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基于天然/聚乙烯-的混合磁铁质弹性体三明治复合结构的动态行为建模

Ahobal N^1,2, Lakshmi Pathi Jakkamputi³, Sakthivel Gnanasekaran²

¹Department of Mechanical Engineering, Dayananda Sagar College of Engineering, Bengaluru 560078, India.

|January 17, 2024

概括

这项关于混合磁力质弹性体 (MRE) 束的研究表明,自然频率增加,具有更高的PBR含量和磁场. 缓冲也得到了显著的改善,为先进的工程应用提供了潜力.

科学领域:

材料科学材料科学材料科学
机械工程机械工程
复合材料复合材料复合材料

背景情况:

磁性弹性体 (MRE) 是智能材料,其性能因磁场的影响而发生变化.
混合MRE结合了不同的弹性体以优化性能.
了解MRE结构的动态行为对于它们在振动控制中的应用至关重要.

研究的目的:

研究基于天然 (NR) /聚乙烯 (PBR) 的混合MRE三明治复合体梁的动态特性.
分析磁场强度,边界条件,层方向和核心厚度对振动响应的影响.
探索混合MRE三明治复合材料的性能提升潜力.

主要方法:

使用了数值模拟和有限元分析.
采用了雷迪的第三阶剪切变形理论.
对四种不同的混合MRE三明治配置进行了检查,并与基于MR流体的复合材料进行了验证.

主要成果:

在600mT磁场下基于SC4的光束中,由于PBR含量增加,自然频率增强了10.4%,而边界条件没有紧,由于PBR含量增加.
较高的磁场强度导致频率略有下降,这归因于填充物颗粒聚合.
在没有紧的条件下,损失因子随着磁场强度和MRE含量增加而提高了66%至136%.

结论:

混合MRE三明治复合材料表现出受磁场和材料组成影响的可调节动态特性.
该研究表明,自然频率和减噪的显著改善,突出了对振动控制应用的潜力.
这项研究提供了关于磁场效应,复合结构和MRE中振动响应之间的复杂关系的宝贵见解.

关键词:

动态行为建模动态行为建模混合动力 MRE 是一种混合动力.聚合物复合物的聚合物复合物.这就是三明治结构.智能结构是一个智能结构.振动振动振动是一种振动.

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