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. Author manuscript; available in PMC: 2012 Jun 1.
Published in final edited form as: Acta Biomater. 2011 Feb 20;7(6):2374–2383. doi: 10.1016/j.actbio.2011.02.026

Figure 1.

Figure 1

Models for isotropic networks. (a) In the eight-chain model eight chains (or fibers) connect the vertices of cube to the body center. The strain energy density of the cube is computed by summing the energy stored in the deformation of each of the fibers. This model is an improvement over the three-chain model and has been successfully applied to many isotropic networks. (b) An eight-chain cube in a deformed state in which there is stretching in the longitudinal direction and contraction along the other two orthogonal directions. Note that the fiber diameters in the deformed configuration are smaller than those in the undeformed configuration.