重型机械Issue(3)：57-65,9.
基于独角仙仿生的晶格结构力学性能研究
Research on the mechanical properties of lattice structures based on hercules beetle biomimetics
摘要
Abstract
This study utilizes 6061 aluminum alloy powder as the raw material and systematically investigates the design methodology and mechanical properties of lattice structures based on metal 3D printing technology.A novel lattice structure with biomimetic characteristics and multi-stage compression properties is proposed.At the design level,a hierarchical gradient design strategy is introduced,constructing a new lattice structure(L12)that incorporates curved connecting rods and hierarchical gradients,achieving staged mechanical responses.Through structural optimization,transverse reinforcement rods are added,transforming the damage mode from outward expansion to inward concavity,further enhancing mechanical performance.The optimized lattice structure(LO)exhibits a 29.37%increase in maximum load-bearing capacity and a 28%improvement in specific energy absorption,with only a 3.17%increase in weight.Axial compression tests on single-layer and double-layer lattice structures reveal that the specific energy absorption of the single-layer structure is 46.5%higher than that of the double-layer structure,highlighting the critical impact of interface connection design.Three-point bending experiments demonstrate that the bending load-bearing capacity of horizontally arranged lattice structures is 61.2%higher than that of vertically arranged ones,with reduced damage extent.It proves that bending strength is primarily influenced by the size of transverse support columns.Computed tomography(CT)scanning experiments reveal the four-stage characteristics of damage evolution in the lattice structure:micro-crack initiation,crack propagation,delamination and overall collapse.关键词
金属3D打印/力学测试/计算机断层扫描/仿生结构Key words
metal 3D printing/mechanical testing/computed tomography/biomimetic structures分类
矿业与冶金引用本文复制引用
薛子腾,赵广辉,郭庆成,侯少奎..基于独角仙仿生的晶格结构力学性能研究[J].重型机械,2025,(3):57-65,9.基金项目
国家自然科学基金(52475391) （52475391）
山西省基础研究计划(20210302123207) （20210302123207）
山西省研究生实践创新项目(2024SJ298) （2024SJ298）
