Abstract: Cone calorimeter and smoke density box were used to test and analyze the combustion characteristics of aircraft cargo compartment liners in different fire environments, and the fire hazard of glass fiber/phenolic resin composites was evaluated based on the experimental data of cone calorimeter. The results show that different heat radiation intensities have different effects on cargo tank linings. The greater the heat radiation intensity, the faster the thermal decomposition, the shorter the ignition time, and the greater the peak heat release rate. The maximum peak value is 98.5 kW/m2, and the maximum total heat release is 7.7 MJ/m2, and the maximum total smoke production is 0.8 m2, and the mass loss is greater. Under the same heat radiation intensity, the specific optical density of the A320 cargo tank lining composite material under flaming combustion is 2.39, and the maximum specific optical density is 16.06 in the case of flameless combustion. Combined with the CONE test data, four fire risk evaluation indicators, FGI, FPI, THRI and TSPI are calculated. FPI is inversely related to the thermal radiation intensity, and FGI, THRI and TSPI are all positive related to the thermal radiation intensity.

Key words: cargo compartment liner; combustion characteristic; glass fiber/phenolic resin; smoke density; fire hazard; heat release rate