Figure 1.

Schematics for the geometry and deformation of different network models under simple shear. (a) Affine model. Each point on the spherical surface represents a unique fibre orientation, with only one representative fibre shown in the figure. (b) Three-chain model, where each fibre is aligned with one of the edges of the unit cell. (c) Eight-chain model, where each fibre connects the centre of the unit cell to one of the cell vertices. (d) Micro-sphere model. Each point on the spherical surface represents a unique fibre orientation, with all the fibres stretched to the same degree. The rotation of the fibres, however, is not well defined; thus, fibre deformation is not shown in the figure.