Influence of hydrothermal aging on the mechanical performance of foam core sandwich panels subjected to low-velocity impact

IF 1.9 4区材料科学 Q3 Materials Science

Science and Engineering of Composite Materials Pub Date : 2022-01-01 DOI:10.1515/secm-2022-0003

Youping Liu, Ye Wu

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引用次数: 1

Abstract

Abstract The effect of hydrothermal aging on the impact resistance of foam core sandwich panels is studied in this study. The sandwich panels with glass fiber-reinforced skins and polyurethane foam core were fabricated and then were treated with different hydrothermal aging conditions. The moisture absorption characteristic of the composite skins was evaluated. A modified Fickian formulation was proposed to predict the moisture absorption behavior of composite skins. The low-velocity impact resistance of the aged sandwich panels was determined at three different impact energies. The impact responses including contact force, deflection, and dissipated energy of the sandwich panels with and without hydrothermal aging were analyzed. The macroscopic and microscopic damage morphologies were observed by visual inspection and scanning electron microscope methods, respectively. The damage mechanism of the aged panels was revealed. Results indicate that the impact resistance of aged sandwich panels is degraded, and the performance degradation is larger with increasing aging temperature. Compared to the panel without hydrothermal aging, the reduction of the contact force is 35.69%, and the increase of the deflection is 71.43% for the aged panel at 70°C aging temperature. The fiber/matrix interfacial cohesive performance is degraded resulting from the hydrothermal aging.

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水热老化对泡沫芯芯夹芯板低速冲击力学性能的影响

摘要本文研究了水热老化对泡沫芯芯夹芯板抗冲击性能的影响。制备了玻璃纤维增强外皮和聚氨酯泡沫芯夹芯板，并对夹芯板进行了不同的水热老化处理。对复合材料表皮的吸湿性能进行了评价。提出了一种改进的Fickian公式来预测复合材料皮肤的吸湿性能。在三种不同的冲击能量下，测定了老化夹层板的低速抗冲击性能。分析了热液老化前后夹层板的接触力、挠度和耗散能等冲击响应。通过目测和扫描电镜分别观察损伤的宏观和微观形态。揭示了老化板的损伤机理。结果表明，老化夹层板的抗冲击性能下降，且随着老化温度的升高，性能下降幅度更大。在70℃时效温度下，与未经热液时效的面板相比，时效面板的接触力降低了35.69%，挠度增加了71.43%。水热老化导致纤维/基体界面粘结性能下降。

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

Science and Engineering of Composite Materials 工程技术-材料科学：复合

CiteScore

3.10

自引率

5.30%

发文量

审稿时长

4 months

期刊介绍： Science and Engineering of Composite Materials is a quarterly publication which provides a forum for discussion of all aspects related to the structure and performance under simulated and actual service conditions of composites. The publication covers a variety of subjects, such as macro and micro and nano structure of materials, their mechanics and nanomechanics, the interphase, physical and chemical aging, fatigue, environmental interactions, and process modeling. The interdisciplinary character of the subject as well as the possible development and use of composites for novel and specific applications receives special attention.