Abstract： To find the densification rules of warm compaction of wood powders, based on experimental data of warm compaction of poplar powders, the finite element method was applied to analyze the influence of forming pressure on green density of wood powders. The methods of theoretical calculation and experimental verification were combined to make a regression analysis of the relationship between forming pressure and green density. The results show that Shima model is particularly fit for numerical simulation on warm compaction of poplar powders and quite matches the experimental results. The simulating results under the process condition of warm compaction obviously deviate from the experimental results. A pressure-density model of warm compaction of poplar powders is obtained by theoretical calculation, experimental detection and correction analysis, which is composed of a theoretical equation and a correction term. The model is particularly consistent with the experimental results when the forming pressure is not less than 50 MPa.

Keywords: poplar powder; warm compaction; densification; numerical simulation