海洋老化对结构粘合剂机械性能的影响

IF 2.1 4区 材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING
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引用次数: 0

摘要

摘要 这项工作的目的是研究结构粘合剂在海洋环境等侵蚀性环境中的行为。为此,在海洋环境条件下进行了老化程序,并对老化前后的特性进行了比较。这一点尤为重要,因为粘合剂的特性会受到温度和湿度等因素的严重影响。为了评估材料的机械性能,我们进行了大量拉伸试验,还采用了数字图像相关技术(DIC)来获取泊松比或杨氏模量等参数。此外,还进行了动态机械分析(DMA),在此基础上应用时间-温度叠加原理(TTS)对粘合剂的行为进行长期预测,通过频率测试构建动态载荷的主曲线,通过蠕变测试构建持续载荷的主曲线。老化过程导致材料强度降低,但也使其更具延展性和柔韧性,而通过频率扫描获得的主曲线显示,老化材料对频率的依赖性较小,通过蠕变试验获得的主曲线显示,老化材料和未老化材料的行为相似。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The effect of marine ageing on the mechanical properties of a structural adhesive

Abstract

The aim of this work is to study the behaviour of a structural adhesive in an aggressive setting such as the marine environment. For this purpose, an ageing procedure is carried out under marine environmental conditions and a comparison of the properties before and after the process is performed. This is especially important as the characteristics of an adhesive can be heavily affected by factors such as temperature and humidity. For the assessment of the mechanical properties of the material bulk tensile tests are conducted, digital image correlation (DIC) is also employed to obtain parameters such as Poisson’s ratio or Young’s modulus. A dynamic mechanical analysis (DMA) is also carried out, on which the time-temperature superposition principle (TTS) is applied to make a long-term prediction of the behaviour of the adhesive, constructing the master curves for dynamic loads by means of a frequency test and for sustained loads through a creep test. This ageing procedure has led to a reduction in the strength of the material, but has also made it more ductile and flexible, while the master curve obtained from the frequency sweeps shows a smaller dependence of frequency in the aged material and the master curve obtained from the creep tests shows a similar behaviour for both the aged and unaged material.

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来源期刊
Mechanics of Time-Dependent Materials
Mechanics of Time-Dependent Materials 工程技术-材料科学:表征与测试
CiteScore
4.90
自引率
8.00%
发文量
47
审稿时长
>12 weeks
期刊介绍: Mechanics of Time-Dependent Materials accepts contributions dealing with the time-dependent mechanical properties of solid polymers, metals, ceramics, concrete, wood, or their composites. It is recognized that certain materials can be in the melt state as function of temperature and/or pressure. Contributions concerned with fundamental issues relating to processing and melt-to-solid transition behaviour are welcome, as are contributions addressing time-dependent failure and fracture phenomena. Manuscripts addressing environmental issues will be considered if they relate to time-dependent mechanical properties. The journal promotes the transfer of knowledge between various disciplines that deal with the properties of time-dependent solid materials but approach these from different angles. Among these disciplines are: Mechanical Engineering, Aerospace Engineering, Chemical Engineering, Rheology, Materials Science, Polymer Physics, Design, and others.
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