while its permeability is lower. Particularly

the G-type and F-KS type rod structures demonstrate brittle fractures at a 50% strain. The elastic modulus of the six tantalum lattice structures ranges from 3.8 to 6.1 GPa

and the yield strength ranges from 47 to 107 MPa

aligning within the spectrum of cortical and cancellous bone. The permeability of the six structures ranges from 6.5×10

-10

to 3.97×10

-9

falling within the typical permeability range of trabeculae bone. These results affirm the suitability of the designed tantalum lattice structures for bone scaffolds

with the G-type lamellar structure displaying the best overall performance.

关键词

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