Towards ultra-fast and high strength structural repair of damaged thermoplastic composites: Ultrasonic welding

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-03-08 DOI:10.1016/j.compositesb.2025.112385

Tian Zhao , Shuaiheng Xu , Yu Feng , Chenqian Zhang , Yixing Huang , Xianben Ren , Ying Li

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Abstract

Owing to its high weld strength, rapid processing cycles and absence of foreign materials at the weldline, ultrasonic welding is considered as a promising technique for joining thermoplastic composites, as an alternative to traditional mechanical fastening and adhesive bonding. More importantly, this technique provides a potential possibility for repairing damaged composite structures with an extremely short duration. This paper presents a preliminary study on the feasibility of repairing an open-hole thermoplastic composite structure by using an external patch ultrasonically welded with different time durations. Both tensile and flexural behaviors of the repaired composite specimens were investigated. The damage processes of different specimens were synchronously characterized by using acoustic emission and digital image correlation techniques. Both the experimental and numerical results demonstrated a significant improvement in the mechanical performance of the weld-repaired specimens compared to the unrepaired ones. Additionally, the weld-repair patch effectively reduced the stress concentration in the periphery of the damaged area.

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超声波焊接具有焊接强度高、加工周期短、焊缝无异物等优点，被认为是一种很有前途的热塑性复合材料连接技术，可替代传统的机械紧固和粘合剂粘接。更重要的是，这种技术为在极短的时间内修复受损的复合材料结构提供了潜在的可能性。本文初步研究了使用不同持续时间的超声波焊接外部补丁修复开孔热塑性复合材料结构的可行性。研究了修复后的复合材料试样的拉伸和弯曲行为。利用声发射和数字图像相关技术对不同试样的损伤过程进行了同步表征。实验和数值结果都表明，与未修理的试样相比，焊接修复试样的机械性能有了显著改善。此外，焊接修复补丁还有效降低了受损区域外围的应力集中。

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.