Application of Paris' law under variable loading

Bulatovic, Srdjan M.; Aleksić, Vujadin; Milović, Ljubica; Zečević, Bojana

doi:10.5937/fme2201072b

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…This knowledge forms a cornerstone for comprehending interface crack behavior and its progression under cyclic loading, shedding light on the complex interplay of mechanical forces and material characteristics. They also established that the crack propagation rate is the linear function of the stress intensity factor variation in the logarithmic form, i.e., [31][32][33][34]:…”

Section: Problem Formulationmentioning

confidence: 99%

Prediction of the Crack Front Shape of the Corner Interface Crack

Djoković,

Nikolić,

Pastorková

et al. 2023

Applied Sciences

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This study delves into the analysis of interface crack propagation originating from a right-angle corner along the bonding plane between the two plates composed of dissimilar materials. The research explores three distinct crack front shapes: concave, triangular, and convex (quarter-circle). The obtained results, meticulously presented in this paper, offer valuable insights into the nature of the crack propagation along these geometries. The findings elucidate that in the case of a convex crack front, the edges demonstrate a significantly accelerated propagation compared to the rest of the crack front. Conversely, for the triangular and concave crack fronts, the central region experiences faster propagation compared to the edges. These revelations lead to a generalized conclusion regarding the stability of different crack front shapes, highlighting the triangular crack front as the most stable configuration in this context. The implications of these observations provide essential knowledge for understanding and managing crack propagation in composite structures, offering potential applications in various engineering domains.

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Section: Problem Formulationmentioning

confidence: 99%

Prediction of the Crack Front Shape of the Corner Interface Crack

Djoković,

Nikolić,

Pastorková

et al. 2023

Applied Sciences

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Determining of the Fatigue Crack Growth Rate of HSLA Steel at Room Temperature

et al. 2022

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Welded joint is a critical region of a welded structure and fracture mechanics analysis is inevitable in the structural integrity assessment of all welded structures. This paper shows the determining of parameters of the fatigue crack for constituents of welded joints produced of high strength low alloyed steel. The applied methodology refers to the Paris relation where the link was established between the variable load quantity or the corresponding stress intensity factor range and crack growth per cycle. Results have shown that the position of the notch and crack initiation affect the values of the stress intensity range of fatigue threshold ΔKth and parameters in the Paris’ equation. This is mostly expressed when determining growth parameters of the fatigue crack in heat affected zone of HSLA steel, where different changes of growth speed of the fatigue crack clearly express differences in structure of the crack pass.

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Numerical Determination of the Life of Steel Exposed To Low Cycle Fatigue

Aleksić,

Bulatović,

Zečević

et al. 2023

Adv.Tech&Mat.

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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 (/2 = const, R = min/max = -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).

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Application of Paris' law under variable loading

Cited by 3 publications

References 15 publications

Prediction of the Crack Front Shape of the Corner Interface Crack

Prediction of the Crack Front Shape of the Corner Interface Crack

Determining of the Fatigue Crack Growth Rate of HSLA Steel at Room Temperature

Numerical Determination of the Life of Steel Exposed To Low Cycle Fatigue

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