杨木-氧化铋复合材料黏弹性表征与数值模拟  

Viscoelastic characterization and numerical simulation of poplar-bismuth oxide composites

作　　者：秦依婷 闫锦 张立强[1] 罗红 吴庆定[1] 余剑武[3] 谢志杰 张宗浩 QIN Yiting;YAN Jin;ZHANG Liqiang;LUO Hong;WU Qingding;YU Jianwu;XIE Zhijie;ZHANG Zonghao(Engineering Research Center for Forestry Equipment of Hunan Province,Central South University of Forestry and Technology,Changsha 410004,China;College of Mechanical and Electrical Engineering,Changsha Institute of Technology,Changsha 410200,China;College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]中南林业科技大学湖南省林业装备工程技术研究中心,湖南长沙410004 [2]长沙工业学院机电工程学院,湖南长沙410200 [3]湖南大学机械与运载工程学院,湖南长沙410082

出　　处：《中国粉体技术》2025年第3期122-130,共9页China Powder Science and Technology

基　　金：国家自然科学基金青年科学基金项目,编号:52205508;湖南省自然科学基金区域联合基金项目,编号:024JJ7640;长沙市自然科学基金项目,编号:kq2202288、kq2202289。

摘　　要：【目的】研究杨木加工残渣粉与氧化铋复合材料的组成对黏弹性的影响,实现杨木-氧化铋复合材料在家具工程等领域的应用。【方法】采用温压成形法将杨木残渣粉与氧化铋粉末相混合,制备不同粒径杨木粉的杨木-氧化铋复合材料;对复合材料进行恒载压缩蠕变实验,记录实时蠕变位移,根据应力-应变关系计算杨木-氧化铋复合材料的弹性模量;基于线性黏弹性理论计算复合材料的剪切松弛模量,采用广义Maxwell模型建立复合材料的黏弹性模型,利用优化软件1stOpt对弹性松弛模量进行最优拟合,并结合MSCMarc软件进行数值模拟,得出实时蠕变位移的数值模拟结果,并对实验结果与数值模拟结果的一致性进行评估。【结果】不同粒径杨木粉的杨木-氧化铋复合材料表现出不同的蠕变行为,具有明显的黏弹性特征,调整不同粒径杨木粉的比例,可改善复合材料的抗蠕变性能,当粒径不超过425μm与粒径不超过180μm的杨木粉的质量比为1:1时,抗蠕变性能最佳;压缩蠕变实验结果与MSCMarc软件数值模拟结果一致,表明短期蠕变实验数据可以预测复合材料的长期蠕变。【结论】杨木-氧化铋复合材料具有较高的抗蠕变性能和明显的黏弹性特征,在建筑和家具工程领域有较大潜力;短期蠕变实验数据可以预测长期蠕变,为评价该复合材料的使用性能提供可靠途径。Objective This study investigates the effect of the composition of poplar wood processing residue powder and bismuth oxide on the viscoelasticity of poplar-bismuth oxide composites,aiming to optimize their application in fields such as furniture engineering.Methods Poplar wood residue powder and bismuth oxide powder were mixed using a warm-press forming method to prepare poplar-bismuth oxide composites with different particle sizes.Compression creep experiments were carried out on each sample under a constant load of 2000 N,the real-time creep displacements were recorded.The elastic moduli were calculated from the stress-strain relationship to analyze composite viscoelasticity.The shear relaxation moduli were calculated based on the linear viscoelastic theory.The Kelvin-Voigt model and generalized Maxwell model were employed to establish viscoelastic models of the composites.Using optimization software 1stOpt,the elastic relaxation moduli were optimally fitted,and the corresponding shear modulus components(Gq)and shear relaxation time components(τq)were incorporated into the MSC Marc software for finite element simulation.This approach predicted the viscoelastic behavior of the composites and generated numerical simula-tion results of real-time creep displacement,which were then compared with the experimental results to evaluate consistency.Results and Discussion The poplar-bismuth oxide composites prepared via the warm-press forming method exhibited different creep behaviors and distinct viscoelastic properties depending on the particle size of the wood powder.By adjusting the propor-tion of wood powder with different particle sizes,the creep resistance of the composites was improved.When the mass ratio of poplar powder to bismuth oxide powder was 9:1,the composites exhibited minimal creep deformation and the highest creep resistance.Further improvements in creep resistance were achieved by optimizing the ratio of wood powder with particle sizes≤425μm and≤180μm.The optimal creep performance was observed w

关 键 词：杨木-氧化铋复合材料 黏弹性 压缩蠕变 温压成形 

分 类 号：TB44[一般工业技术]