Ranjith P, Kumar P B Sunil
Department of Physics, Indian Institute of Technology Madras, Chennai 600 036, India.
Phys Rev Lett. 2002 Jul 1;89(1):018302. doi: 10.1103/PhysRevLett.89.018302. Epub 2002 Jun 14.
The dynamics of a single semiflexible filament under the action of a compressing force is simulated. We find that the filament folds asymmetrically with a folding length which depends only on the bending stiffness kappa and the applied force f. It is shown that this behavior can be attributed to the exponentially falling tension profile in the filament. While the folding time tau(0) depends on the initial configuration, the distance moved by the terminal point of the filament and the length of the fold scales as tau(1/2) at tau>>tau(0) and is independent of the initial configuration.
模拟了单根半柔性细丝在压缩力作用下的动力学过程。我们发现，细丝会不对称折叠，其折叠长度仅取决于弯曲刚度κ和外加力f。结果表明，这种行为可归因于细丝中呈指数下降的张力分布。虽然折叠时间τ(0)取决于初始构型，但在τ>>τ(0)时，细丝端点移动的距离和折叠长度与τ的1/2次方成正比，且与初始构型无关。
