Effect of prolonged isothermal exposure and thermal cycling on mechanical properties and shape recovery behavior of shape memory polymer composites

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-04-06 DOI:10.1016/j.compositesa.2025.108921

Chengjun Zeng , Zhengxian Liu , Liwu Liu , Wei Zhao , Xiaozhou Xin , Yanju Liu , Jinsong Leng

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引用次数: 0

Abstract

This study investigated the thermal environmental durability of carbon fiber reinforced epoxy-based shape memory polymer composites (SMPCs) under isothermally elevated/cryogenic temperatures and thermal cycling. The mechanical properties and shape memory behavior of the SMPCs were evaluated through quasi-static tensile tests, cyclic tensile tests, and shape recovery experiments. Findings indicated some variations in mechanical properties during environmental exposure. Isothermal low-temperature exposure enhanced mechanical properties, while thermal cycling significantly reduced them due to residual thermal stresses at the fiber/matrix interface. Cyclic tensile tests showed that thermal exposure influenced cyclic mechanical properties, including cyclic life, hysteresis loop evolution, and modulus degradation. Despite these changes, the shape memory performance remained largely unaffected by prolonged isothermal exposure or thermal cycling, exhibiting only a slight delay in shape recovery response and a minor reduction in shape recovery rate (<4%).

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长时间等温暴露和热循环对形状记忆聚合物复合材料力学性能和形状恢复行为的影响

研究了碳纤维增强环氧基形状记忆聚合物复合材料（SMPCs）在等温高温/低温和热循环条件下的热环境耐久性。通过准静态拉伸试验、循环拉伸试验和形状恢复试验对smpc的力学性能和形状记忆行为进行了评价。研究结果表明，在环境暴露过程中，机械性能会发生一些变化。等温低温暴露增强了材料的力学性能，而热循环由于纤维/基体界面的残余热应力而显著降低了材料的力学性能。循环拉伸试验表明，热暴露会影响循环力学性能，包括循环寿命、滞后回路演变和模量退化。尽管有这些变化，但形状记忆性能在很大程度上不受长时间等温暴露或热循环的影响，仅表现出形状恢复响应的轻微延迟和形状恢复速率的轻微降低（<4%）。

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 A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.