A System for Magnetic Characterization of Advanced Multifunctional Magnetoactive Soft and Hard Materials

先进多功能磁活性软硬材料磁表征系统

• 批准号: RTI-2022-00552
• 负责人: Sedaghati, Ramin
• 金额: $ 10.93万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=741760
• 关键词: System; Magnetic; Characterization; Advanced; Multifunctional

Among smart materials, magnetoactive elastomers (MAEs) are truly multifunctional materials as they can vary their dynamic properties (stiffness and damping) semi-actively as well as providing controlled actuation owing to their inherent magnetostriction effect. These properties, combined with their unique features such as flexibility, fail-safe, fast-response (less than few milliseconds) and low-power requirement, have made MAEs revolutionary smart materials for the development of next generation of adaptive structures for wide range of applications, ranging from space structures and transportation systems to civil infrastructure, defense and medical systems. Field-dependent elastic and loss moduli of MAEs have made them ideal smart materials for developing high-bandwidth adaptive energy absorption devices. Such novel smart devices can be integrated within the ground, aerospace and marine vehicle structures for effective mitigation of transmitted vibration, structure-born noise and shocks in real time under unpredictable environmental conditions. The recently developed Hard-MAEs (H-MAEs), where the typically-used soft micro-sized ferromagnetic particles in MAEs are replaced by hard permanent magnetic particles, have shown unique properties. Although the current knowledge on magnetostriction properties of H-MREs is very limited, these have shown reduced modulus by reversing the magnetic field direction and considerable magnetostriction effect that may be exploited for developing novel magnetically driven artificial muscles and soft actuators in biomedical, smart sensors for point-of-care diagnostics, robotics and microfluidic applications. The proposed equipment is a unique device which enable to efficiently and accurately characterize magnetic properties of various magnetoactive materials (MAEs, H-MAEs, Hybrid MAEs, magnetostrictive and magnetoresistive materials) which are of paramount importance for accurate modeling and design optimization of adaptive structures and systems featuring magnetoactive materials. In order to understand the behavior of magnetoactive-based adaptive systems and structures and also to better realize their potential applications, it is extremely important to accurately predict their dynamic characteristics under broad ranges of external excitations and operating factors. The accurate characterizations of magnetic properties of different types of magnetoactive materials under varying magnetic field intensities is thus of paramount importance to build a better understanding of the magnetic properties of magnetoactive materials. The requested equipment with its unique features can be effectively utilized to conduct versatile tests on different types of magnetoactive materials for mapping their magnetic properties under varied applied magnetic field. Such information is critical for developing high-fidelity physic-based models to predict magneto-mechanical behavior of magnetoactive materials.

在智能材料中，磁致弹性体（MAE）是真正的多功能材料，因为它们可以半主动地改变其动态特性（刚度和阻尼），以及由于其固有的磁致伸缩效应而提供受控的致动。这些特性，结合其独特的功能，如灵活性，故障安全，快速响应（小于几毫秒）和低功耗要求，使MAE革命性的智能材料，用于开发下一代自适应结构，用于广泛的应用，从空间结构和运输系统到民用基础设施，国防和医疗系统。MAE的弹性模量和损耗模量随磁场的变化使其成为开发高带宽自适应能量吸收器件的理想智能材料。这种新颖的智能设备可以集成在地面、航空航天和海洋车辆结构中，用于在不可预测的环境条件下真实的实时有效地减轻所传递的振动、结构产生的噪声和冲击。近年来发展起来的硬磁微球（H-MAEs），其中通常使用的软微尺寸的铁磁颗粒在MAEs中被硬永磁颗粒所取代，显示出独特的性能。虽然目前关于H-MRE的磁致伸缩性质的知识非常有限，但是这些已经显示出通过反转磁场方向而降低的模量和相当大的磁致伸缩效应，其可以用于开发生物医学中的新型磁驱动人工肌肉和软致动器、用于即时诊断的智能传感器、机器人和微流体应用。所提出的设备是一种独特的设备，能够有效和准确地表征各种磁致活性材料（MAE，H-MAE，混合MAE，磁致伸缩和磁阻材料）的磁特性，这对于具有磁致活性材料的自适应结构和系统的精确建模和设计优化至关重要。为了更好地理解磁致伸缩自适应系统和结构的行为，并更好地实现其潜在的应用，它是非常重要的，以准确地预测其在广泛的外部激励和操作因素下的动态特性。因此，在不同的磁场强度下的不同类型的磁致活性材料的磁性能的准确表征是至关重要的，以建立一个更好地理解磁致活性材料的磁性能。所要求的设备具有其独特的功能，可以有效地用于对不同类型的磁活性材料进行多功能测试，以绘制其在不同外加磁场下的磁性能。这些信息对于开发高保真度的基于物理的模型来预测磁致活性材料的磁机械行为是至关重要的。