Prediction of failures in steam boiler using quantification of residual stresses

Pástor, Miroslav; Lengvarský, Pavol; Trebuňa, František; Čarák, Peter

doi:10.1016/j.engfailanal.2020.104808

Cited by 17 publications

(10 citation statements)

References 16 publications

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“…In the development of the unique drilling device, the authors used their own experiences obtained from using commercially produced devices SINT MTS 3000 (SINT Technology, Calenzano, Italy), SINT MTS 3000 Ring-Core (SINT Technology), and RS 200 (Vishay Precision Group, Malvern, PA, USA) not only in laboratory conditions but also by solving problems in technical practice [ 22 , 23 , 24 ]. The common feature of the aforementioned devices is adjusting the position of the milling cutter in the center of the strain gauge rosette.…”

Section: Development and Testing Of The Unique Hole-drilling Devicmentioning

confidence: 99%

Design of a Unique Device for Residual Stresses Quantification by the Drilling Method Combining the PhotoStress and Digital Image Correlation

et al. 2021

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This paper presents a uniquely designed device combining the hole-drilling technique with two optical systems based on the PhotoStress and digital image correlation (DIC) method, where the digital image correlation system moves with the cutting tool. The authors aimed to verify whether the accuracy of the drilled hole according to ASTM E837-13a standard and the positioning accuracy of the device were sufficient to achieve accurate results. The experimental testing was performed on a thin specimen made from strain sensitive coating PS-1D, which allowed comparison of the results obtained by both methods. Although application of the PhotoStress method allows analysis of the strains at the edge of the cut hole, it requires a lot of experimenter’s practical skills to assess the results correctly. On the other hand, the DIC method allows digital processing of the measured data. However, the problem is not only to determine the data at the edge of the hole, the results also significantly depend on the smoothing levels used. The quantitative comparison of the results obtained was performed using finite element analysis.

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Section: Development and Testing Of The Unique Hole-drilling Devicmentioning

confidence: 99%

Design of a Unique Device for Residual Stresses Quantification by the Drilling Method Combining the PhotoStress and Digital Image Correlation

et al. 2021

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“…Knowledge and consideration of residual stresses is extremely important, especially in welded structures in which they occur mainly due to significant temperature effects in the area around the weld and subsequent uneven cooling. Residual stresses in a structure can arise not only during its production but also during repairs or as a result of possible overload [ 21 , 22 , 23 , 24 , 25 , 26 ]. These stresses are superimposed on stresses from the operating load, which can reduce, sometimes substantially, safety and reliability of the load-bearing element and thus of the entire structure.…”

Section: Determination Of Residual Stresses On Sluice Gatementioning

confidence: 99%

Experimental and Numerical Analysis of 60-Year-Old Sluice Gate Affected by Long-Term Operation

et al. 2020

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Technological units of water reservoirs and power plants include sluice gates which are designed to completely seal the inflow or outflow of water in supply or discharge channels. This article describes the issue of technical assessment of a sluice gate made in the 1950s. Such structures are characterised by states of significant corrosive wear, permanent deformations of contact and sealing surfaces as well as increased levels of residual stresses. In such cases, it is difficult to determine service life using only numerical modelling methods, mainly due to problematic definition of material properties and boundary conditions. Therefore, for safety assessment, it is necessary to verify these facts experimentally. This article presents the procedure for assessing safe operation of the sluice gate on which places with permanent deformation and a broken part of the guide wheel flange were identified. By means of numerical modelling, we identified critical stress values at the locations of reinforcing elements, which were modified, and the stress values were reduced by about 15%. The results of numerical modelling were verified at select locations by experimental measurements during operation using strain gauges. The maximum values of operational normal stresses in the assessed places reached about 27 MPa. Based on the comparison of obtained results and taking into account values of residual stresses reaching up to 190 MPa made by shielded metal arc welding, it can be stated that, for safe operation of the sluice gate, it is necessary to follow the proposed procedure during its lowering and to modify the reinforcing elements structurally.

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“…Over the last few years, some researchers have attempted to identify the causes of boiler accidents and provided guidelines of safe boiler operations ( Park et al., 2020 ; Pastor et al., 2020 ; Deghal et al., 2019 ; Trojan, 2019 ; Hong et al., 2019 ; Huang et al., 2019 ). Park et al.…”

Section: Introductionmentioning

confidence: 99%

“…The results revealed that bio liquid is reliable and safe for fire tube boilers in terms of low emissions and reduced boiler accidents. Pástor et al. (2020) used quantification of residual stresses to identify the possible causes of the boiler's pipe failure.…”

Section: Introductionmentioning

confidence: 99%

Modelling the causes of boiler accidents: implications for economic and social sustainability at the workplace

Rahman

Karmaker²,

Ahmed³

et al. 2022

Heliyon

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Prediction of failures in steam boiler using quantification of residual stresses

Cited by 17 publications

References 16 publications

Design of a Unique Device for Residual Stresses Quantification by the Drilling Method Combining the PhotoStress and Digital Image Correlation

Design of a Unique Device for Residual Stresses Quantification by the Drilling Method Combining the PhotoStress and Digital Image Correlation

Experimental and Numerical Analysis of 60-Year-Old Sluice Gate Affected by Long-Term Operation

Modelling the causes of boiler accidents: implications for economic and social sustainability at the workplace

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