Stability analysis of carbon nanotubes with continuum mechanics

碳纳米管的连续介质稳定性分析

• 批准号: 341060-2007
• 负责人: Wang, Quan
• 金额: $ 1.57万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=458258
• 关键词: Stability; analysis; carbon; nanotubes; continuum

Since 1990s, carbon nanotubes (CNTs), about a hundred times stronger than steel at 1/6th the weight, have been discovered to hold great potential for countless technology innovations and applications, such as extremely lightweight and strong fabrics, chemical sensors, electrical sensors, fuel cells, and drug delivery. Business Communication Company estimates that global sales of CNTs will reach US$231.5 million in 2006. Unfortunately, CNTs' prompt and wide applications are hindered by insufficient understanding of their mechanical behaviour. Among many challenges, CNTs' stability analysis such as kink instability (abrupt changes of curvature due to compression) and post-buckling (large deformation due to compression) calls for a breakthrough. For example, inadequate understanding of CNTs' kink instability has been a major setback to the design of CNT based Atomic Force Microscope (AFM). Classic molecular dynamics is only applicable to stability analysis of systems with a small number of molecules and atoms.

自20世纪90年代以来，碳纳米管（CNT），约100倍的钢在1/6的重量，已被发现拥有巨大的潜力，无数的技术创新和应用，如极轻和强大的织物，化学传感器，电传感器，燃料电池和药物输送。商业通讯公司估计，2006年全球碳纳米管销售额将达到2.315亿美元。然而，由于对碳纳米管力学行为的认识不足，阻碍了其迅速而广泛的应用。在许多挑战中，碳纳米管的稳定性分析，如扭结不稳定性（由于压缩导致的曲率突变）和后屈曲（由于压缩导致的大变形），需要突破。例如，对CNT的扭结不稳定性的不充分理解已经成为基于CNT的原子力显微镜（AFM）的设计的主要挫折。经典的分子动力学方法只适用于分子和原子数目较少的系统的稳定性分析。