Transient thermal stress analysis of thick-walled cylinders

Kandil, Anwar; El-Kady, Ahmed A.; El-Kafrawy, Aly

doi:10.1016/0020-7403(94)00105-s

Cited by 67 publications

(30 citation statements)

References 3 publications

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“…McNeill and Brock [16] presented a simple analytical solution for a straight pipe subjected to a linear thermal shock using discrete technique, and Marie [17] proposed an extension of this solution for any variation of the fluid temperature. Kandil [18] solved the radial temperature distribution within a cylinder under dynamic internal temperature gradient based on the finite difference technique. Shanani and Nabavi [19] considered the thermal problem of an infinite cylinder subjected to time-dependent thermal boundary condition using finite Hankel transform.…”

Section: Introductionmentioning

confidence: 99%

“…In modern industry, the heat conduction problem in pipes and pressure vessels subjected to variational thermal conditions can be described as the transient temperature field in cylinders. Although a lot of studies were conducted on transient temperature field of infinite cylinders under constant thermal boundary conditions [12][13][14][15] , only few studies involved dynamic thermal boundary conditions [16][17][18][19] . McNeill and Brock [16] presented a simple analytical solution for a straight pipe subjected to a linear thermal shock using discrete technique, and Marie [17] proposed an extension of this solution for any variation of the fluid temperature.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of transient temperature field in coke drums

Ning

Liu

2010

Appl. Math. Mech.-Engl. Ed.

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One of the primary reasons leading to bulging and cracking in a coke drum is the severe temperature gradient due to cyclic temperature variation. Based on the twodimensional heat conduction theory, an analytical solution of the transient temperature field in the coke drum is obtained, which is different from the known FEM results. The length of the coke drum is considered finite. The dynamic boundary conditions caused by fluid uninterrupted rising in oiling and watering stages are simulated with the iteration method. Numerical results show that the present theoretical model can accurately describe basic features of the transient temperature field in the coke drum. Effects of the geometry of the coke drum and the rising velocity of quench water on the axial temperature gradient are also discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of transient temperature field in coke drums

Ning

Liu

2010

Appl. Math. Mech.-Engl. Ed.

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“…This finding directly suggests using a plane stress model. Although different variations of plane stress models have been used in diverse industrial applications, such as autofrettage of gun barrels, strain-hardened pressure vessels, and multilayer seamless pipes, in the past, [48][49][50][51] they have rarely been employed in air gap thickness calculations. Especially, concerning the centrifugal casting, to the best of our knowledge, not a single match was found in the literature survey.…”

Section: Numerical Modelmentioning

confidence: 99%

Heat Transfer Coefficient at Cast-Mold Interface During Centrifugal Casting: Calculation of Air Gap

Boháček

Kharicha

Ludwig

et al. 2018

Metall Mater Trans B

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During centrifugal casting, the thermal resistance at the cast-mold interface represents a main blockage mechanism for heat transfer. In addition to the refractory coating, an air gap begins to form due to the shrinkage of the casting and the mold expansion, under the continuous influence of strong centrifugal forces. Here, the heat transfer coefficient at the cast-mold interface h has been determined from calculations of the air gap thickness d a based on a plane stress model taking into account thermoelastic stresses, centrifugal forces, plastic deformations, and a temperature-dependent Young's modulus. The numerical approach proposed here is rather novel and tries to offer an alternative to the empirical formulas usually used in numerical simulations for a description of a time-dependent heat transfer coefficient h. Several numerical tests were performed for different coating thicknesses d C , rotation rates X, and temperatures of solidus T sol . Results demonstrated that the scenario at the interface is unique for each set of parameters, hindering the possibility of employing empirical formulas without a preceding experiment being performed. Initial values of h are simply equivalent to the ratio of the coating thermal conductivity and its thickness (~1000 Wm À2 K À1 ). Later, when the air gap is formed, h drops exponentially to values at least one order of magnitude smaller (~100 Wm À2 K À1 ).

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“…Most of the studies have focused on assessing thermal stresses and also the deformation of the domain, such as the use of FGMs for controlling of thermal deformations (Wetherhold et al, 1996), the investigation of thermal stresses and deformation in shells made of FGM under thermal loads (Takezono et al, 1996;Zhang et al, 1994). Kandil et al (1995) performed a computational study on a thick-walled cylinder subjected to dynamic internal temperature gradient. They reported thermal stresses and also the temperature distribution within the cylinder wall.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical transient analysis of a thick-hollow FGM cylinder

Takabi

2016

10.5267/j.esm

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This paper presents an analytical and a numerical thermomechanical investigation of a thickwalled cylinder made of the functionally graded materials (FGMs). The hollow cylinder is subjected to a pressure and a thermal load and the properties of this material are varying across the thickness from the inner face that is a ceramic to the outer one which is a metal. After validating the current results by the analytical results, the thermomechanical behavior of the cylinder in the transient condition is investigated and the hoop and radial stresses and also temperature distribution are reported. The results reveal that the use of FG material causes a decrease in the stress; thus, it significantly improves thermomechanical behavior of the domain, thanks to using FG materials.

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Transient thermal stress analysis of thick-walled cylinders

Cited by 67 publications

References 3 publications

Analysis of transient temperature field in coke drums

Analysis of transient temperature field in coke drums

Heat Transfer Coefficient at Cast-Mold Interface During Centrifugal Casting: Calculation of Air Gap

Thermomechanical transient analysis of a thick-hollow FGM cylinder

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