摘要
为了探寻木质粉体温压成形致密化规律,基于杨木粉温压成形实验数据,借助有限元法分析成形压力对木质粉体压坯密度的影响,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:Shima模型特别适用于杨木粉常温成形过程的数值模拟,与实验结果十分吻合;在温压成形工艺条件下的模拟结果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温压成形的压力-密度模型与实验结果高度吻合。
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.
出处
《中国粉体技术》
CAS
北大核心
2015年第5期1-8,共8页
China Powder Science and Technology
基金
国家林业公益性行业科研专项经费项目
编号:201404508
湖南省自然科学基金常德市联合基金项目
编号:14JJ5018
2015年湖南重点研发计划(工业支撑计划)项目
编号:2015GK3016
湖南省高校科技创新团队支持计划资助项目
编号:2014207
湖南省研究生科研创新项目
编号:CX2015B301
中南林业科技大学研究生科技创新基金项目
编号:CX2015B23
关键词
杨木粉
温压成形
致密化
数值模拟
poplar powder
warm compaction
densification
numerical simulation
