Nonlinear stick-spiral model for predicting mechanical behavior of single-walled carbon nanotubes

摘要: Based on a molecular mechanics concept, nonlinear stick-spiral model is developed to investigate the mechanical behavior of single-walled carbon nanotubes (SWCNTs). The capable predicting not only initial elastic properties (e.g., Young's modulus) but also stress-strain relations SWCNT under axial, radial, and torsion conditions. properties, ultimate stress, failure strain various loading conditions are discussed special attention has been paid effects tube chirality size. Some unique behaviors chiral SWCNTs, such as axial strain-induced torsion, circumferential shear extension studied. predicted results from present in good agreement with existing data, very little computational cost needed yield them.