CAREER: Multiscale Thermomechanical Analysis of Nanomaterials and Nanostructures

职业：纳米材料和纳米结构的多尺度热机械分析

• 批准号: 0955096
• 负责人: Gang Li
• 金额: $ 40万
• 依托单位: Clemson University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-04-15 至 2016-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0955096&HistoricalAwards=false
• 关键词: CAREER; Multiscale; Thermomechanical; Analysis; Nanomaterials

0955096LiThis CAREER project seeks to develop a theory and methodology for analysis of multiscale thermomechanical nanomaterials and structures. The operation of many ultrasmall devices involves strong thermomechanical interactions. However, a gap exists between the existing continuum and atomistic models. Accurate and efficient computational tools are not available for systematic analysis of such systems. This research aims to fill this gap by introducing novel thermomechanical models to bridge the continuum and atomistic theories. Computational tools will be developed for analysis and optimization of nano -thermomechanical systems.Intellectual Merit: A mathematical model describing the thermomechanical interactions on the atomistic level and a quasi-continuum theory with a higher level of abstraction will be established. A multiscale computational approach, combining the thermomechanical models will be developed. Computational analysis of nanoscale resonators, atomic force microscope heaters and composite materials will be conducted to address a set of technologically important issues such as thermal dissipation, thermal management and surface effects in these devices and materials. In addition, a concept of mechanical design of thermal transport in materials is to be explored.Broader Impacts: The proposed research will provide theoretical and computational models that bridge the gap between pure atomistic and continuum models. Research results will address the fundamental issues of nanoscale thermomechanical interactions. Project outcomes will be disseminated through technical publications. Software tools developed in conjunction with this project will be made available to the thermal transport and mechanics communities. In addition, the PI will establish a web portal and engage in outreach with K-12, undergraduate and graduate students through simulation-based learning and discovery.

[955096]这个职业项目旨在发展多尺度热机械纳米材料和结构分析的理论和方法。许多超小型装置的运行涉及强烈的热-机械相互作用。然而，在现有的连续体模型和原子模型之间存在着差距。目前还没有准确、高效的计算工具来对这类系统进行系统分析。本研究旨在通过引入新的热力学模型来填补这一空白，以连接连续统和原子理论。计算工具将被开发用于分析和优化纳米热机械系统。智力优势：将建立一个在原子水平上描述热-力学相互作用的数学模型和具有更高抽象水平的准连续统理论。结合热力学模型的多尺度计算方法将得到发展。将对纳米级谐振器、原子力显微镜加热器和复合材料进行计算分析，以解决这些器件和材料中的散热、热管理和表面效应等一系列技术重要问题。此外，还将探讨材料热输运的机械设计概念。更广泛的影响：提出的研究将提供理论和计算模型，弥合纯原子和连续体模型之间的差距。研究成果将解决纳米尺度热-机械相互作用的基本问题。项目成果将通过技术出版物传播。与该项目一起开发的软件工具将提供给热传输和力学社区。此外，PI将建立一个门户网站，并通过基于模拟的学习和发现与K-12，本科生和研究生进行外展。