NUMERICAL PREDICTION ON THE FIRST BREAKING TIME OF GLASS IN FIRE CONDITIONS

Window glass breaks and even falls out in fire conditions when thermal stress induced by heating exceeds the critical breaking stress. The breakage of glass under fire conditions will cause further fire spreading to other regions, which increases the fire risk. In this paper, one-dimensional equation of heat conduction was solved using the finite element method, and the first breaking time of glass under three typical thermal loadings (thermal radiation, compartment fire, urban/wildland interface fire) was investigated by adopting criteria of temperature difference. The applicability of the model and reliability of the code were verified by comparing the numerical results with the experimental results and previous calculations.