Hybrid Magnetostrictive Composite Material for Active Control

9815208 Carman该提案描述了开发和理解创新耦合混合磁-机械复合材料的研究工作。该复合材料代表了一种磁致伸缩（活性）材料，当受到外部磁场时会弹性变形。它包含磁致伸缩和硬/软铁磁颗粒与粘合剂树脂的混合物，并在空间变化的磁场下固化。在固化过程中施加的磁场将颗粒排列成连续的链，并在材料内形成连续的磁路。硬/软铁磁颗粒增强了复合材料的磁性能，并直接影响磁致伸缩。一个主要的基础科学问题是不同粒子之间的磁相互作用在多大程度上有助于改变内部磁路。与单片磁致伸缩材料相比，混合磁致伸缩颗粒复合材料（HMPC）提供了几个优点，包括增加的断裂韧性、减少的磁滞、更大的带宽响应、消除外部偏置和预加载以及可能降低的驱动水平。

9815208CarmanThis proposal describes a research effort to develop and understand an innovative-coupled hybrid magneto-mechanical composite material. The composite represents a magnetostrictive (active) material that elastically deforms when subjected to an external magnetic field. It contains a blend of both magnetostrictive and hard/soft ferromagnetic particles with a binder resin and it is cured under a spatially variant magnetic field. The magnetic field applied during cure aligns the particulates into continuous chains and forms a continuous magnetic circuit within the material. The hard/soft ferromagnetic particles enhance the magnetic properties of the composite and directly influence magnetostriction. One of the primary basic science questions is to what extent does magnetic interaction between dissimilar particles contribute to altering the internal magnetic circuit. The Hybrid-Magnetostrictive-Particulate-Composite (HMPC) provides several advantages when compared to the monolithic magnetostrictive materials including increased fracture toughness, reduced hysteresis, larger bandwidth response, elimination of external biasing and preloading, and possibly decreased drive levels.