Mechanics of Damping in Nanostructured Materials

NSF提案标题：纳米结构材料的阻尼机理本论文提出了一种建模与实验相结合的方法，重点研究纳米结构材料，如碳纳米管（CNT）和CNT增强聚合物复合材料的阻尼性能。了解阻尼的起源，由于在长度尺度的显着减少是必不可少的开发应用，如纳米传感器和执行器，纳米复合材料，NEMS和组件的纳米电子。随着纳米尺度下比表面积的急剧增加，研究纳米尺度下的表面和界面效应成为研究的一个重要方面。 当纳米结构材料与不同类型的其他材料或系统集成并在不同的空间和时间尺度上运行时，这些效应变得重要。更具体地说，多尺度建模和仿真方法将开发用于研究CNT和CNT基聚合物复合材料的阻尼性能;然后将建模研究与实验程序相结合，以探索各种内在和外在参数，如结构，缺陷，温度，湿度和界面结合，这是理解CNT和CNT相关复合材料的阻尼机制的关键。最后，所获得的研究成果将完全纳入一个创新的教育计划，针对广泛的受众，包括毕业生，本科生，K-12和代表性不足的群体。由于该项目的主题也是研究界和工业界的主要兴趣，预计将通过造福国家经济产生社会影响。

Title of the NSF Proposal: Mechanics of Damping in Nanostructured MaterialsIn this proposal, an integrated modeling and experimental approach is proposed to have a focused study on the damping properties of nanostructured materials, such as carbon nanotubes (CNT) and CNT reinforce polymer composites. Understanding the origin of damping due to the dramatic reduction in the length scale is essential for developing applications such as nanoscale sensors and actuators, nanocomposites, NEMS, and components for nanoelectronics. With the dramatic increase in the surface-to-volume ratio at the nanometer length scale, a critical aspect of the research is to study the effects of nanoscale surface and interface. These effects become important as nanostructured materials are integrated with other materials or systems that are of different types and operate at different spatial and temporal scales. More specifically, a multiscale modeling and simulation approach will be developed for studying damping properties in CNT and CNT-based polymer composites; The modeling study will then be combined with an experimental program to explore various intrinsic and extrinsic parameters, such as structure, defect, temperature, humidity, and interface binding, that are critical for understanding the damping mechanism in CNT and CNT related composites. Finally, The research results obtained will be fully incorporated into an innovative educational program that targets at a wide range of audiences, including gradates, undergraduates, K-12 and underrepresented groups. Since the topic of this project is also of the key interest of both research communities and industries, the societal impact is expected through benefiting the nation's economy.