Abstract Off-axis anisotropic magnetorheological (MR) elastomers with different particle chain orientations were investigated. Under the quasi-static and oscillatory shear excitation, the internal structure has significant effects on the mechanical response (initial modulus, magneto-induced modulus and magneto-deformation). The MR effect of the anisotropic MR elastomers could be increased by 127% through simply changing the particle chain orientation by 15° during the fabrication process. The experimental results were verified by using a modified magnetic dipole theoretical model. The magneto-induced torque and normal force of the anisotropic MR elastomers could be significantly affected by the orientation of particle chain, which had great guiding significance for practical applications. Moreover, the MR elastomer composites could achieve complex three-dimensional origami deformations under the external magnetic field. The capability to control the shape morphing of this off-axis anisotropic MR elastomer might open new opportunities for programming complex soft structures.

中文翻译：

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离轴各向异性磁流变弹性体的磁力学性能

摘要 研究了具有不同粒子链取向的离轴各向异性磁流变（MR）弹性体。在准静态和振荡剪切激励下，内部结构对机械响应（初始模量、磁致模量和磁变形）有显着影响。通过在制造过程中简单地改变粒子链方向 15°，各向异性 MR 弹性体的 MR 效应可以增加 127%。通过使用改进的磁偶极子理论模型验证了实验结果。各向异性MR弹性体的磁致转矩和法向力受粒子链取向的显着影响，对实际应用具有重要指导意义。而且，MR弹性体复合材料可以在外部磁场下实现复杂的三维折纸变形。控制这种离轴各向异性 MR 弹性体的形状变形的能力可能为编程复杂的软结构开辟新的机会。