东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (3): 69-79.DOI: 10.12068/j.issn.1005-3026.2025.20230274

• 机械工程 • 上一篇    下一篇

三角函数密度梯度蒙皮点阵结构设计及力学性能

郝博1,2, 赵玉欣2(), 徐新岩2   

  1. 1.东北大学 航空动力装备振动及控制教育部重点实验室,辽宁 沈阳 110819
    2.东北大学秦皇岛分校 控制工程学院,河北 秦皇岛 066004
  • 收稿日期:2023-09-25 出版日期:2025-03-15 发布日期:2025-05-29
  • 通讯作者: 赵玉欣
  • 作者简介:郝 博(1963—),男,辽宁沈阳人,东北大学教授,博士生导师.
  • 基金资助:
    装备预研领域基金快速扶持项目(80923020104)

Design and Mechanical Performance of Triangular Function Density Gradient Skin Lattice Structures

Bo HAO1,2, Yu-xin ZHAO2(), Xin-yan XU2   

  1. 1.Key Laboratory of Vibration and Control of Aero-Propulsion System,Ministry of Education,Northeastern Universtiy,Shenyang 110819,China
    2.School of Control Engineering,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China.
  • Received:2023-09-25 Online:2025-03-15 Published:2025-05-29
  • Contact: Yu-xin ZHAO

摘要:

基于螺旋 (gyroid)型的3周期最小曲面(TPMS),针对目前研究中梯度点阵结构梯度变化规律较为单一的问题,提出了正弦函数平方和余弦函数平方密度梯度蒙皮点阵结构,并采用选择性激光熔化(SLM)技术制备了钛合金(Ti-6Al-4V)样件.为研究其力学性能对样件进行了有限元分析和压缩实验,二者结果误差小于6.3%.以传统线性密度梯度蒙皮点阵结构为对照,将3种结构的力学性能、变形行为及能量吸收特性进行了对比分析.结果发现,3种结构中,余弦函数平方蒙皮点阵结构承载性能最好,正弦函数平方蒙皮点阵结构能量吸收能力最强.通过优化蒙皮点阵结构内部相对密度分布,可以提高其力学性能和能量吸收能力.

关键词: 螺旋型, 3周期最小曲面, 密度梯度, 蒙皮点阵结构, 压缩实验

Abstract:

Based on the gyroid three period minimum surface (TPMS), a sine function square and cosine function square density gradient skin lattice structure was proposed to address the problem of a relatively single gradient variation law in gradient lattice structures in current research. Titanium alloy (Ti-6Al-4V) sample was prepared using selective laser melting (SLM) technology. Finite element analysis and compression experiments were conducted on the sample to study its mechanical properties, and the error between the two results was less than 6.3%. Compared with the traditional linear density gradient skin lattice structures, the mechanical properties, deformation behavior, and energy absorption characteristics of the three structures were compared and analyzed. It was found that among the three structures, the cosine function square skin lattice structure had the best load-bearing performance, while the sine function square skin lattice structure had the strongest energy absorption capacity. By optimizing the internal relative density of the skin lattice structure, its mechanical properties and energy absorption capacity can be improved.

Key words: gyroid, three period minimum surface, density gradient, skin lattice structure, compression experiment

中图分类号: