Thermal Shock Cracking Behavior of a Cylinder Specimen with an Internal Penny-Shaped Crack Based on Non-Fourier Heat Conduction

Guo, Songlin; Wang, Baolin

doi:10.1007/s10765-015-2029-6

Cited by 15 publications

(3 citation statements)

References 37 publications

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“…Charring material such as phenolic-impregnated carbon ablators is one successful class of TPS materials [2][3][4], and its thermo-physical parameters are crucial for the design of the TPS [5][6][7]. When simulating the thermal response of the charring material, the thermo-physical parameters are indispensable no matter what method we use [8][9][10][11]. Currently, thermal conductivity of the pyrolysis layer is usually approximated by the linear interpolation of that in the virgin layer and in the char layer, respectively, when using the pyrolysis layer model to simulate the thermal response of the charring material [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…with the alumina insulating firebrick; therefore, the heat conduction is assumed to be one-dimensional. During the experiment, the air pressure is controlled by the pneumatic control system, consisting of the air inlet (5), the air outlet (6), the pneumatic valve (7) and the vacuum tank(8). The air flows into this experimental equipment by air inlet and flows out by air outlet.…”

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confidence: 99%

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Measuring method for thermal conductivity of a pyrolysis layer

Guo

Huang

Wang

et al. 2019

Polymer Degradation and Stability

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Measuring method for thermal conductivity of a pyrolysis layer

Guo

Huang

Wang

et al. 2019

Polymer Degradation and Stability

View full text Add to dashboard Cite

show abstract

“…Kırılma mekaniğinde tanımlanmış KIII gerilme şiddeti çarpanının belirlenmesi problemi, burulma etkisi altındaki deney modelinde üç boyutlu bir çatlak için gerilmelerin dondurulması yöntemi ile fotoelastik olarak çalışılmıştır [7]. Diğer bir çalışmada, silindir üzerinde oluşması varsayılan bir çatlak civarında ani sıcaklık değişimi durumunun oluşturduğu etki incelenmiştir [8]. İnce bir film ile ortotrop kaplama ara yüzeyi üzerindeki çatlak, düzgün ısı akışı altında analiz edilmiştir [9].…”

Section: Gi̇ri̇ş (Inroduction)unclassified

Reaktör Gövdesinde Kullanılan Kompozit Levhalardaki Kusurlar Civarında Termal Gerilme Analizi

Bulut

2018

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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Modelling of composite plate using in the reactor body in nuclear energy plants for thermal effect  The analysis of the stress concentration factor at the crack tip which is perpendicular to the interface of two different materials for various geometries and positions  Modelling by using finite element method which was verified analyticallyThe finite element model of the nuclear wall near the cavity perpendicular to the interface, verification of numerical results with analytical solution, variation of the stress concentration factor with respect to the radius of the tip of the cavityPurpose: In this study, the variation of the thermal stress concentration factor was intended to be determined with respect to the radius and the location of the tip of a cavity, which is perpendicular to the interface of two materials having different coefficients of thermal expansion. Theory and Methods:The dimensions of the region including a small cavity is small with respect to those of the reactor composite body so that this region can be modeled by a plate. The difference between the coefficients of thermal expansion was modeled by different temperature on two regions of a single material plate. The numerical model, which was analyzed by Abaqus, was verified by an analytical solution given in the literature. Various geometries of the numerical model were analyzed varying the radius and the location of the tip of the cavity. Results:The variations of the stress concentration factor were obtained with respect to the variations of the radius and location of the tip of the cavity, separately. Furthermore, second degree parabolas were fitted to the results in order to obtain the stress concentration factor when the radius or the distance of the tip to the interface equal to zero. Conclusion:The analogical approach was applied successfully to the numerical model considered here. The verification of the numerical model for the analysis of thermal stress was presented, which can be used to obtain an empirical expression for calculation of the thermal stress concentration factor comparing with some of the experiments in future.

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Prediction of thermal conductivity of pyrolysis layer by thermogravimetry data

Guo

Huang

2019

J of Applied Polymer Sci

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Thermal conductivity of the pyrolysis layer in the charring material is of great importance for the optimal design of thermal protection system (TPS) in reentry vehicles. A method based on the thermogravimetry data of the charring material is presented to predict the thermal conductivity of the pyrolysis layer and the distribution of thermal conductivity of the pyrolysis layer is estimated. In addition, in order to validate the accuracy of this method, thermal response of the charring material is calculated with the predicted thermal conductivity and compared with the experimental data. The simulation results agree with the measured data and the numerical results indicate that taking this method to calculate the thermal conductivity of the pyrolysis layer is more compatible with the actual situation. This study is helpful to the optimization of the TPS. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48346.

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Thermal Shock Cracking Behavior of a Cylinder Specimen with an Internal Penny-Shaped Crack Based on Non-Fourier Heat Conduction

Cited by 15 publications

References 37 publications

Measuring method for thermal conductivity of a pyrolysis layer

Measuring method for thermal conductivity of a pyrolysis layer

Reaktör Gövdesinde Kullanılan Kompozit Levhalardaki Kusurlar Civarında Termal Gerilme Analizi

Prediction of thermal conductivity of pyrolysis layer by thermogravimetry data

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