Oblique nozzle loaded by the torque moment–stress state in the cylindrical shells on the pressure vessel

Petrović, Aleksandar; Balac, Martina; Jovović, Aleksandar; Dedić, Aleksandar

doi:10.1177/0954406211415907

Cited by 7 publications

(6 citation statements)

References 7 publications

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“…A sufficient agreement of the results with those obtained from 3D FEM for all cases was noted. Petrovic et al [125] considered the influence of the torque moment affecting the free end of a slanted branch on the pressure vessel cylindrical shell. The stress in the cylindrical shell was analysed on 245 models with different geometrical characteristics.…”

Section: Cylinder-cylinder Intersectionsmentioning

confidence: 99%

Junctions in shell structures: A review

Pietraszkiewicz

Konopińska

2015

Thin-Walled Structures

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Section: Cylinder-cylinder Intersectionsmentioning

confidence: 99%

Junctions in shell structures: A review

Pietraszkiewicz

Konopińska

2015

Thin-Walled Structures

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“…In this work, the finite element analysis (FEA), as an effective method to investigate the stress and structural strength of high-pressure vessels, was employed. 13–15 The aim is firstly to study the stress distributions of BTD, TLSD-RC, and TLSD-QC using the derived Mohr–Coulomb criterion and von Mises criterion for the cylinder and supporting rings, respectively. Subsequently, the pressure capacities of three types of high-pressure dies were obtained and discussed.…”

Section: Introductionmentioning

confidence: 99%

Investigation on stress distribution and pressure capacity of two-layer split high-pressure die based on finite element analysis

Zhuo

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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In order to obtain a higher pressure capacity for the high-pressure die with a larger sample cavity, two types of two-layer split dies with a round cylinder and a quadrate cylinder were designed based on the conventional belt-type die. Finite element analysis was performed to investigate the stress distributions and pressure capacities of the high-pressure dies using a derived Mohr–Coulomb criterion and the von Mises criterion for the cylinder and supporting rings, respectively. As predicted by the finite element analysis results, in the two-layer split dies with a round cylinder, the stress state of the cylinder can be only slightly improved; and the von Mises stress of the first layer supporting ring can be hardly decreased. However, in the two-layer split dies with a quadrate cylinder and sample cavity, the stress state of the cylinder can be remarkably improved. Simultaneously, the von Mises stress of the supporting rings, especially for the first-layer supporting ring, can be also effectively decreased. The pressure capacities of the two-layer split dies with a round cylinder and a quadrate cylinder are 16.5% and 63.9% higher with respect to the conventional belt-type die.

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“…The previous researches in the field [6,15,16] focused on this problem: stress and strain fields on pressure vessels with one nozzle were analysed, using analytical and numerical calculations, as well as experimental methods. Nozzles are usually positioned on cylindrical shells at angle bigger or less than 90º relative to longitudinal axis of the vessel [14,19]. Each nozzle has its constructive characteristics, as well as specific effect on cylindrical shell strength.…”

Section: Introductionmentioning

confidence: 99%

Fem analysis of pressure vessel with an investigation of crack growth on cylindrical surface

Balac¹,

Grbović²,

Petrović³

et al. 2018

Eksploatacja i Niezawodność – Maintenance and Reliability

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To ensure reliability of pressure vessels during service it is necessary to (1) know properties of materials used in their design and (2) evaluate vessels’ behaviour under different working conditions with satisfying accuracy. Due to various technical and/ or technological requirements, nozzles are usually welded on vessel’s shell producing geometrical discontinuities that reduce the safety factor. To evaluate their influence, vessels with two different nozzles were experimentally studied and critical areas for crack initiation have been identified by 3D Digital Image Correlation (DIC) method. After that, the numerical analysis of equivalent 3D finite element model was performed and obtained results were compared with experimental values. In the most critical area, next to the one of the nozzles, crack was initiated and then growth of the damage was simulated using extended finite element method (XFEM). In this paper evaluation of stress intensity factors (SIFs) along crack path is presented, as well as the most probable direction of the crack propagation on the shell. Based on SIFs values, critical length of the crack and number of pressure cycles to the final failure were estimated.

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Oblique nozzle loaded by the torque moment–stress state in the cylindrical shells on the pressure vessel

Cited by 7 publications

References 7 publications

Junctions in shell structures: A review

Junctions in shell structures: A review

Investigation on stress distribution and pressure capacity of two-layer split high-pressure die based on finite element analysis

Fem analysis of pressure vessel with an investigation of crack growth on cylindrical surface

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