Analytical identification of the progressive thermal buckling behavior in LMR

The main purpose of this paper is to describe the analytical identification of the progressive thermal buckling behavior based on the thermal ratcheting in the LMR structures subjecting the moving elevated temperature cycles occurring near the hot pool free surface. To do this, the constitutive equations of the Chaboche, which is provided by ANSYS, was used for a nonlinear material behavior model and the overall procedure for the progressive thermal buckling analysis was established. Using the established procedures, the progressive thermal buckling behavior was analytically identified for the cylindrical shell structure having the free edge and the assumed moving elevated temperature cycles. And the results of the detail sensitivity analyses for the effective factors affecting the progressive thermal buckling behavior were described in this paper