Determination of the structural steels damage kinetics under non-stationary loading
Journal Title: Вісник Тернопільського національного технічного університету - Year 2018, Vol 89, Issue 1
Abstract
The article presents adapted techniques which make possible to assess the damage of steels at high cyclic fatigue under the amplitudes varying according to the random law. The method for material damage assessment is based on the LM-hardness method. The method for estimation of the fatigue damage kinetics under random asymmetric fatigue loading is based on the use of ultimate exhaustion of cyclic plasticity model (UECP). To confirm the mentioned methods experimental results were obtained testifying the possibility of using them for estimation of steels residual lifetime under non-stationary loading. The article describes : the method, that allows laboratory samples fatigue testing under the amplitudes varying according to the random law; analysis of residual lifetime is using the proposed model and LM-hardness method; creation of the analytical model, that enables to predict fatigue lifetime under the amplitudes changing according to the random law. The presented results can be used for the lifetime estimation of structural elements operating under hard load conditions with the lower error, than those of the stabilized values of inelastic deformations and the known hypotheses of fatigue damage summation.
Authors and Affiliations
Andrii Novikov, Pavlo Bulakh, Andrey Byalonovich
Keywords
Related Articles
- EP ID EP289508
- DOI 10.33108/visnyk_tntu2018.01.005
- Views 88
- Downloads 0
Structure and corrosion resistance of composite materials Cu-Mo-Zr-Y obtained by electron-beam evaporation-condencation
This research studied the structure of composite materials Cu-Mo-Zr-Y obtained by electron-beam method of evaporation-condensation. It was found that the structure is related to the chemical composition of condensate. Wh...
The generalized model of interaction of ultrasonic sh-polarization wave with 2d strain field in a plane layer
Within the framework of previously developed mathematical model of small elastic perturbations propagation in homogeneously strained elastic continuum a stationary problem for interaction of a narrow ultrasonic beam of S...
Instrument for inner cylinder surfaces vibrating rolling and its structural parameters determination technique
Design of instrument for regular topography making by vibrating rolling on inner cylinder surfaces has been developed. It provides vibrorolling effort regulation for the materials with various physical and chemical prope...
Model of nanoporous medium with charged impurities
Mathematical model of nanoporous medium with two-level process of particles mass transfer in the presence of positively charged impurities was constructed and investigated. For the considered model, the theory of the pro...
Analysis of stress intensity factors obtained with the fem for surface semielliptical cracks in the zones of structural stress concentrators
In the given article the analysis of stress intensity factors (SIF) for semielliptical surface cracks in low-alloy steel using the finite element method was conducted. The results of the distribution of stress intensity...