CF/PA6复合材料点阵结构的超声波焊接成形及其压缩试验研究

doi:10.3901/JME.260354

机械工程学报 ›› 2026, Vol. 62 ›› Issue (14): 106-114.doi: 10.3901/JME.260354

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CF/PA6复合材料点阵结构的超声波焊接成形及其压缩试验研究

邢誉^1,2,3, 张婷婷^1,2,3, 李刘凯^1,2,3, 崔银魁^1,2,3, 梁建国^1,2,3

1. 太原理工大学机械工程学院太原 030024;
2. 先进金属复合材料成形技术与装备教育部工程研究中心太原 030024;
3. 金属成形技术与重型装备全国重点实验室太原 030024

收稿日期:2025-06-16 修回日期:2025-10-15 发布日期:2026-08-29
作者简介:邢誉，男，2001年出生。主要研究方向为超声波焊接成形及失效机制。E-mail：xyu35821283@163.com;张婷婷(通信作者)，女，1988年出生，博士，教授，博士研究生导师。主要研究方向为复合材料先进连接技术及轻量化制造。E-mail：zhangtingting@tyut.edu.cn
基金资助:
国家自然科学基金资助项目(52275360)。

Ultrasonic Welding Forming and Compression Test Study of CF/PA6 Composite Lattice Structures

XING Yu^1,2,3, ZHANG Tingting^1,2,3, LI Liukai^1,2,3, CUI Yinkui^1,2,3, LIANG Jianguo^1,2,3

1. College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan 030024;
2. Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment, Ministry of Education, Taiyuan 030024;
3. National Key Laboratory of Metal Forming Technology and Heavy Equipment, Taiyuan 030024

Received:2025-06-16 Revised:2025-10-15 Published:2026-08-29

摘要/Abstract

摘要： 碳纤维复合材料点阵结构的成形制造长期依赖于胶粘与模压一体化成形工艺。然而，胶粘连接易受环境因素影响，模压成形过程则易引入较大的残余应力，从而降低结构的疲劳寿命。针对上述问题提出一种基于短切碳纤维增强尼龙6(CF/PA6)复合材料的碳纤维点阵结构超声波焊接成形新工艺。首先，依托自主搭建的超声波焊接平台，成功制备了1×1和2×2金字塔点阵结构。随后，开展准静态压缩实验，并结合数字图像相关(Digital image correlation，DIC)技术及有限元力学建模，深入分析其压缩失效机制。研究结果表明，1×1整体式点阵结构的承载性能明显优于分离式结构，2×2结构的承载能力随规模扩大呈非线性提升，最大可达16 560.9 N。该类结构的平面压缩失效模式不同于传统胶接结构的界面脱粘或模压结构的节点断裂，主要表现为非焊点主导的杆件屈曲断裂，焊接接头展现出良好的力学性能。

关键词: 碳纤维增强复合材料, 点阵结构, 超声波焊接, 压缩失效机制, 轻量化设计

Abstract: The forming and manufacturing of carbon fiber composite lattice structures have long relied on adhesive bonding and compression integrated molding processes. However, adhesive bonding is easily affected by environmental factors, and large residual stress is often introduced during compression molding, thus reducing the fatigue life of the structures. To address the above problems, a new ultrasonic welding forming process for carbon fiber lattice structures based on short carbon fiber reinforced nylon 6(CF/PA6) composites is proposed. First, 1×1 and 2×2 pyramidal lattice structures are successfully fabricated by using a self-built ultrasonic welding platform. Then, quasi-static compression experiments are carried out, and the compression failure mechanism is thoroughly analyzed by combining digital image correlation(DIC) technology and finite element mechanical modeling. The research results show that the load-bearing performance of the 1×1 integral lattice structure is significantly better than that of the separated structure, and the load-bearing capacity of the 2×2 structure increases nonlinearly with scale expansion, which can reach up to 16 560.9 N. The flat compression failure mode of this type of structure is different from the interface debonding of traditional adhesive structures or the node fracture of compression molded structures. It is mainly manifested as non-weld point dominated buckling fracture of members, and the welded joints show good mechanical properties.

Key words: carbon fiber reinforced composites, lattice structures, ultrasonic welding, compression failure mechanism, lightweight design

中图分类号:

TG453

邢誉, 张婷婷, 李刘凯, 崔银魁, 梁建国. CF/PA6复合材料点阵结构的超声波焊接成形及其压缩试验研究[J]. 机械工程学报, 2026, 62(14): 106-114.

XING Yu, ZHANG Tingting, LI Liukai, CUI Yinkui, LIANG Jianguo. Ultrasonic Welding Forming and Compression Test Study of CF/PA6 Composite Lattice Structures[J]. Journal of Mechanical Engineering, 2026, 62(14): 106-114.

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CF/PA6复合材料点阵结构的超声波焊接成形及其压缩试验研究

Ultrasonic Welding Forming and Compression Test Study of CF/PA6 Composite Lattice Structures

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