Effect of material parameters on thermal shock crack of ceramics calculated by phase‐field method
Effect of material parameters on thermal shock crack of ceramics calculated by phase‐field method
复制标题
相场法计算材料参数对陶瓷热震裂纹的影响
DOI：
10.1111/jace.18720
复制
发表时间：
2022
影响因子：
3.9
通讯作者：
Fan Song
中科院分区：
文献类型：
--
作者：
Chuandong Zuo;Qingxiang Li;Qian Wang;Yuqiao Li;Long Li;Jiachen Wei;Y. Shao;Fan Song
以氧化铝陶瓷为研究对象，采用相场法研究了热导率、比热容、密度、热膨胀系数、杨氏模量和断裂韧性对热冲击裂纹的影响。结果表明，提高材料的导热系数和断裂韧性可以降低热震损伤。即，长裂纹长度变短，或者裂纹密度变小。然而，增加热膨胀系数和杨氏模量将增加热冲击损伤。这与以往的热冲击理论是一致的。考虑了材料参数对裂纹扩展速度的影响。此外，我们进行了氧化锆的热冲击试验。相场计算的结果与氧化锆的热冲击结果相同。本文验证了相场法适用于模拟其他陶瓷中的热冲击裂纹。
Based on alumina ceramics, we employ the phase‐field method to study the effects of thermal conductivity, specific heat, density, thermal expansion coefficient, Young's modulus, and fracture toughness on thermal shock cracks. The results show that increasing thermal conductivity and fracture toughness will reduce thermal shock damage. That is, the long crack length becomes shorter, or the crack density becomes smaller. However, increasing the thermal expansion coefficient and Young's modulus will increase thermal shock damage. It is consistent with the previous thermal shock theory. The effect of material parameters on crack propagation speed was also considered. In addition, we carried out a thermal shock test of the zirconia. The results of the phase‐field calculation are the same as the thermal shock results of the zirconia. This paper verifies that the phase‐field method is suitable for simulating thermal shock cracks in other ceramics.