Enhancing interfacial adhesion of induction welded CF/PA66 joints via fabricating a hierarchical micro-nano porous structure on heating element

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-09-07 DOI:10.1016/j.tws.2025.113940

Tenghui He , Jianhui Su , Xueyan Zhang , Fuyun Liu , Xiaohui Han , Jin Yang , Yunhua Deng , Bo Chen , Xiaoguo Song , Caiwang Tan

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引用次数: 0

Abstract

The development of efficient and reliable bonding techniques for thermoplastic composites was crucial for lightweight and high-performance structural applications in industries such as automotive and aerospace. This study investigated the use of aluminum mesh as a heating element (HE) for the induction welding of thermoplastic composites, aiming to produce lightweight and high-strength joints. A hierarchical micro-nano porous structure was developed on the HE surfaces via an anodization and acid etching (AAE) treatment to enhance the interfacial adhesion between the HE and resin matrix. The results showed that the hierarchical micro-nano porous structure significantly increased HE surface roughness and hydroxyl adsorption, improving wettability and promoting mechanical interlocking between HE and the resin matrix during welding. Interface analysis further demonstrated that this micro-nano structure also facilitated stronger Al-O-C bond interactions between HE and resin matrix. As a result, under the synergistic effect of mechanical interlocking and chemical bonding at the HE/PA66 interface, the lap shear strength (LSS) of the AAE-treated joints increased by 45.5 %, reaching 16.06 MPa. Digital image correlation (DIC) technique analysis revealed that the hierarchical micro-nano porous structure effectively alleviated strain concentration at the weld seam. Overall, the introduction of the hierarchical micro-nano porous structure on the HE surfaces significantly improved weld seam uniformity and joint strength, providing an innovative solution for the efficient and reliable joining of thermoplastic composites.

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在加热元件上制备微纳层次化多孔结构提高CF/PA66感应焊接接头的界面附着力

开发高效可靠的热塑性复合材料粘接技术对于汽车和航空航天等行业的轻量化和高性能结构应用至关重要。本研究利用铝网作为加热元件（HE）进行热塑性复合材料的感应焊接，旨在生产轻量化和高强度的接头。通过阳极氧化和酸蚀（AAE）处理，在HE表面形成层次微纳多孔结构，以增强HE与树脂基体之间的界面附着力。结果表明，分层微纳多孔结构显著提高了HE表面粗糙度和羟基吸附，改善了HE的润湿性，促进了HE与树脂基体在焊接过程中的机械联锁。界面分析进一步表明，这种微纳结构也促进了HE与树脂基体之间更强的Al-O-C键相互作用。结果表明，在HE/PA66界面机械联锁和化学结合的协同作用下，aae处理接头的搭接抗剪强度（LSS）提高了45.5%，达到16.06 MPa。数字图像相关（DIC）技术分析表明，分层微纳多孔结构有效地缓解了焊缝应变集中。总体而言，在HE表面引入分层微纳多孔结构显著改善了焊缝均匀性和接头强度，为热塑性复合材料的高效可靠连接提供了创新的解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.