Free vibration behaviour and some mechanical properties of micro particle reinforced epoxy composites

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-07-11 DOI:10.1515/ipp-2023-4379

Meltem Ürer, Aydin Demir

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Abstract

Abstract The epoxy composite specimens of certain sizes were produced by adding graphite, silicon carbide and boron carbide microparticles separately at the rates of 5, 10 and 15 wt% to the epoxy resin. Free vibrations of these composite samples were investigated experimentally in a simple supported vibration test setup. Frequency spectrums were obtained by modal analysis method in this experimental setup. The damping ratios were calculated using the half power bandwidth method. The mechanical properties of these composite specimens were also determined by applying the tensile test. By controlling the obtained vibration values theoretically, the effects of microparticle contributions to these specimens at certain rates on natural frequency and damping properties were investigated in detail. The maximum reduction in natural frequency was observed at 5 wt% of each reinforcement. Only the first natural frequency of the 15 wt% boron carbide reinforced epoxy composite was slightly increased. The damping ratio was increased at 10 wt% graphite added and 5 wt% boron carbide added epoxy composites compared to pure epoxy, but decreased in other composite specimens.

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微粒增强环氧树脂复合材料的自由振动行为及某些力学性能

摘要在环氧树脂中分别以5、10和15wt%的比例添加石墨、碳化硅和碳化硼微粒，制备了一定尺寸的环氧复合材料试样。在一个简单的支撑振动测试装置中，对这些复合材料样品的自由振动进行了实验研究。在该实验装置中，通过模态分析方法获得了频谱。阻尼比采用半功率带宽法计算。还通过拉伸试验测定了这些复合材料试样的力学性能。通过从理论上控制获得的振动值，详细研究了微粒在一定速率下对这些试样的贡献对固有频率和阻尼性能的影响。在每种增强物的5wt%处观察到固有频率的最大降低。只有15wt%碳化硼增强环氧树脂复合材料的第一固有频率略有增加。与纯环氧树脂相比，添加10wt%石墨和5wt%碳化硼的环氧复合材料的阻尼比增加，但在其他复合材料试样中阻尼比降低。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.