Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2019 - September 11, 2019
The estimate of the fatigue life of mechanical parts may be performed using an inelastic FEA. The procedure of the analysis is complicated and needs computation cost and labor because the considerations of scattering material properties and effects of loading history. Therefore, it is thought to be realistic to use simplified estimation methods based on elastic FEA together with Neuber’s rule type approximation. The Neuber’s rule is known to result in non-conservative estimate of inelastic strains in widespread plasticity. In place of the Neuber’s rule, the SRL (Stress Redistribution Locus) approach has been investigate as one of the methods expected to be applicable to such estimations. The validity of the approach has been studied mostly through numerical examples. Theoretical investigation for general geometries has not performed well enough. General-shaped bodies under a constant displacement-controlled loading are proved to show an SRL where Neuber’s rule type hyperbola approaches to a straight line depending on the stress exponent of the plastic law. This paper investigates into a characteristic of SRL for pure thermal loadings.
