Modeling of fracture of cracked structural elements with the use of probabilistic methods

Varfolomeev, Igor; Yasnii, O. P.

doi:10.1007/s11003-008-9047-5

Cited by 6 publications

(2 citation statements)

References 11 publications

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“…1b) and at the point on the surface of the semi-elliptical crack in the hollow cylinder was calculated according to the data of Carpinteri [31]. The SIF range for mode I at points A and C was calculated by the formula using the approach proposed in the paper [32]. The assumptions about the unknown mean and standard deviation were tested and accepted according to Anderson-Darling's test [35].…”

Section: Modeling Of Surface Fatigue Crack Growth and Residual Lifeti...mentioning

confidence: 99%

Effect of the defect initial shape on the fatigue lifetime of a continuous casting machine roll

Yasniy

Lapusta

2016

Comptes Rendus. Mécanique

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The article deals with the influence of the defect initial shape on the residual lifetime of a continuous casting machine roll made of 25Cr1MoV steel. Based on this approach, previously proposed by some authors, the growth of the surface fatigue crack was modeled in a roll under loading and temperature conditions that are close to operational ones, taking into account the statistical distribution of the C parameter of Paris' equation. Dependencies of the continuous casting machines roll fatigue lifetime on the initial defect shape and critical defect sizes are obtained.

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Section: Modeling Of Surface Fatigue Crack Growth and Residual Lifeti...mentioning

confidence: 99%

Effect of the defect initial shape on the fatigue lifetime of a continuous casting machine roll

Yasniy

Lapusta

2016

Comptes Rendus. Mécanique

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“…We approximated the experimental data by the least squares method and determined the distribution parameters of . The assumptions about distribution function were verified by Anderson-Darling (A-D) test according to methods proposed in Varfolomeev and Yasniy, 2008. The statistical value of this criterion is calculated as…”

Section: Introductionmentioning

confidence: 99%

Probabilistic modeling of surface crack growth in a roll of continuous casting machine

2011

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A methodology to determine the residual lifetime of continuous caster machine roll is developed. The roll is modeled as a thick-walled cylinder with a semielliptical crack. The study takes into account the statistical variation of the characteristics of cyclic crack resistance under operating conditions. The procedure enables to determine the parameters of acceptable distribution of crack depth for a given number of stress cycles and the distribution of durability for a given allowable depth of crack.Keywords: residual lifetime, fatigue crack growth, semi-elliptical crack, continuous caster roll, probabilistic modeling 1. Introduction. During their operation, rolls of continuous casting machines (CCM) and hot rolling equipment undergo cyclic thermo-mechanical loading. This leads to emergence and growth of multiple surface cracks which often form networks (Mercado-Solis and Beynon, 2005, Colas et al, 1999. The roll lifetime is mainly limited by the thermo-fatigue growth of surface cracks up to a critical size. It therefore depends on the properties of roll material, the cyclic mechanical loading and temperature changes, casting speed, and other factors. The influence of the loading frequency and waveform on the fatigue crack growth rate of caster rolls materials were studied in e.g. Yasniy et al. (2006). For example, if the loading frequency decreases from 0,1 Hz to 0,01 Hz and the temperature changes from 20 o C to 600 o C, with equal J-integral range values J f , the FCG rate in a 25Cr1Mo1V steel decreases significantly. Also, frequency effects are more important with smaller values of J f . A similar effect, consisting in a FCG rate reduction with a

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On Thermally Induced Multiple Cracking of a Surface: An Experimental Study

et al. 2013

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Modeling of fracture of cracked structural elements with the use of probabilistic methods

Cited by 6 publications

References 11 publications

Effect of the defect initial shape on the fatigue lifetime of a continuous casting machine roll

Effect of the defect initial shape on the fatigue lifetime of a continuous casting machine roll

Probabilistic modeling of surface crack growth in a roll of continuous casting machine

On Thermally Induced Multiple Cracking of a Surface: An Experimental Study

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