多孔钛合金拓扑优化设计及性能研究  

Topology Optimization Design and Performance Study of Porous Titanium Alloys

作　　者：张永弟[1] 孙宝钰 王伟志 杨光[1] Zhang Yongdi;Sun Baoyu;Wang Weizhi;Yang Guang(School of Mechanical Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China)

机构地区：[1]河北科技大学机械工程学院,河北石家庄050018

出　　处：《稀有金属材料与工程》2024年第3期807-814,共8页Rare Metal Materials and Engineering

基　　金：河北省自然科学基金(E2017208128);河北省技术创新引导计划(20477706D);中央引导地方科技发展资金(206Z1806G);石家庄市科学技术研究与发展计划(201200313A)。

摘　　要：为了得到具有良好力学性能和高渗透性的钛合金多孔结构,需要在多孔结构的孔隙率与强度之间保持权衡。以人体膝关节胫骨假体为研究对象,首先,根据胫骨受力状态,采用拓扑优化设计并重构不同载荷工况下的抗压、抗剪单胞结构(TO-P1、TO-P2、TO-S1、TO-S2),与几种常见的基本单胞结构(bcc、fcc、rdc、dcc)进行研究比较;其次,通过对不同类型多孔钛合金进行压缩、剪切性能仿真,研究不同拓扑形态的多孔钛合金关于抗压、抗剪的力学性能,并采用SLM技术成型多孔钛合金压缩试件,验证了仿真分析的有效性;最后,选择力学性能较优的4种多孔钛合金进行渗透性分析。结果表明,TO-S2结构的抗压、抗剪力学性能和渗透性能最为出色,适合作为压剪载荷类植入物的多孔结构。To obtain titanium alloy porous structures with good mechanical properties and high permeability,a trade-off between the porosity of the porous structure and its strength needs to be maintained.Taking human knee tibial p rosthesis as the research object,firstly,according to the stress state of the tibia,topology optimization was used to design and reconstruct the compressive and shear cell structures(TO-P1,TO-P2,TO-S1,TO-S2)under different loading conditions,and several common basic cell structures(bcc,fcc,rdc,dcc)were studied and compared;secondly,through compression and shear performance simulation of different types of porous titanium alloys,the mechanical properties of different topologies of porous titanium alloys were studied,and the porous titanium alloy compression samples were formed by SLM technology,and the validity of the simulation analysis was verified;finally,four porous titanium alloys with better mechanical properties were selected for permeability analysis.The results show that the TO-S2 structure has the best compressive,shear mechanical properties and permeability,and it is suitable for porous structures of compression-shear load type implants.

关 键 词：多孔结构 拓扑优化 TI6AL4V合金 选区激光熔化 力学性能 渗透性能 

分 类 号：TB383[一般工业技术—材料科学与工程] TH122[机械工程—机械设计及理论]