One dimensional transient thermoelastic and associated fracture analysis of long porous ceramic plate

The article presents a comprehensive analysis of the thermal shock behavior of porous ceramic materials, focusing on their application in thermal protection systems for hypersonic aircraft. It begins by highlighting the excellent properties of porous ceramics, such as low thermal conductivity and high thermal shock resistance. The authors then delve into the challenges posed by severe thermal shock due to high temperatures and temperature gradients, which can lead to catastrophic damage. The study reviews previous research on thermal stress and thermal shock behaviors of porous ceramics, emphasizing the influence of particle size, porosity, and thermal shock conditions. The main novelty of the work lies in the establishment of a systematic theoretical methodology to understand the thermal shock behavior of porous ceramics under asymmetric thermal shock. The methodology involves deriving temperature and thermal stress fields in crack-free porous ceramics using variable separation and constitutive equations. Thermal stress fields at the crack tip are obtained using the weight function method, and the relationship between thermal shock resistance and non-dimensional crack length is analyzed. The article concludes by discussing the thermal shock resistances of porous ceramic materials, providing valuable insights into their mechanical performance under extreme thermal conditions.