652 publications from this institution
Silkworm cocoon has a complex hierarchic structure with discontinuity. In this paper, heat transfer through the silkworm cocoon is studied using fractal theory. The fractal approach has been successfully applied to explain the fascinating phenomenon of cocoon survival under extreme temperature environment. A better understanding of heat transfer mechanisms for the cocoon could be beneficial to the design of biomimetic clothes for special applications.
A nonlinear dynamic model is established for two-strand spun or Sirospun yarns. The homotopy perturbation method proposed in our earlier work is used to calculated the approximate oscillating periods in the vertical and horizontal directions. The study reveals that the optimal convergence angle of the two strands in equilibrium is 90°, while when the convergence angle is near 127°, resonance occurs.
