Prefabricated crack propagation in translucent alumina ceramic sheets during flame thermal shock

The prefabricated cracks propagation of ceramic under flame thermal shock was studied by real-time observation. experimental results show that wing are generated from both tips the crack, and complete failure samples is a high-speed process. crack speed fast at first then gradually slows down. maximum near tip increases with distance to heated surface, while an inverse trend observed for far tip. effect angle on also considered. In addition, numerical simulations based dynamic fracture mechanics were carried out reproduce entire cracking To this end, relation between stress intensity factors growth in range 100 m/s 2600 identified combing experiments simulations. simulation above-mentioned consistent observations. model can faithfully evolution process shock, which difficult observe experiment due high