Torsion of the nonhomogeneous anisotropic thin-walled bars with curvilinear profile

The paper is devoted to the solution of the torsional problem of nonhomogeneous, anisotropic prismatical bars. For this problem recurrent differential equations and boundary conditions have been obtained by the method of small geometrical parameter. A special case is considered when the coefficients of elasticity are given in the exponential function form.