FCCZ点阵结构优化与力学性能分析

刘弘炜; 邱吉; 王宇; 李志强

doi:10.11858/gywlxb.20251044

FCCZ点阵结构优化与力学性能分析

doi: 10.11858/gywlxb.20251044

刘弘炜^1,,
邱吉^{1, 2, 3, 4},
王宇¹,
李志强^{1, 2, 3, 4,*, ,}

1.
太原理工大学航空航天学院, 山西太原　030024
2.
太原理工大学材料强度与结构冲击山西省重点实验室, 山西太原　030024
3.
太原理工大学山西省力学基础学科研究中心, 山西太原　030024
4.
太原理工大学力学国家级实验教学示范中心, 山西太原　030024

基金项目: 国家自然科学基金（12272255，12302477）

详细信息

作者简介:
刘弘炜（1996－），男，硕士研究生，主要从事冲击动力学研究. E-mail：liuhongwei20222022@163.com

通讯作者:
李志强（1973－），男，博士，教授，主要从事冲击动力学研究. E-mail：lizhiqiang@tyut.edu.cn

中图分类号: O341; O521.9
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- 文章访问数: 508
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出版历程
- 收稿日期: 2025-03-05
- 修回日期: 2025-04-10
- 录用日期: 2025-04-10
- 网络出版日期: 2025-04-11
- 刊出日期: 2025-09-05

Optimization and Mechanical Performance Analysis of FCCZ Lattice Structure

LIU Hongwei^1
,,
QIU Ji^{1, 2, 3, 4},
WANG Yu¹,
LI Zhiqiang^{1, 2, 3, 4,*
, ,}

1.
College of Aeronautics and Astronautics, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
2.
Shanxi Key Laboratory of Material Strength and Structural Impact, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
3.
Shanxi Research Center of Basic Discipline of Mechanics, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
4.
National Demonstration Center for Experimental Mechanics Education (Taiyuan University of Technology), Taiyuan 030024, Shanxi, China

摘要

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_0.3NbTi₃VZr_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。
- 点阵结构 /
- 轻量化设计 /
- 吸能特性 /
- 高熵合金 /
- 动态响应
Abstract: 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_0.3NbTi₃VZr_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 cross-section 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.
- lattice structures /
- lightweight design /
- energy absorption characteristics /
- high entropy alloy /
- dynamic response

HTML全文

图 1 动态加载实验装置示意图

Figure 1. Schematic diagram of dynamic loading experimental device

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图 2 Al_0.3NbTi₃VZr_1.5 HEA的动态应力-应变曲线

Figure 2. Dynamic stress-strain curves of Al_0.3NbTi₃VZr_1.5 HEA

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图 3 SHPB实验的数值模拟结果：(a) 应力云图，(b) 实验与数值模拟对比

Figure 3. Numerical simulation results of SHPB experiment: (a) stress contours;(b) comparison between experiment and numerical simulation

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图 4 FCCZ点阵结构模型及其单胞示意图

Figure 4. FCCZ lattice structure and its units

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图 5 6061-T6铝合金与Al_0.3NbTi₃VZr_1.5 HEA FCCZ点阵结构的动态响应

Figure 5. Dynamic responses of 6061-T6 aluminum alloy and FCCZ lattice structures of Al_0.3NbTi₃VZr_1.5 HEA

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图 6 FCCZ点阵结构的原始、边缘增强优化、中心开孔优化和变截面优化的三维模型

Figure 6. Three-dimensional models showing geometric parameters of the FCCZ lattice structure for original, edge-reinforced optimization, center-excavated optimization, and variable cross-section optimization

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图 7 FCCZ和BE优化结构的压缩响应对比：(a) 工程应力-应变曲线，(b) 屈服强度和平台应力

Figure 7. Comparison of compression response between FCCZ and BE optimization structures: (a) engineering stress-strain curves; (b) yield strength and plateau stress

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图 8 FCCZ和BC优化结构的压缩响应对比：(a) 工程应力-应变曲线，(b) 屈服强度和平台应力

Figure 8. Comparison of compression response between FCCZ and BC optimization structures: (a) engineering stress-strain curves; (b) yield strength and plateau stress

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图 9 FCCZ和BV优化结构的压缩响应对比：(a) 工程应力-应变曲线，(b) 屈服强度和平台应力

Figure 9. Comparison of compression response between FCCZ and BV optimization structures: (a) engineering stress-strain curves; (b) yield strength and plateau stress

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图 10 FCCZ和3类优化结构在应变为0、0.1和0.2时的von Mises应力分布

Figure 10. Von Mises stress distributions of FCCZ and three optimized configurations at strains of 0, 0.1, and 0.2

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图 11 FCCZ和3类优化结构的载荷-位移曲线对比

Figure 11. Comparison of load-displacement curves between FCCZ and three optimized configurations

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图 12 FCCZ和3类优化结构的吸能特性对比

Figure 12. Comparison of energy absorption characteristics among FCCZ and three optimized configurations

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