MRI: Acquisition of A 3D Scanning Laser Vibrometer

磁流变弹性体复合材料是为数不多的能够在工程应用中提供令人满意的四种基本性能的智能材料之一：快速响应、宽可控范围、长期稳定性和简单的伺服系统。然而，它们在存储模量方面相当软，在阻尼比方面不可控，这削弱了它们在传感器、致动器和半有源器件中的巨大潜力。在本项目中，我们的目标是开发一种新型的碳纳米管增强磁流变弹性体纳米复合材料的集成制造和测试系统，与现有的磁流变复合材料相比，其性能可以显著提高和主动控制。该系统由材料制造模块和材料测试模块组成，分别控制铁颗粒和碳纳米管形成所需的微尺度和纳米尺度结构。这项研究的完成和成功将使我们能够制造出性能和功能都得到改善的最先进的智能纳米复合材料。我们致力于利用已建立的体系，研究和优化纳米复合材料在各种工程应用中的性能，如用于民用基础设施地震防护的智能阻尼器和隔震器，用于结构健康监测的压力传感器，用于汽车系统的自适应动力执行器和半主动悬架，以及用于声纳系统的自适应声发射器。该项目是第一次尝试开发这种MR智能纳米复合材料的制造和测试系统。这将为智能纳米复合材料在各种工程应用领域的深入研究奠定坚实的基础。它将促进材料科学家、结构工程师和固体力学研究人员之间的跨学科研究。此外，它将提供最先进的仪器和机会，为多样化的学生提供研究培训，以获得在材料设计和系统集成以及实际控制系统实施方面的实践培训经验。pi建议获得一个3D扫描激光测振仪，它将提供3D非接触式振动实验数据。拟议的设备将使探索新的研究领域，如健康监测和耐撞性。

Magnetorheological (MR) elastomer composites are among a few smart materials which can provide satisfactory performance on the four essential properties for engineering applications: quick-response, wide-controllable range, long-term stability, and simple servo-system. However, they are quite soft with respect to the storage moduli and uncontrollable in terms of damping ratios, impairing their great potentials applied to sensors, actuators, and semi-active devices. In this project, we aim to develop an integrated fabrication and testing system for novel MR elastomer nanocomposites reinforced with carbon nanotubes (CNTs), whose properties can be significantly improved and actively controlled in comparison with the existing MR composites. The system consists of a materials fabrication module and a materials testing module to control the ferrous particles and CNTs to form desired micro-scale and nano-scale structures respectively. The completion and success of the development will allow us to fabricate the state-of-the-art smart nanocomposites with improved performance and functionality. We are committed to taking advantages of the established system to investigate and optimize the nanocomposites performance for various engineering applications such as smart dampers and isolators for seismic protection of civil infrastructure, pressure sensors for structural health monitoring, adaptive power actuators and semi-active suspension for automobile systems, and adaptive acoustic emitters for sonar systems.This project is among the first attempt to develop such a fabrication and testing system for MR smart nanocomposites. It will lay a solid foundation for advanced research in the area of smart nanocomposites with various engineering applications. It will promote cross-disciplinary research among materials scientists, structural engineers, and solid mechanics researchers. Furthermore, it will provide the state-of-the-art instrumentation and opportunity for research training of diversified students to gain experience on hand-on training in materials design and system integration as well as actual control systems implementations.Intellectual merit of the proposed activity: Strengths The PIs propose to acquire a 3D scanning laser vibrometer which will provide 3D non-contact vibration experimental data. The proposed equipment will enable the exploration of new areas of research such as health monitoring and crashworthiness.