Shakedown Analysis of the Pressure Piping Bend under Cycle Moving Thermal Loadings

The shakedown behavior of the pressure piping bend under cyclic moving thermal loadings was researched by finite element software ANSYS.The results showed that the elastic shakedown assessment diagram of the bend can be obtained by substituting the limit load of the bend for the limit load of the straight piping in the shakedown assessment diagram of the straight piping under the steady condition.Moreover,the shakedown domain of the bend segment and the straight piping section under the high-speed moving temperature load is smaller than those of under the low-speed moving state.Furthermore,the shakedown domain of straight piping segment and bend section under the low-speed moving temperature load is consistent proximately.It has directive significance for the shakedown design and evaluation of the pressure piping bend under cycle moving thermal loadings.