A comparative analysis of reticular crack on ceramic plate driven by thermal shock

Xu, Xianghong; Sheng, ShiLong; Tian, Cheng; Yuan, Wenqiang

doi:10.1007/s11433-016-0098-2

Sci. China Phys. Mech. Astron.

2016

DOI: 10.1007/s11433-016-0098-2

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A comparative analysis of reticular crack on ceramic plate driven by thermal shock

Xianghong Xu

ShiLong Sheng

Cheng Tian

et al.

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Cited by 4 publications

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“…Several heat sources have been used in thermal fatigue tests, such as high-frequency induction [7], quartz lamps [8], muffle furnaces [9], and continuous wave lasers [10,11]. However, owing to the intrinsic limitations of the above methods, the superimposed HCF thermal loading within milliseconds is difficult to achieve.…”

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confidence: 99%

Experimental and numerical study of thermal fatigue behavior under variable amplitude induced by pulsed laser

Pan

et al. 2018

Sci. China Phys. Mech. Astron.

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mentioning

confidence: 99%

Experimental and numerical study of thermal fatigue behavior under variable amplitude induced by pulsed laser

Pan

et al. 2018

Sci. China Phys. Mech. Astron.

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Analysis of 3D crack patterns in a free plate caused by thermal shock using FEM-bifurcation

et al. 2023

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Damage to components made of brittle material due to thermal shock represents a high safety risk. Predicting the degree of damage is therefore very important to avoid catastrophic failure. An energy-based linear elastic fracture mechanics bifurcation analysis using a three-dimensional finite element model is presented here, which allows the determination of crack length and crack spacing for a defined thermal load in a free plate. It is assumed that a hierarchical crack pattern is formed due to cooling penetration. The constant growth of the ideal regular pattern of hexagons can change into a pattern with a different symmetry by slightly changing the cooling conditions. This bifurcation point is determined by the second derivative of the mechanical potential with respect to the geometry of the crack front. The very high computational effort for the second derivative is reduced by describing the three-dimensional crack front with a limited number of Fourier coefficients. A one-dimensional transient temperature field at a sufficient distance from the plate edge is assumed. For alumina, the crack length and crack spacing curves are computed for different quenching temperatures and heat transfer coefficients. The corresponding final crack lengths are also calculated as a measure of damage. Comparison with a two-dimensional model confirms the expected 1/2 difference in crack spacing. Data from thermal shock experiments are also presented. However, due to the cracks caused by the strong cooling at the edge, these correspond to the results of the two-dimensional model.

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Ultrahigh‐temperature tensile behaviors of ZrB₂–SiC ceramics

Cheng,

Lv,

Nie

2024

Int J Applied Ceramic Tech

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ZrB2–SiC ceramics are the potential candidates for the ultrahigh‐temperature thermal protection materials of sharp‐bodied reentry and hypersonic vehicles. However, their ultrahigh‐temperature mechanical behaviors have been rarely reported. In the present work, an ultrahigh‐temperature testing method for the tensile properties of ceramics is proposed. The tensile behaviors of ZrB2–20 vol% SiC are studied up to 1950°C in air and to 2050°C in nitrogen atmosphere for the first time. The tensile stress–strain curves, Young's modulus, and tensile strength are obtained. The microstructure evolutions, including crystallization of sintering aids, grain recombination, and grain oxidation, are observed, and their effects on the tensile properties are analyzed. The mechanisms controlling the tensile behaviors at ultrahigh temperatures are revealed. The maximum operating temperature of ZrB2–SiC ceramics has been identified.

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A comparative analysis of reticular crack on ceramic plate driven by thermal shock

Cited by 4 publications

References 13 publications

Experimental and numerical study of thermal fatigue behavior under variable amplitude induced by pulsed laser

Experimental and numerical study of thermal fatigue behavior under variable amplitude induced by pulsed laser

Analysis of 3D crack patterns in a free plate caused by thermal shock using FEM-bifurcation

Ultrahigh‐temperature tensile behaviors of ZrB₂–SiC ceramics

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A comparative analysis of reticular crack on ceramic plate driven by thermal shock

Cited by 4 publications

References 13 publications

Experimental and numerical study of thermal fatigue behavior under variable amplitude induced by pulsed laser

Experimental and numerical study of thermal fatigue behavior under variable amplitude induced by pulsed laser

Analysis of 3D crack patterns in a free plate caused by thermal shock using FEM-bifurcation

Ultrahigh‐temperature tensile behaviors of ZrB2–SiC ceramics

Contact Info

Product

Resources

About

Ultrahigh‐temperature tensile behaviors of ZrB₂–SiC ceramics