选区激光熔化拱形点阵力学性能影响及优化  

Effect and optimization of mechanical properties of selected laser melting arch lattice

作　　者：潘文瀚 许明三 韦铁平 叶建华 朱峰立 杨林沂 PAN Wenhan;XU Mingsan;WEI Tieping;YE Jianhua;ZHU Fengli;YANG Linyi(Fujian Key Laboratory of Intelligent Machining Technology and Equipment,Fujian University of Technology,Fuzhou 350118,China;School of Mechanical&Automotive Engineering,Fujian University of Technology,Fuzhou 350118,China)

机构地区：[1]福建理工大学福建省智能加工技术及装备重点实验室,福州350118 [2]福建理工大学机械与汽车工程学院,福州350118

出　　处：《有色金属科学与工程》2025年第1期43-53,共11页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(51575110);福建省自然科学基金资助项目(2020J01872)。

摘　　要：为提高轻量化前提下选区激光熔化成型点阵结构力学性能,融入拱形特征进行点阵结构设计。综合考虑多结构参数的交互影响,利用响应面法建立了拱形高跨比、单胞杆径和胞元高度3个结构参数与点阵弹性模量及抗压强度的数学关系模型,分析了结构参数对点阵弹性模量与抗压强度的影响规律,获得较优的结构参数组合。结果表明,拱形高跨比对结构弹性模量与抗压强度的影响最显著,随着高跨比的增大,结构弹性模量与抗压强度显著提高。优化得出拱形点阵的较优结构参数组合为拱形高跨比0.7、单胞杆径1.2 mm、胞元高度4.5 mm,在此条件下其弹性模量为2.012 GPa,抗压强度为79.254 MPa,相比优化前弹性模量和抗压强度分别提升21.57%和35.60%,结构力学性能显著增强。本研究可为轻量化点阵结构的设计与优化提供参考。To enhance the mechanical properties of the lattice structure formed by selective laser melting under the premise of lightweight,the arch feature was incorporated into the lattice structure design.Considering the combined effects of various structural parameters,a mathematical relationship model of arch height-to-span ratio,strut diameter and cell height with lattice elastic modulus and compressive strength was established by response surface test.The impact of these structural parameters on the elastic modulus and compressive strength was analyzed and an optimal combination of parameters was determined.The findings reveal that the arch height-to-span ratio has the most significant influence on the elastic modulus and compressive strength of the structure.As the arch height-tospan ratio increases,both the elastic modulus and compressive strength of the structure demonstrate notable improvements.The optimal structural parameter combination of the arch lattice structure obtained by optimization is the arch height-to-span of 0.7,strut diameter of 1.2 mm and cell height of 4.5 mm.The corresponding elastic modulus is measured at 2.012 GPa,while the compressive strength reaches 79.254 MPa.These values represent a respective increase of 21.57% and 35.60% compared to the non-optimized configuration.The mechanical properties of the structure have been significantly enhanced.This research can provide references for the design and optimization of lightweight lattice structures.

关 键 词：选区激光熔化 结构参数 拱形点阵 弹性模量 抗压强度 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TN249[金属学及工艺—金属材料]