摘要
点阵结构因具有轻质、高孔隙率、高比强度、高能量吸收率等一系列优良力学特性以及减振、吸声、散热等特殊性能而备受关注。在增材制造飞速发展的背景下,点阵结构的不规则设计及可实现性迎来了新的发展期。应用Voronoi原理,利用参数化设计平台Grasshopper设计并构建了种子数分别为10,15,20的三种不规则点阵结构;通过LS-DYNA显式动力学程序进行有限元分析,模拟其压缩过程;对比三种不规则点阵结构的应力、应变及压缩过程中的能量吸收情况,分析其力学性能。仿真分析结果表明,种子数对不规则点阵结构的力学性能有重要影响,在一定限度内,提升种子数可以提高不规则点阵结构的力学性能。
Lattice structure has attracted much attention because of its excellent mechanical properties such as light weight,high porosity,high specific strength,high energy absorption,and special properties such as shock absorption,sound absorption and heat dissipation.With the rapid development of additive manufacturing industry,the irregular design and realizability of lattice structure have ushered in a new period of development.Using Voronoi principle and parametric design platform Grasshopper,three kinds of irregular lattice structures with seed numbers of 10,15 and 20 are designed and constructed.The compression process is simulated by finite element analysis using LS-DYNA explicit dynamics program.The mechanical properties of the three irregular lattice structures are analyzed by comparing the stress,strain and energy absorption during compression.The simulation results show that the number of seeds has an important effect on the mechanical properties of the irregular lattice structure.Within a certain limit,increasing the number of seeds can improve the mechanical properties of the irregular lattice structure.
作者
郝博
朱枳名
张鹏
Hao Bo;Zhu Zhiming;Zhang Peng
出处
《工具技术》
北大核心
2024年第9期103-108,共6页
Tool Engineering
基金
装备预研领域基金快速扶持项目(80923020104)。
作者简介
第一作者:郝博,教授,东北大学机械工程与自动化学院,110819沈阳市。
