基于TPMS的多孔结构力学性能研究  

STUDY ON MECHANICAL PROPERTIES OF POROUS STRUCTURES BASED ON TPMS

作　　者：王茂华 段明德[1] 杨子威 张壮雅[1] 王沛 韩宗政 WANG MaoHua;DUAN MingDe;YANG ZiWei;ZHANG ZhuangYa;WANG Pei;HAN ZongZheng(College of Mechanical and Electrical Engineering,Henan University of Science and Technology,Luoyang 471003,China;Luoyang Northern Enterprises Group,Luoyang 471031,China;Institute of Additive Manufacturing,Shenzhen University,Shenzhen 518060,China)

机构地区：[1]河南科技大学机电工程学院,洛阳471003 [2]洛阳北方企业集团有限公司,洛阳471031 [3]深圳大学增材制造研究所,深圳518060

出　　处：《机械强度》2022年第2期424-431,共8页Journal of Mechanical Strength

基　　金：深圳市国际合作研究项目(GJHZ20190822095418365);深圳大学新引进教师科研启动项目(2019040)资助。

摘　　要：为探究不同TPMS孔隙结构对多孔支架力学性能的影响,采用隐函数表达的TPMS作为构建微观多孔结构的基础孔隙单元,通过定义距离函数构建不同结构特征的TPMS多孔支架,并应用SLM制备了AlSi10Mg多孔支架;采用有限元法分析和力学试验方法,研究不同孔隙结构特征对多孔TPMS支架力学性能的影响,分析不同距离函数k值对Primitive(P)和F-RD多孔结构支架孔隙率、弹性模量、屈服强度和失效的影响规律。有限元分析及试验结果表明随着距离函数k的增加,P单元多孔支架的弹性模量和屈服强度呈上升趋势,而FRD单元多孔支架弹性模量和屈服强度则呈下降趋势,且相对于FRD单元,P单元构建的多孔支架更容易被压溃,通过对TPMS的类型及函数k值的控制,可有效的对多孔支架孔隙率、弹性模量以及屈服强度进行调节。研究结果为组织工程骨支架设计提供了相关依据。In order to explore the influence of different TPMS pore structures on the mechanical properties of the porous scaffold, TPMS expressed by implicit function was used as the basic pore unit to construct the micro-porous structure. TPMS porous scaffolds with different structural characteristics were constructed by defining the distance function, And AlSi10 Mg porous scaffolds were prepared by SLM. Finite element Method(FEM) analysis and mechanical test method were used to study the influence of different pore structure characteristics on mechanical performance of porous TPMS scaffolds and analyze the influence law of different distance function k values on porosity, elastic modulus, yield strength and failure of Primitive(P) and F-RD porous structure scaffolds. Finite element analysis and experimental results show that with the increase of distance function k, the elastic modulus and yield strength of the P unit porous scaffold presented an increasing trend, However, the elastic modulus and yield strength of the FRD unit porous scaffold showed a downward trend, Moreover, Comparing to FRD unit, P unit porous scaffolds were more likely to be crushing, through the control of the TPMS types and the distance function k value, the porosity, elastic modulus and yield strength of the porous scaffold can be effectively adjusted. The results provide a basis for the design of tissue-engineered bone scaffolds.

关 键 词：TPMS 孔隙结构 力学性能 多孔支架 距离函数k 

分 类 号：TG146.2[一般工业技术—材料科学与工程]