Published 2023-12-18
abstract views: 155 // Full text article (PDF): 80
Keywords
- Steel,
- LFC,
- Lifetime,
- Numerical methods
How to Cite
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Abstract
In the paper, based on the results of the experimental research of high-strength low-alloy steel(HSLA), Nionicral 70 (NN-70), under conditions of low-cycle fatigue (LCF), a numerical analysis of stress and determination of the life of steel samples was performed. Experimental testing of the behavior of the samples were performed with controlled and fully reversible strain (Δε/2 = const, Rε = εmin/εmax = -1), according to the standard ISO 12106:2003 (E). For computational analyses, the following were used: the method of least squares and the method of finite elements (FEM). On the basis of the analysis of the results of the stress-deformation state and the determination of the life span through the isolines of the life span and comparison with the results of experimental tests, a graphic representation is given. The analysis justified the effort to numerically solve the estimation of the lifespan of steel under low cycle fatigue (LCF).