点阵结构填充模型的边界强化设计方法  

Method of Boundary Strengthening Design for Lattice Structure Filling Model

作　　者：任利民 戴宁[1] 程筱胜[1] 龚赛 REN Limin;DAI Ning;CHENG Xiaosheng;GONG Sai(College of Mechanical & Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing,210016)

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《中国机械工程》2021年第5期594-599,共6页China Mechanical Engineering

基　　金：国家自然科学基金(51775273);国防基础科研计划(JCKY2018605C010);国防创新特区项目(18-163-12-ZT-004-063-01);江苏省重点研发计划(BE2018010-2);南京航空航天大学“直升机传动技术重点实验室”自主课题(HTL-A-19G012)。

摘　　要：对于填充均质点阵结构的零部件,其失效往往首先出现在近边界端的梁模型处,外部载荷无法有效传递至点阵结构内部。针对上述问题,提出一种参数化边界强化技术,实现了连接牢固的“点阵实体”优化模型设计。以连杆零件为例,将优化模型与等体积的均质点阵结构填充模型进行了对比验证。结果表明,所提方法保证了载荷的有效传递,且边界连接处更加牢固。For the parts filled with homogeneous lattice structure,failure usually occurs at beams which near the boundary connection,and external load cannot be transferred to interior of lattice structure effectively.To solve this problem,a parameterized boundary strengthening technique was proposed to realize the design of“lattice-part”optimization model with solid connection.Taking connecting rod part as an example,the optimized model was compared with the homogeneous lattice filling model with equal volume.The results show that the proposed method ensures the effective transfer of load,and the model has better firmer boundary connection.

关 键 词：3D打印 晶体点阵 功能梯度材料 力学性能 

分 类 号：TH140[一般工业技术—材料科学与工程]