Numerical Simulation for Thermal Shock Resistance of Ultra-High Temperature Ceramics Considering the Effects of Initial Stress Field | Zendy

Weiguo Li | Zendy; Tianbao Cheng | Zendy; Dingyu Li | Zendy; Daining Fang | Zendy

Open Access

Numerical Simulation for Thermal Shock Resistance of Ultra-High Temperature Ceramics Considering the Effects of Initial Stress Field

Author(s) -

Weiguo Li,

Tianbao Cheng,

Dingyu Li,

Daining Fang

Publication year - 2011

Publication title -

advances in materials science and engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.356

H-Index - 42

eISSN - 1687-8442

pISSN - 1687-8434

DOI - 10.1155/2011/757543

Subject(s) - materials science , thermal shock , ceramic , shock (circulatory) , tension (geology) , stress (linguistics) , composite material , constraint (computer aided design) , mechanics , mechanical engineering , compression (physics) , physics , engineering , medicine , linguistics , philosophy

Taking the hafnium diboride ceramic as an example, the effects of heating rate, cooling rate, thermal shock initial temperature, and external constraint on the thermal shock resistance (TSR) of ultra-high temperature ceramics (UHTCs) were studied through numerical simulation in this paper. The results show that the external constraint has an approximately linear influence on the critical rupture temperature difference of UHTCs. The external constraint prepares a compressive stress field in the structure because of the predefined temperature field, and this compressive stress field relieves the tension stress in the structure when it is cooled down and then it improves the TSR of UHTCs. As the thermal shock initial temperature, a danger heating rate (or cooling rate) exists where the critical temperature difference is the lowest

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