Study on the Mechanical Behavior of Multilayer Size-Graded Face Center Cubic Lattice Structures

ZHANG Wukun; TAN Yonghua; GAO Yushan; WANG Jun; ZHAO Jian

doi:10.7652/xjtuxb202311003

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Study on the Mechanical Behavior of Multilayer Size-Graded Face Center Cubic Lattice Structures

更新时间：2025-12-08

- Study on the Mechanical Behavior of Multilayer Size-Graded Face Center Cubic Lattice Structures
- Vol. 57, Issue 11, Pages: 21-30(2023)
- 作者机构：
  
  1. 西安航天动力研究所液体火箭发动机技术重点实验室,西安,710100
  2. 航天推进技术研究院,西安,710100
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202311003
  CLC： V414.9
- Online First：10 November 2023，
  
  Published：2023
- 稿件说明：
移动端阅览
ZHANG Wukun, TAN Yonghua, GAO Yushan, et al. Study on the Mechanical Behavior of Multilayer Size-Graded Face Center Cubic Lattice Structures[J]. 2023, 57(11): 21-30.
DOI：

ZHANG Wukun, TAN Yonghua, GAO Yushan, et al. Study on the Mechanical Behavior of Multilayer Size-Graded Face Center Cubic Lattice Structures[J]. 2023, 57(11): 21-30. DOI： 10.7652/xjtuxb202311003.

摘要

针对均匀点阵结构能量吸收性能低和截面梯度点阵结构刚度性能较差的问题

设计了多层尺寸梯度面心立方点阵结构

通过理论、仿真和试验方法研究了其力学性能。首先

采用SS316L不锈钢材料和选择性激光熔融(SLM)技术

制备了胞元尺寸梯度面心立方(SG-FCC)和均匀面心立方(U-FCC)两种点阵结构的试验件

并进行了准静态压缩试验; 然后

在试验和有限元分析的基础上

获得了两种点阵结构在压缩过程的力学行为

基于杆梁变形理论和多层梯度点阵结构刚度组集方法

提出了两种点阵结构的等效弹性模量理论模型; 最后

研究了不同梯度因子对SG-FCC点阵结构压缩性能的影响规律。试验结果表明:相比于U-FCC点阵结构

SG-FCC点阵结构的力学性能更加优异

其刚度和比刚度分别增长了17.8%和16.2%

吸能量和比吸能量分别提高了10.8%和10.36%。所提出的SG-FCC点阵结构弹性模量理论模型与试验和有限元分析结果相比吻合较好

误差小于10%

可用于SG-FCC点阵结构的刚度预测; 当梯度因子为1.5时

SG-FCC点阵结构的刚度性能较好; 当梯度因子为3时

SG-FCC点阵结构的吸能性能较好。该研究可为集高刚度和大吸能性能的轻质化结构设计和工程应用提供参考。

Abstract

This paper aims to address the low energy absorption performance of uniform lattice structures and the poor stiffness performance of cross-section gradient lattice structures. To this end

a multilayer size gradient FCC lattice structure was designed and its mechanical properties were investigated through theoretical

numerical

and experimental methods. Firstly

size-graded face center cubic(SG-FCC)and uniform face center cubic(U-FCC)lattice structures were fabricated using the SS316L stainless steel and selective laser melting(SLM)technology. The quasi-static compression tests were also carried out. Then the mechanical properties of the two lattice structures during compression were obtained from the tests and finite element analysis results. In addition

the equivalent elastic modulus analytical models were proposed for both lattice structures based on the deformation theory of beams and the stiffness set method of gradient lattice structures. Finally

the study explored the influence of different gradient factors on the compressive performance of the SG-FCC lattice structures. The results showed that the mechanical properties of the SG-FCC lattice were superior to those of the U-FCC lattice. Specifically

the stiffness and specific stiffness of the SG-FCC lattice increased by 17.8% and 16.2% respectively

and the absorption energy and specific absorption energy increased by 10.8% and 10.36% respectively. Furthermore

the theoretical elastic modulus model of SG-FCC lattices was in good agreement with the experimental and finite element results. The prediction error was less than 10%

which could be used to predict the stiffness of the SG-FCC lattice structure. When the gradient factor was 1.5

the stiffness properties of the SG-FCC lattice structure were better than those of other gradient factors. When the gradient factor was 3

the energy absorption properties of the SG-FCC lattice structure were better than those of other gradient factors. The research findings offer guidance for the design and engineering application of lightweight structures with high stiffness and high energy absorption performance.

关键词

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