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Crack patterns corresponding to the residual strength plateau of ceramics subjected to thermal shock
Hou HL; Wu XF; Yan P; Song F(宋凡); Li J; Jiang CP; Jiang, CP; Beihang Univ, Sch Aeronaut Sci & Engn, Beijing 100191, Peoples R China.
Source PublicationACTA MECHANICA SINICA
2012-06-01
Volume28Issue:3Pages:670-674
ISSN0567-7718
AbstractThe formation mechanism of the residual strength plateau of ceramics subjected to thermal shock is addressed. A set of thermal shock experiments of 99Al(2)O(3) are conducted, where the thin specimens of 1 mmx10 mmx50 mm exhibit parallel through edge cracks, and thus permit quantitative measurements of the crack patterns. The cracks evolve with the severity of thermal shock. It is found that there is a correlation between the length and density of the thermal shock cracks. The increase of crack length weakens the residual strength, whereas the increase of crack density improves it. In a considerably wide temperature range, the two contrary effects just counteract each other;consequently a plateau appears in the variation curve of the residual strength. A comparison between the numerical and experimental results of the residual strength is made, and they are found in good agreement. This work is helpful to a deep understanding of the thermal shock failure of ceramics.
KeywordCeramics Thermal Shock Crack Patterns Residual Strength Stress Intensity Factor Functionally Graded Ceramics Propagation Behavior Fracture
Subject Area极端条件下的材料和结构
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Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000306214300012
Funding OrganizationThe project was supported by the National Natural Science Foundations of China (10972020, 11061130550), the Fundamental Research Funds for the Central Universities and the National Agency for Research of France (International project T-shock).
DepartmentLNM生物材料微结构和力学性能
Classification二类
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46686
Collection非线性力学国家重点实验室
Corresponding AuthorJiang, CP; Beihang Univ, Sch Aeronaut Sci & Engn, Beijing 100191, Peoples R China.
Recommended Citation
GB/T 7714
Hou HL,Wu XF,Yan P,et al. Crack patterns corresponding to the residual strength plateau of ceramics subjected to thermal shock[J]. ACTA MECHANICA SINICA,2012,28(3):670-674.
APA Hou HL.,Wu XF.,Yan P.,Song F.,Li J.,...&Beihang Univ, Sch Aeronaut Sci & Engn, Beijing 100191, Peoples R China..(2012).Crack patterns corresponding to the residual strength plateau of ceramics subjected to thermal shock.ACTA MECHANICA SINICA,28(3),670-674.
MLA Hou HL,et al."Crack patterns corresponding to the residual strength plateau of ceramics subjected to thermal shock".ACTA MECHANICA SINICA 28.3(2012):670-674.
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