Evaluation of Steel Vertical Tank Residual Life by a Metal Low-Cycle Fatigue Criterion Under Biaxial Loading Conditions

Abstract

Factors are considered affecting correct evaluation of tank service life: the effect of the form of biaxial stressed state on tank material cyclic crack resistance properties, and the dependence of stress-strained state at the tip of a defect specifying stress intensity factor on operating conditions, defect size, and structure geometric features. A universal algorithm is proposed on the basis of numerical and experimental research for calculating the number of cycles to failure for a tank wall with a crack-like surface defect.