COMBINED TORSIONAL BUCKLING OF DOUBLE-WALLED CARBON NANOTUBES WITH RADIAL PRESSURES IN ELECTRICAL AND THERMAL ENVIRONMENT
Based on the fact that carbon nanotubes(CNTs) always serve in electrical and thermal environment and that the loads on CNTs are often complicated, the combined torsional buckling of double-walled carbon nanotubes (DWCNTs) with radial pressures working in electrical and thermal condition has been theoretically studied in this piece of paper.so as to provide some reliable basis for the design of project practice. The governing equation of critical buckling for CNTs under thermo-electro-mechanical loadings has been established in theory by an elastic shell model of continuum mechanics. The effect of torsional load, radial pressures, applied electrical and thermal loads, surrounding elastic medium and the Van der Waals forces are taken into account at the same time. The critical buckling condition for DWCNTs has been derived in terms of the buckling modes and the parameters indicating the effect of thermo-electro change,surrounding elastic medium and the Van der Waals forces. Theoretical expression of the critical shear stress is obtained clearly with some simplified analyses in coincide with the previous literature. Besides, numerical results in general case are investigated under different load conditions. The effect of thermal field, electrical field and radial pressures on the critical shear stress is established specifically. All the results are meaningful when designing nano-structures closely related to the buckling of DWCNTs.
Double-walled carbon nanotubes Buckling Thermo-electro-mechanical loadings Combined
Yugang Sun Xiaohu Yao Xiaoqing Zhang Qiang Han
Department of Engineering Mechanics, School of civil engineering and transportation, South China University of Technology, Guangzhou 510640 China
国际会议
广州
英文
158-164
2010-12-17（万方平台首次上网日期，不代表论文的发表时间）