摘要
为探寻木质粉末热压成形致密化规律,基于杨木粉末与芦苇粉末热压成形实验数据,借助有限元法分析成形压力对其压坯密度的影响,并通过理论计算与实验验证相结合的方法对成形压力与压坯密度的关系进行回归分析。结果表明:在热压工艺条件下,依据Shima模型的计算数据与实验结果存在明显偏差,但当成形压力不小于50 MPa时,通过理论计算、实验检测与分析修正获得的由理论方程与修正项组成的杨木粉末和芦苇粉末的热压成形"压力-密度"模型与实验结果高度吻合。
To find the densification rules of thermoforming of wood powders, based on experimental data of thermoforming of poplar and reed 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 according to Shima model, the calculated data obviously deviate from the experimental results under the condition of thermoforming. A pressure-density model of thermoformiug of poplar and reed 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.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2016年第4期103-110,共8页
Journal of Central South University of Forestry & Technology
基金
国家林业公益性行业科研专项经费资助项目(201404508)
湖南省自然科学基金
常德市联合基金资助项目(14JJ5018)
湖南省工业支撑计划科技项目(2015GK3016)
湖南省研究生科研创新项目(CX2015B301)
中南林业科技大学研究生科技创新基金资助项目(CX2015B23)
关键词
木质粉末
热压成形
致密化
数值模拟
wood powder
thermoforming
densification
numerical simulation
