木材科学与技术2024，Vol.38Issue(2)：12-19,8.DOI:10.12326/j.2096-9694.2023152
基于改进Hofstetter模型的杨木组分体积分数对其弹性参数的影响规律
Effect of Component Volume Fractions on Elastic Parameters of Poplar Wood Based on Improved Hofstetter Model
摘要
Abstract
The microstructure characteristics and composition of wood are important factors that affect elastic parameters.However,little research has been conducted on the impact of volume fraction changes in wood components.The Hofstetter continuum micromechanics model for wood was improved by introducing ash.The effect of changes in the component volume fraction of poplar wood on elastic parameters was discussed.The result shows that the improved Hofstetter model can accurately predict the longitudinal elastic modulus EL,with an absolute value of error of 13.71%.The elastic modulus and shear modulus of poplar increase significantly when the component volume fraction with high stiffness such as crystalline cellulose increases.When the volume fraction of polymer network or amorphous cellulose increases,the increase of Poisson's ratio is significant.Changes in the volume fraction of lignin or hemicellulose have a small impact on all elastic parameters.关键词
杨木/改进Hofstetter模型/连续介质假设/组分/弹性参数/组分体积分数变化Key words
poplar wood/improved Hofstetter model/continuous medium hypothesis/components/elastic parameter/changes in component volume fractions分类
农业科技引用本文复制引用
王忠铖,杨娜,李久林..基于改进Hofstetter模型的杨木组分体积分数对其弹性参数的影响规律[J].木材科学与技术,2024,38(2):12-19,8.基金项目
北京市博士后工作经费资助项目"大跨空间结构胶合木材料及节点力学性能研究"(2023-ZZ-129). （2023-ZZ-129）
