Nets

Abstract

A net is an assembly of two noncoinciding arrays of linear elements (cables, wires, or fibers) located on one surface. Each element usually intersects only the elements of the other array, although singular points, like the pole in a radial-hoop system, may exist. Unless the intersections are fastened, mutual in-surface slipping (but not delamination) of the cables is assumed possible. Accordingly, the described model applies not only to cable or fiber nets proper, but also to two-ply fabrics with a conventional weave. In this case, the possibility or absence of fiber slipping are attributable, respectively, to negligible or very high friction. Regardless of whether or not the element intersections are fastened, a net is an underconstrained structural system. It allows singular configurations, of which some lack kinematic mobility (quasi-variant nets).