燃烧条件下格构增强泡桐木夹芯板热传导模型

The unidirectional lattice reinforced paulownia wood sandwich board was studied in the fire test, and its one-dimensional heat conduction model was established. The finite difference method was used to compare the calculated results of the heat conduction model with the experimental results. It shows that the two results are in good agreement. According to the fire test and finite element simulation of sandwich panels, it is found that the sandwich plate has obvious temperature gradient along the thickness direction in different time periods. When the exposure time is larger than 60min, the heat decomposition of skins and core materials occurs, meanwhile the heat transfer is blocked due to the charring effects. Moreover, the influence of core material on lattice performance is verified by analyzing the temperature change of core material and lattice structure during heating process.