摘要
针对航空航天等领域对高性能材料的迫切需求,探讨了一种新型高熵合金Al_(0.3)NbTi_(3)VZr_(1.5)结合点阵结构的动态压缩行为及吸能特性。为解决传统Z向杆件面心晶胞(face centered cubic unit cell with Z-struts,FCCZ)点阵结构在复杂载荷条件下力学性能不足的问题,对FCCZ点阵结构进行了几何优化设计,并结合有限元分析方法系统研究了其力学响应。结果表明:优化后的斜杆交叉支点孔洞(BC)型和变截面斜杆(BV)型点阵结构显著改善了材料的应力分布,提升了比强度和吸能特性。优化构型中,BV1型的比强度较原结构提高了31%;BC2型的比吸能增加了9%,综合性能最优。此外,孔径和变截面圆角对结构优化有显著的敏感性。研究成果为高熵合金与点阵结构的高效结合提供了理论依据和设计参考,可为航空航天、汽车制造等领域中轻量化结构的优化设计提供指导。
This study addresses the urgent demand for high-performance materials in aerospace and other fields,exploring the dynamic compression behavior and energy absorption characteristics of a new high entropy alloy(HEA)Al_(0.3)NbTi_(3)VZr_(1.5) combined with optimized lattice structures.To solve the problem of insufficient performance of traditional face centered cubic unit cell with Z-struts(FCCZ)lattice structures under complex load conditions,a geometric optimization design was conducted based on finite element analysis.The mechanical response of the structure was then systematically investigated.The results indicate that the optimized BC and BV lattice structures significantly enhance stress distribution,specific strength,and energy absorption characteristics of the material.In the optimized configuration,the BC2 type exhibits a 9%increase in specific energy absorption,demonstrating the best overall performance.Meanwhile,the BV1 type shows a 31%improvement in specific strength compared to the original structure.Additionally,the optimization design demonstrates significant sensitivity to two key parameters:aperture and variable crosssection fillet.These findings provide a theoretical basis and design reference for efficiently combining HEA with lattice structures,offering important guidance for the design and optimization of lightweight structures in aerospace,automotive manufacturing,and other fields.
作者
刘弘炜
邱吉
王宇
李志强
LIU Hongwei;QIU Ji;WANG Yu;LI Zhiqiang(College of Aeronautics and Astronautics,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;Shanxi Key Laboratory of Material Strength and Structural Impact,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;Shanxi Research Center of Basic Discipline of Mechanics,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;National Demonstration Center for Experimental Mechanics Education(Taiyuan University of Technology),Taiyuan 030024,Shanxi,China)
出处
《高压物理学报》
北大核心
2025年第9期101-110,共10页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金(12272255,12302477)。
关键词
点阵结构
轻量化设计
吸能特性
高熵合金
动态响应
lattice structures
lightweight design
energy absorption characteristics
high entropy alloy
dynamic response
