盐雾环境下CFZnL复合材料时效行为的实验与数值研究

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-01 DOI:10.1016/j.tws.2025.113225

Jingang Huang , Yutong Liu , Yuliang Hou , Kang Yang , Jianwei Shi , Liang Meng , Thaneshan Sapanathan

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引用次数: 0

摘要

研制了一种新型碳纤维-锌合金层压复合材料，并对其盐雾时效后的模量进行了研究。对CFZnL复合材料和常规CFRP复合材料分别进行了盐雾老化和拉伸试验，以评估其老化行为和残余拉伸模量。结果表明，锌合金层的吸湿性显著提高了材料的抗老化性能。此外，提出了一种多尺度建模方法来预测CFZnL和CFRP复合材料的老化行为和模量。建立了微尺度模型，得到了CFRP层的有效扩散系数和有效性能。此外，采用指数退化模型计算了CFRP和Zn合金层的残余性能。然后，将它们引入到拉伸模拟的宏观模型中。数值结果与实验结果吻合较好，验证了多尺度模拟方法的准确性。结果表明，双面锌合金层的CFZnL复合材料在盐雾环境下具有较好的耐老化性能。最后，通过实验观察分析了老化CFRP和CFZnL复合材料的损伤机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Experimental and numerical investigation on the aging behavior of CFZnL composites in salt spray environment

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Experimental and numerical investigation on the aging behavior of CFZnL composites in salt spray environment

This study develops a class of novel carbon-fiber-Zinc-alloy-laminated (CFZnL) composites, and investigates the modulus after salt spray aging. Experimental salt spray aging and tensile tests have been sequentially performed on CFZnL composites and conventional CFRP composites, to assess the aging behavior and residual tensile modulus. It has been observed that Zn alloy layer significantly enhances the aging-resistance due to moisture absorption. In addition, a multiscale modeling approach is proposed to predict the aging behavior and moduli of CFZnL and CFRP composites. Microscale models have been established to obtain the effective diffusion coefficients and effective properties of CFRP layers. Moreover, residual properties of CFRP and Zn alloy layers are calculated using an exponential degradation model. Then, they are introduced in the macroscale model for the tensile simulation. The numerical results concur well with the experimental ones, validating the accuracy of the multiscale modeling approach. It indicates that CFZnL composites with double-side Zn alloy layers possess superior aging-resistance than others in salt spray environment. Finally, the damage mechanisms are analyzed for the aged CFRP and CFZnL composites via experimental observations.

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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.