Modeling thermal shock damage in refractory materials via direct numerical simulation (DNS)

Özdemir, İzzet; Brekelmans, Wam Marcel; Geers, Mgd Marc

doi:10.1016/j.jeurceramsoc.2009.12.014

Cited by 18 publications

(7 citation statements)

References 25 publications

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“…The Finite Element method is a numerical procedure commonly employed for approximate solutions of demanding thermomechanical problems than cannot be treated by analytical techniques [23][24][25][26][27][28]. In this study, a finite element procedure employing Lagrange elements of bilinear interpolation for the discretization of the temperature filed and biquadratic interpolation for the displacement fields is employed ( figure 8).…”

Section: Finite Element Solutionmentioning

confidence: 99%

Thermo-mechanical response FEM simulation of ceramic refractories undergoing severe temperature variations

Papathanasiou

Corso

2016

Journal of the European Ceramic Society

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The development of thermal stresses inside refractory ceramics experiencing severe thermal shock is studied. The present analysis departs from the linear theory of thermal stresses as it accounts for temperature dependent thermal and mechanical material properties. Radiation surface heat exchange between the refractory component and its surroundings is included. A Finite Element Procedure is presented and a MATLAB code is developed. The nonlinear heat equation is solved for the temperature field and this solution is subsequently used in order to determine the stress field evolution. The finite element code is validated and used for the thermal shock estimation of a refractory brick. Material properties corresponding to Al 2 O 3 are selected. A thermal cycle consisting of a heating stage followed by cooling down is simulated. The results are compared with those predicted by the linear thermal stresses theory and significant deviations are observed for the examined values of the Biot number.

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Section: Finite Element Solutionmentioning

confidence: 99%

Thermo-mechanical response FEM simulation of ceramic refractories undergoing severe temperature variations

Papathanasiou

Corso

2016

Journal of the European Ceramic Society

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“…Observations of alumina microstructure after thermal shock by Özdemir et al . showed that microcracking occurs along the boundaries of large grains while the grains themselves remain intact.…”

Section: Multis‐cale Modeling Of Alumina Ceramics Under Laser Heatingmentioning

confidence: 99%

“…Observations of alumina microstructure after thermal shock by € Ozdemir et al 17 showed that microcracking occurs along the boundaries of large grains while the grains themselves remain intact. In addition to experimental investigations, analytical studies on simplified material systems by Evans and Fu 18 revealed that above a critical grain size, the cracking occurs along grain interfaces upon a uniform temperature change.…”

Section: Multis-cale Modeling Of Alumina Ceramics Under Laser Heamentioning

confidence: 99%

Coupled Thermomechanical Multiscale Modeling of Alumina Ceramics to Predict Thermally Induced Fractures Under Laser Heating

Dong

Shin

2014

J. Am. Ceram. Soc.

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This study is concerned with thermally induced fractures and failure of high weight percentage alumina ceramics. A 3D coupled thermomechanical multiscale model has been developed to simulate thermally induced fractures. In laser heating of alumina ceramics, the temperature and stress distributions have been predominantly correlated with the interfacial glass phase within alumina microstructure. A coupled thermomechanical analysis with traction–separation law has been implemented in the finite element framework as a cohesive zone model (CZM). The alumina grains are modeled as thermomechanical continuum elements separated by CZM. A thermal and mechanical analysis has been conducted using Molecular Dynamics methods to obtain the thermal conductivities and parameterize traction–separation laws for the interface of alumina ceramics at different temperatures. The coupled thermal‐mechanical analysis achieved through a finite element model in Abaqus is compared with experimental results in laser‐heating tests. The model is successful in predicting temperature distributions and thermal fractures, which could help assist in selecting proper conditions in alumina applications and fabrication processes.

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“…Later on, they were utilized for analyzing damage during thermal cycles [12] and fracture [13] in various refractories. The same models may also be used to study interface cohesion in such heterogeneous materials [14,15,16]. More recently, several examples are found about its usage to simulate initiation and propagation of macrocracks [17,18,19,20,21,22].…”

Section: Introductionmentioning

confidence: 99%

“…Some of them briefly comment on parameter calibration without giving many details [12,13,14]. For the quantity to be optimized with respect to experimental information, the crack mouth opening displacement (CMOD) [11,17] or elastic properties obtained from acoustic measurements [15,17] can be used. More recently, inverse algorithms were used to find the best fit of the loading curve [18,19].…”

Section: Introductionmentioning

confidence: 99%

On the calibration of cohesive parameters for refractories from notch opening displacements in wedge splitting tests

Vargas

Canto

Hild

2021

Journal of the European Ceramic Society

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Modeling thermal shock damage in refractory materials via direct numerical simulation (DNS)

Cited by 18 publications

References 25 publications

Thermo-mechanical response FEM simulation of ceramic refractories undergoing severe temperature variations

Thermo-mechanical response FEM simulation of ceramic refractories undergoing severe temperature variations

Coupled Thermomechanical Multiscale Modeling of Alumina Ceramics to Predict Thermally Induced Fractures Under Laser Heating

On the calibration of cohesive parameters for refractories from notch opening displacements in wedge splitting tests

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