Strength Verification of a Carbon-fibre-reinforced Plastic Patch Used to Repair a Cracked Aluminium Alloy Plate

IF 2.3 4区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES

Applied Composite Materials Pub Date : 2023-11-11 DOI:10.1007/s10443-023-10173-1

Guang-Min Luo, Chi-Hong Liang

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Abstract

Aluminium alloy is a commonly used material in the superstructure of naval vessels. This alloy is prone to sensitisation when exposed to the marine environment for an extended period, which leads to the formation of stress corrosion cracks. Because welding is unsuitable for repairing sensitised aluminium alloy with cracks, this study used carbon-fibre-reinforced plastic (CFRP) patches for repair. The repair effect of CFRP patches was examined through experiments and numerical simulation to clarify the mechanical properties of cracked aluminium alloy repaired with CFRP patches. The experimental results revealed that the tensile strength of cracked aluminium alloy was increased by 40% after its repair with a CFRP patch, and the obtained tensile strength was higher than the yielding strength of this alloy. With regard to numerical simulation, this study employed the extended finite-element method (XFEM) and traction-separation law to simulate crack propagation in cracked aluminium alloy and the bonding strength at the repair interface. The numerical simulation results were consistent with the experimental results, which confirmed that the established numerical model accurately captures the failure trends and ultimate strength of cracked aluminium alloy repaired with a CFRP patch. Future researchers can use the numerical simulation method established in this study to predict the effectiveness of using CFRP patches in the repair of naval vessel superstructures.

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用于修复破裂铝合金板的碳纤维增强塑料补丁的强度验证

铝合金是海军舰艇上层建筑的常用材料。这种合金长期暴露在海洋环境中容易敏化，从而形成应力腐蚀裂纹。由于焊接不适合修复出现裂纹的敏化铝合金，因此本研究采用碳纤维增强塑料（CFRP）修补剂进行修复。通过实验和数值模拟研究了碳纤维增强塑料贴片的修复效果，以明确用碳纤维增强塑料贴片修复的裂纹铝合金的机械性能。实验结果表明，使用 CFRP 补丁修复后，裂纹铝合金的抗拉强度提高了 40%，获得的抗拉强度高于该合金的屈服强度。在数值模拟方面，本研究采用了扩展有限元法（XFEM）和牵引分离定律来模拟开裂铝合金的裂纹扩展和修复界面的粘结强度。数值模拟结果与实验结果一致，证实了所建立的数值模型准确地捕捉到了用 CFRP 补丁修复的开裂铝合金的失效趋势和极限强度。未来的研究人员可利用本研究建立的数值模拟方法，预测使用 CFRP 补丁修复舰船上层建筑的效果。

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

Applied Composite Materials 工程技术-材料科学：复合

CiteScore

4.20

自引率

4.30%

发文量

审稿时长

1.6 months

期刊介绍： Applied Composite Materials is an international journal dedicated to the publication of original full-length papers, review articles and short communications of the highest quality that advance the development and application of engineering composite materials. Its articles identify problems that limit the performance and reliability of the composite material and composite part; and propose solutions that lead to innovation in design and the successful exploitation and commercialization of composite materials across the widest spectrum of engineering uses. The main focus is on the quantitative descriptions of material systems and processing routes. Coverage includes management of time-dependent changes in microscopic and macroscopic structure and its exploitation from the material''s conception through to its eventual obsolescence.