Dynamic responses of irregular fibers under axial tension

Abstract

A numerical study on the dynamic responses of irregular fibers under axial tension is presented in this article. The irregularity was represented by a sinusoidal shape profile along the fiber axis. The finite element method was used in the simulations and the maximum first principal stress due to the dynamic pulling has been examined. Our numerical results indicate that the first principal stress mainly varies along the longitudinal direction. Its change in radial direction is negligibly small. The maximum first principal stress in an irregular fiber always appears in the narrowest crosssection, which is the weakest link of the fiber. The maximum first principal stress is very sensitive to the change in the irregular amplitude. The stress value increases dramatically with the increase in the amplitude of irregularity. The frequency of irregularity has a limited effect on the maximum first principal stress.

PAN/FPU Composite Nanofiber Membrane with Superhydrophobic and Superoleophobic Surface as a Filter Element for High‐Efficiency Protective Masks

“…A large number of researchers in the field of air filtration have shown that the pore size and distribution in porous materials have a significant impact on the filtration performance. [ 31–34 ] Nanofiber membranes with the same grammage were prepared by controlling the spinning time so that the basis weight range fell between 1.26 ± 0.1 g m −2 . The pore size of PAN‐9 to PAN‐15 varied from 2–4.5 µm.…”