毛竹顺纹抗拉性质的变异及与气干密度的关系  

Variation in Tensile Properties and Relationship between Tensile Properties and Air-Dried Density for Moso Bamboo

作　　者：虞华强[1] 费本华[1] 任海青[1] 江泽慧[1] 刘杏娥[2] 

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091 [2]安徽农业大学森林利用学院,合肥230036

出　　处：《林业科学》2006年第3期72-76,共5页Scientia Silvae Sinicae

基　　金：国家"十五"科技攻关计划"竹藤资源培育及高效利用产业化技术研究与示范"项目(2001BA506B);国家林业局"948"项目"特有竹类植物种质资源引进"(2001-19)

摘　　要：将毛竹轴向分段（4段）、径向分层（6层）取样,研究其顺纹抗拉弹性模量和顺纹抗拉强度的变异规律,顺纹抗拉性质与气干密度之间的关系.结果表明：毛竹的顺纹抗拉弹性模量和顺纹抗拉强度的径向变异很大,不同位置竹材的顺纹抗拉弹性模量为8.49～32.49 GPa,最外层竹材的顺纹抗拉弹性模量约是最内层的3～4倍;不同位置顺竹材顺纹抗强度在115.94～328.15 MPa之间,最外层竹材的顺纹抗强度是最内层的2～3倍.用直线方程预测毛竹顺纹抗拉性质的效果略优于曲线方程的效果.The longitudinal tensile strength and the longitudinal tensile modulus of elasticity were investigated for moso bamboo （ Phyllostachys pubescens） at different heights and radial positions. Results showed that the variation of the longitudinal tensile properties in the radial direction was greater than that in the longitudinal direction. The longitudinal tensile modules of elasticity ranged from 8.49 to 32.49 GPa. The tensile module of elasticity in outer culm was about 3 to 4 times as high as that in inner culm. The longitudinal tensile strength ranged from 115.94 to 328.15 MPa. The tensile strength in the outer is 2 to 3 times as high as that in the inner. Linear and curvilinear regressions were done from tested data of tensile strength and modulus and airdried density in this paper. The linear equation worked a little better than the curvilinear one to predict the longitudinal tensile strength and tensile modulus from air-dried density.

关 键 词：毛竹 气干密度 顺纹抗拉弹性模量 顺纹抗拉强度 

分 类 号：S781.29[农业科学—木材科学与技术]