木材科学与技术2026，Vol.40Issue(1)：51-56,6.DOI:10.12326/j.2096-9694.2025079
高性能杨木重组木顺纹抗拉强度尺寸效应研究
Study on Size Effect on Tensile Strength Parallel to Grain of High-Performance Poplar Wood Scrimber
摘要
Abstract
High-performance wood scrimber,as a novel engineered wood product,exhibits significant potential for applications in construction due to its excellent mechanical properties and dimensional stability.However,the size effect on its mechanical strength remains understudied.This study focused on high-performance poplar wood scrimber,preparing specimens with varying cross-sectional areas and tensile lengths to test their tensile strength parallel to grain.The strength percentiles were analyzed using a lognormal distribution,and size effect coefficients were determined based on the weakest link theory.Results indicated that the tensile strength of high-performance poplar wood scrimber exhibited a significant size effect with changes in cross-sectional area and tensile length.The size effect coefficient of tensile length(kL)was greater than that of cross-sectional area(kA),and both increase linearly with the strength percentile(Pf),satisfying the relationships kL=0.056+0.046Pf and kA=0.038+0.053Pf.Based on the differences in size effect coefficients of tensile length and cross-sectional area,a method for calculating reduction factor of tensile strength was proposed,taking into account the size variations in both tensile length and cross-sectional area of high-performance poplar wood scrimber.关键词
高性能杨木重组木/尺寸效应/顺纹抗拉强度/最弱链理论/截面积/受拉长度Key words
high-performance poplar wood scrimber/size effect/tensile strength parallel to grain/weakest link theory/cross-sectional area/tensile length分类
农业科技引用本文复制引用
武国芳,张亚慧,钟永,任海青..高性能杨木重组木顺纹抗拉强度尺寸效应研究[J].木材科学与技术,2026,40(1):51-56,6.基金项目
"十四五"国家重点研发计划课题"高性能重组木连续化制造关键技术与装备"(2021YFD2200601) （2021YFD2200601）
"十四五"国家重点研发计划课题"结构用大规格集成材的制造与评价关键技术"(2021YFD2200605). （2021YFD2200605）
