AI 中文总结
本文针对硬磁性软物质中宏观应变与微观运动映射缺乏共识的问题，通过反例揭示现有模型缺陷，提出第一性原理框架并推导出统一的最优变形映射闭合定律，为磁驱动软器件设计提供理性基础。
AI 中文摘要
硬磁性软材料，即含有硬磁性颗粒的弹性体，能将磁能转化为复杂运动，已成为无系绳软机器人、生物医学器件设计以及实现快速无线驱动技术的核心。其行为关键取决于周围软基质如何变形并将扭矩传递给每个磁化夹杂物，然而对于宏观应变与微观运动之间的正确映射尚无共识。在相同载荷下，相互竞争的模型预测出相互矛盾的颗粒旋转和磁响应。在此，我们构建反例以揭示这些模型的关键缺陷，进而建立一套第一性原理框架，得出最优变形映射。所得的闭合形式定律统一了相互竞争的模型，并表明它们实际上只是我们通用方法的不同极限情况。我们的工作为磁驱动软器件的理性设计提供了可能，并给出了磁性软物质乃至类似架构材料中变形的统一视角。
英文摘要
Hard Magnetic Soft Materials, i.e., elastomers seeded with hard magnetic particles, convert magnetic energy into complex motion and have become central to the design of untethered soft robots, biomedical devices, and, in general, for enabling fast, wireless actuation. Their behavior depends critically on how the surrounding soft matrix deforms and transmits torque to each magnetized inclusion, yet there is no consensus on the correct mapping between macroscopic strain and microscopic motion. Competing models predict conflicting particle rotations and magnetic responses under identical loads. Here, we construct counterexamples that show the key shortcomings in these models, and then establish a first-principles framework that leads to an optimal deformation mapping. The resulting closed-form law unifies conflicting models and shows that they are, in fact, simply different limits of our general approach. Our work permits the rational design of magnetically actuated soft devices and a unified view of deformation in magnetic soft matter, and broadly, in similar architectured materials.
CommentsTo appear in PNAS Nexus
