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首页> 外文期刊>Smart Materials & Structures >Numerical investigation on the magnetostrictive effect of magneto-sensitive elastomers based on a magneto-structural coupling algorithm
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Numerical investigation on the magnetostrictive effect of magneto-sensitive elastomers based on a magneto-structural coupling algorithm

机译：基于磁-结构耦合算法的磁敏弹性体磁致伸缩效应的数值研究

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Magneto-sensitive elastomers (MSEs) are composite materials with ferromagnetic particles embedded in rubber matrices. Their mechanical properties can be changed by applying an external magnetic field. Although their stiffness and damper properties have been extensively studied, only a few studies have been involved with their magnetostriction behaviors, which have potential applications in sensors. To observe the interaction mechanisms between mechanical and magnetic fields and to investigate the magnetostrictive effect numerically, a novel magneto-structural coupling algorithm was developed. A magnetostrictive test system was also developed and fabricated for validating the simulation method. Several MSE samples embedded with millimeter-sized particles were fabricated and tested. The simulation results agreed well with the experimental results. Also both of them showed negative magnetostrictive strains for the specified samples and test conditions in this study. The contributions of four influencing factors were evaluated, and some results were concluded. Before magnetic saturation, the bigger the magnetic field strength is, the stronger the magnetostrictive effect is, and their relationship follows a quadratic polynomial expression. The closer the distance between two adjacent particles is, the stronger the magnetostrictive effect is, and their relationship satisfies a cubic polynomial equation. The higher the particle volume fraction is, the stronger the magnetostrictive effect is, and there is a linear relationship between them. The particle diameter has little influence on the magnetostrictive effect.
机译：磁敏弹性体（MSE）是复合材料，其中铁磁颗粒嵌入橡胶基质中。可以通过施加外部磁场来改变其机械性能。尽管对其刚度和阻尼特性进行了广泛的研究，但只有很少的研究涉及其磁致伸缩行为，这在传感器中具有潜在的应用。为了观察机械和磁场之间的相互作用机理并数值研究磁致伸缩效应，开发了一种新颖的磁-结构耦合算法。还开发并制造了磁致伸缩测试系统以验证模拟方法。制作并测试了几颗嵌入毫米大小颗粒的MSE样品。仿真结果与实验结果吻合良好。在本研究中，对于指定的样品和测试条件，它们都显示出负的磁致伸缩应变。评价了四个影响因素的贡献，并得出了一些结论。在磁饱和之前，磁场强度越大，磁致伸缩效应越强，并且它们的关系遵循二次多项式表达式。两个相邻粒子之间的距离越近，磁致伸缩效应越强，并且它们的关系满足三次多项式方程。颗粒体积分数越高，磁致伸缩效应越强，并且它们之间存在线性关系。粒径对磁致伸缩效应影响很小。

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