Enhanced interfacial joining strength of laser wobble joined 6061-T6 Al alloy/CFRTP joint via interfacial bionic textures pre-construction

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2023-07-15 DOI:10.1016/j.compositesb.2023.110787

Hengchang Bu , Xiang Li , Binbin Li , Xiaodong Li , Xiaohong Zhan

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引用次数: 3

Abstract

The joining of metals and carbon fiber reinforced thermoplastics composite (CFRTP) is recently considered to be an effective and promising way to meet the lightweight requirements of manufacturing in the aviation field. Herein, novel bionic textures (fishbone-like and nacre-like), constructed by laser pretreatment, are proposed to enhance the hybrid joints of 6061 Al alloy and CFRTP by the laser wobble joining method. The effects of the proposed bionic textures on the hybrid joints of 6061/CFRTP were uncovered through a systematic experimental method and finite element analysis (FEA). The results indicated that the strength and toughness of the hybrid joints with novel bionic textures were both distinctly improved compared with that of conventional textures (groove-like and circular-like). This strengthening effect can be essentially attributed to the buffering of interfacial stress concentration and the deflection behavior of cracks. The observed interfacial gaps and fractured resin appearance both distributed near the sides of the textures demonstrate that the cracks propagate inside the resin on one side of the texture and propagate along the interface on the other side. A new reinforcement strategy for hybrid metal/CFRTP joints has been proposed: regulating interfacial bionic textures to inhibit the initiation and propagation of interfacial cracks.

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界面仿生纹理预构提高6061-T6铝合金/CFRTP激光摆动连接接头的界面连接强度

近年来，金属与碳纤维增强热塑性复合材料(CFRTP)的结合被认为是满足航空制造轻量化要求的一种有效而有前途的方法。在此基础上，通过激光预处理构建鱼骨状和珍珠状仿生纹理，利用激光摆动连接法增强6061铝合金与CFRTP的混合接头。通过系统的实验方法和有限元分析，揭示了仿生肌理对6061/CFRTP复合关节的影响。结果表明，与传统纹理(槽状和圆形)相比，新型仿生纹理复合关节的强度和韧性均有明显提高。这种强化效果主要是由于界面应力集中的缓冲作用和裂纹的挠曲行为。观察到的界面间隙和断裂树脂形貌均分布在织构的两侧附近，表明裂纹在织构的一侧在树脂内部扩展，而在另一侧沿界面扩展。提出了一种新的金属/CFRTP复合接头增强策略:通过调节界面仿生织构来抑制界面裂纹的萌生和扩展。

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

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.