Finite Element Analysis of Multi-Position Fatigue Fracture Damage of Nuclear Pipeline Based on X-ray Scattering

Abstract

The traditional finite element analysis method has poor performance in identification, and there are errors in the selected identification position, resulting in the fact that the accuracy of the results of the finite element analysis is not high. Therefore, based on the characteristics of X-ray scattering, a new finite element analysis method for multi-position fatigue fracture of damage nuclear pipeline is proposed. In this method, a nuclear pipe model is constructed and the three-dimensional scattering identification density of X-ray is established. Based on the creep curve, the material parameters of the nuclear pipeline are analyzed, and the damage index grade is divided according to the yield strength and other parameters; the equivalent stress is calculated, and the constitutive relationship between the material and the damage index is described according to the damage value. The classical scattering formula and Stokes formula are introduced to locate the position of the X-ray cut in node by setting the spatial and temporal distribution function. The parameters of random dynamic change are calculated, and the anchor nodes and position nodes are set to locate the scanning range of damage nuclear pipeline. Experimental results show that compared with the traditional three methods, the proposed method has higher recognition rate and more accurate finite element analysis results. It can be seen that the performance of this method is superior.