磁致弹性体在磁场下的平衡扭折形变
Equilibrium kink-like torsion deformation of a magnetoactive elastomer under a magnetic field
AI总结：
研究发现磁致弹性体在磁场下形成稳定扭折形变，其内部磁化方向因形状各向异性而不平行于外加磁场，导致非均匀弹性变形和低对称磁态。
摘要：
一种新型效应涉及在均匀磁场下作用于磁致弹性体（MAE）梁上时形成稳定的扭折形变。该现象通过包含软磁性碳铁微粒的硅氧基体梁进行了理论预测和实验验证。扭折形变作为梁中两种未变形均匀状态之间的过渡边界。我们证明在扭折区域，弹性弯矩由磁弹性弯矩补偿，在该区域梁的局部磁化方向由于形状各向异性不与施加的磁场方向平行。我们确立在扭折区域，MAE梁处于非均匀弹性变形、低对称性的磁态中。在扭折外侧，梁的磁化方向与磁场方向平行，对应于未变形、高对称性的均匀磁态。
英文摘要：
A novel effect involving the formation of a stable kink-like torsion deformation in a magnetoactive elastomer (MAE) beam subjected to a uniform magnetic field is theoretically predicted and experimentally confirmed. The phenomenon was demonstrated using an elastomer beam containing soft magnetic carbonyl iron microparticles within a silicone matrix. The torsion kink acts as a transition boundary between two undeformed homogeneous states of the beam. We show that the elastic moment is compensated by a magnetoelastic moment in the kink region, where the local magnetization of the beam is non-collinear to the applied magnetic field due to shape anisotropy. It is established that within the kink region, the MAE beam exists in a non-uniformly elastically deformed, low-symmetry magnetic state. Outside the kink, the beam's magnetization is collinear with the magnetic field, corresponding to an undeformed, high-symmetry homogeneous magnetic state.
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