Extension of the Vaughan-Florence Analysis of Dynamic Buckling of a Rigid-Plastic Cylindrical Shell

摘要

The paper contrasts the results of the HVS analysis based on the full equation, with those of the VF analysis, for a steel core support barrel representative of industrial nuclear powerplant practice. It is found that the decrease in criticality is not as spectacular as it is for the aluminum test shell of VF. For the latter one finds A/sub HVS, peak//A/sub VF, peak/ = 37%, whereas for the steel shell the ration is 61%. (In both cases the value of the critical mode number changes insignificantly when going from VF to HVS.) The reason for the diminished improvement in the case of the steel shell: the greatly diminished value for steel, as constrasted with aluminum, of the ratio E/sub t// sigma of strain hardening modulus to yield stress. (ERA citation 05:006054)