水热老化条件下 CFRP 螺栓连接拉伸行为的实验研究

IF 3.2 3区 化学 Q2 POLYMER SCIENCE
e-Polymers Pub Date : 2024-04-13 DOI:10.1515/epoly-2023-0183
Hui Chen, Mingjie Li, Zhao Shen, Yitao Zhang, Youhua Zhu, Ye Wu
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引用次数: 0

摘要

碳纤维增强聚合物复合材料(CFRP)借助螺栓连接组装出复杂的结构,被广泛应用于各个领域。然而,螺栓连接处孔周围的应力集中会导致承载能力下降。在复杂的水热环境下,复合材料往往会发生机械退化。因此,为了研究水热老化条件下 CFRP 螺栓连接件的拉伸行为,需要仔细进行拉伸试验。根据反应历史、应变轮廓和破坏形态,研究了老化时间和温度对拉伸强度的影响。通过数字图像相关技术揭示了失效机理。最后,实验结果表明,在水热老化过程中,结构的承载能力明显下降。与未老化试样相比,在 25°C 和 65°C 下老化 6 周的试样峰值力分别降低了 22.79% 和 35.63%。在未老化和老化两种情况下,CFRP 单螺栓单搭接接头的拉伸试验都出现了相同的承载失效。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental investigation on tensile behavior of CFRP bolted joints subjected to hydrothermal aging
With the help of bolted joints to assemble a complex structure, carbon fiber reinforced polymer composite (CFRP) is widely used in various fields. However, stress concentration around holes at the bolted joints leads to a decrease in bearing capacity. Composites often result in mechanical degradation subjected to a complex hydrothermal environment. Therefore, to study the tensile behavior of CFRP bolted joints subjected to hydrothermal aging, the tensile tests are conducted carefully. The influence of aging time and temperature on tensile strength is investigated based on the response history, strain contour, and failure morphology. The failure mechanism is revealed via digital image correlation technology. Finally, the experimental results demonstrate that the bearing capacity of the structure in hydrothermal aging decreases significantly. Compared with the unaged specimens, the peak force of the specimens aged for 6 weeks at 25°C and 65°C is reduced by 22.79% and 35.63%, respectively. Under both the unaged and aged, the same bearing failure is found in the tensile tests of CFRP single-bolt single-lap joints.
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来源期刊
e-Polymers
e-Polymers 化学-高分子科学
CiteScore
5.90
自引率
10.80%
发文量
64
审稿时长
6.4 months
期刊介绍: e-Polymers is a strictly peer-reviewed scientific journal. The aim of e-Polymers is to publish pure and applied polymer-science-related original research articles, reviews, and feature articles. It includes synthetic methodologies, characterization, and processing techniques for polymer materials. Reports on interdisciplinary polymer science and on applications of polymers in all areas are welcome. The present Editors-in-Chief would like to thank the authors, the reviewers, the editorial staff, the advisory board, and the supporting organization that made e-Polymers a successful and sustainable scientific journal of the polymer community. The Editors of e-Polymers feel very much engaged to provide best publishing services at the highest possible level.
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