Abstract: A method of determining the elastoplastic behavior of components, in particular of gas turbine plants, at high temperatures.

Abstract: A method of determining the elastoplastic behavior of components, in particular of gas turbine plants, at high temperatures.

Abstract: In a method for determining the elasto-plastic behavior of components consisting of anisotropic material, in particular of gas turbine installations, at high temperatures, in which method, first of all, the linear-elastic behavior is determined and, on the basis of the linear-elastic results, the inelastic behavior is also taken into account by applying Neuber's rule, the anisotropic properties of the components, as occur in particular on account of the use of single crystal materials, are taken into account in a simple manner by using a modified anisotropic Neuber's rule of the form σ * 2 = σ ep 2 + σ ep 2 ⁢ D _ · E — —

Abstract: A method of estimating the lifetime of a thermal barrier coating (14), which is applied to the surface of a member subjected to cyclical thermal loads, especially a vane and/or blade of a gas turbine, by means of a bond coat (12) lying in between the coating and the member, leads to more accurate results with simplified calculation by determining, in a first step, the amplitude of the normal stress (&Dgr;&sgr;n) perpendicular to the interface between the bond coat (12) and the thermal barrier coating (14) during cyclical loading, and calculating, in a second step, the number Ni of cycles to failure for every normal stress amplitude (&Dgr;&sgr;n) in accordance with the formula N i ⁢   = C ⁡ ( △σ n σ 0 ) m

Abstract: A method of estimating the lifetime of a thermal barrier coating (14), which is applied to the surface of a member subjected to cyclical thermal loads, especially a vane and/or blade of a gas turbine, by means of a bond coat (12) lying in between, leads to more accurate results with simplified calculation by determining, in a first step, the amplitude of the normal stress (&Dgr;&sgr;n) perpendicular to the interface between the bond coat (12) and the thermal barrier coating (14) during cyclical loading, and calculating, in a second step, the number Ni of cycles to failure for every normal stress amplitude (&Dgr;&sgr;n) in accordance with the formula 1 N i = ( C ⁢ ( Δσ n σ 0 ) ) m

Abstract: In a method for determining the elasto-plastic behavior of components consisting of anisotropic material, in particular of gas turbine installations, at high temperatures, in which method, first of all, the linear-elastic behavior is determined and, on the basis of the linear-elastic results, the inelastic behavior is also taken into account by applying Neuber's rule, the anisotropic properties of the components, as occur in particular on account of the use of single crystal materials, are taken into account in a simple manner by using a modified anisotropic Neuber's rule of the form 1 σ * 2 = σ e ⁢   ⁢ p 2 + σ e ⁢   ⁢ p 2 ⁢ D _ · E _ _ E R · D _ ⁢ σ v * 2 σ * 2 ⁢ α ⁡ ( σ e ⁢   ⁢ p 2 σ 0 2 ⁢ σ v * 2 σ * 2 ) n - 1