单胞构型和结构参数对SLM成形梯度点阵结构压缩性能的影响  

Effect of Cell and Structural Parameter on Compression Properties of SLMed Gradient Lattice Structures

作　　者：张博[1,2] 王国伟 孙明艳 秦煜[1] 沈显峰 王超[1] 黄姝珂[1] 方辉[2] Zhang Bo;Wang Guowei;Sun Mingyan;Qin Yu;Shen Xianfeng;Wang Chao;Huang Shuke;Fang Hui(Institute of Machinery Manufacturing Technology,China Academy of Engineering Physics,Mianyang 621900,China;School of Mechanical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]中国工程物理研究院机械制造工艺研究所,四川绵阳621900 [2]四川大学机械工程学院,四川成都610065

出　　处：《稀有金属材料与工程》2024年第4期1021-1031,共11页Rare Metal Materials and Engineering

基　　金：中国工程物理研究院创新发展基金(CX20210005);国家自然科学基金(52101057)。

摘　　要：梯度点阵结构由于压缩时具有优秀的吸能能力,目前常作为吸能组件被应用于航天、国防和医疗等领域。但随着现代工业的发展,工程领域对其压缩性能提出了更高的要求,为使其进一步优化,有必要探讨单胞构型、结构参数和压缩性能之间的关系。因此本研究通过选区激光熔化(selective laser melting,SLM)成形了2种梯度差的AlSi10Mg变杆径梯度体心立方(body-centered cubic,bcc)和金刚石(diamond,Diam)结构,结合有限元分析(finite element analysis,FEA)研究梯度差对压缩性能的影响,并对2种单胞构型进行对比。准静态单轴压缩实验的结果表明,在同相对密度下,当单胞构型相同时,随着梯度差的增加单位体积吸能量明显增加,而梯度差相同时,Diam梯度点阵结构的压缩模量、屈服强度、抗压强度和最大峰值应力均高于bcc,同时其单位体积吸能量和吸能效率也高于bcc。Gradient lattice structure is commonly used as energy-absorbing components in aerospace,national defense and medical fields due to its excellent energy absorption ability when compressed.However,with the development of modern industry,the engineering field has put forward higher requirements for its compression properties.To achieve further optimization,it is necessary to study the relationship between compression properties and cell,structural parameters.Two AlSi10Mg rod-diameter-change gradient body-centered cubic(bcc)and diamond(Diam)structures with different gradient gaps were formed by selective laser melting(SLM)to investigate the effect of gradient gap on the compression properties combined with finite element analysis(FEA),and the two cells were compared.The results of quasi-static uniaxial compression experiments show that the absorbed energy per unit volume increases significantly with the increase in gradient gap at the same relative density with the same cell.The compressive modulus,yield strength,compressive strength and peak stress of Diam gradient lattice structure are higher than those of bcc structure when the gradient gap and relative density are the same,and its absorbed energy per unit volume and energy absorption efficiency are also higher than those of bcc structure.

关 键 词：选区激光熔化 梯度点阵结构 压缩性能 有限元分析 

分 类 号：TG146.21[一般工业技术—材料科学与工程]