The modelling of the 2-D anisotropic continuum

The paper is focused to the 2-D continuum - the fiat fabric material. The fabric material represents the anisotropic continuum. The description of the general anisotropic material, types of anisotropy and the calculation of the physical constants ofthe stiffness matrix are mentioned in the paper. The second part of the paper is focused to the methodology of the "flexi tank" modeling. The "flexi tank" is the light equipment for transport and storage of fluids. The anisotropic material properties are accompanying by the geometrie non-linearity. The deformation, the stress state and the volume of the fluid are results of the modeling.