New modification of conjugated strength criterion

Abstract

The paper describes the experimental results for the combined loading of the specimen manufactured from the construction steel 11523, melt T31052. The first set of the specimen was loaded by the alternating torque amplitude. The second and third set of specimen was loaded by the combination of the bending moment and of the torque for two slants of 30 and 60 degrees in the conditions of the alternating cycle. The fourth set was loaded by the alternating amplitude of the bending moment. The conjugated strength criterion was applied on the experimental results. Further, new approximation based on the same boundary conditions as the described conjugated strength criterion was proposed. The required input parameters for the conjugated strength criterion were obtained from the stress-strain analysis of the specimen by the finite element method.