We study the strength of paper using computer simulations. Our model is a stressed mechanical 2D random fibre network (RFN), the equilibrium of which is computed using a commercial FEM (Finite Element Method) solver Abaqus. The novelty in our approach lies in more detailed introduction of mechanical properties of fibres and bonds into the mechanical model, enabling the study of effects of microscopic (fibre/bond – level) properties.on relations between macroprocessor properties.
The mechanical properties of fibres and bonds are defined by Young’s modulus (or moduli in anisotropic case) and stress displacement curve. In our video presentation, fibres are purely elastic whereas bonds are elastic-plastic. The video shows the behaviour of network being stressed by forcing increasing displacement on one boundary