摘要
三周期极小曲面(Triply Periodic Minimal Surface,TPMS)曲率为零,具有相连通的高孔隙率结构,能够更好地适应细胞增长、营养物输送和代谢物排出。基于传统CAD的TPMS多孔结构设计,孔隙率、孔径大小与TPMS曲面参数未建立明确的对应关系,设计缺乏灵活性。通过探究阈值和周期对孔隙率的影响关系,提出一种TPMS多孔结构参数化设计方法。基于TPMS设计孔单元,研究发现阈值与孔隙率基本呈线性关系,周期与孔隙率无关,但周期的改变会显著影响模型的孔径大小。由此将阈值和周期作为参数化设计的主要参数输入,可自动生成孔隙率和孔径大小可控的多孔结构。该方法实现于Rhinoceros的Grasshopper(GH)插件,并进行实例验证。
The Triply Periodic Minimal Surface(TPMS)has zero curvature,and the scaffold has a connected high-porosity struc-ture that can better adapt to cell growth,nutrient flow and metabolite discharge.Based on traditional CAD-based TPMS porous scaffold design,the porosity,pore size and TPMS surface parameters have not established a clear correspondence,and the design lacks flexibility.By exploring the influence of threshold and period on porosity,a parametric design method for TPMS porous scaf-fold is proposed.Based on the TPMS design of the pore unit,the study found that the threshold and porosity are basically linear,and the period has nothing to do with the porosity,but the change of the period will significantly affect the pore size of the model.As a result,threshold and period are input as the main parameters of parametric design,and porous scaffolds with controllable porosity and pore size can be automatically generated.The method is implemented in the Grasshopper(GH)plug-in of Rhinocer‐os,and example verification was also carried out.
作者
石志良
王伟
卢小龙
张亚
SHI Zhi-liang;WANG Wei;LU Xiao-long;ZHANG Ya(School of Mechanical&Electronic Engineering,Wuhan University of Technology,Hubei Wuhan 430070,China;Tongji Medical College,Huazhong University of Science and Technology,Hubei Wuhan 430070,China)
出处
《机械设计与制造》
北大核心
2024年第6期265-270,共6页
Machinery Design & Manufacture
基金
国家重点研发计划项目(2018YFB1105503)。
关键词
三周期极小曲面
多孔结构
参数化设计
阈值
周期
Triply Periodic Minimal Surfaces(TPMS)
Porous Structure
Parametric Design
Threshold
Period
