不同含水率对四倍体刺槐抗弯强度及弹性模量的影响  

Effects of Different Moisture Content on Bending Strength and Elastic Modulus of Tetraploid Robinia pseudoacacia

作　　者：赵雪松[1] 俞国胜[1] 朱建国[1] 德雪红[1] 

机构地区：[1]北京林业大学工学院,北京100083

出　　处：《河南农业科学》2013年第5期177-180,共4页Journal of Henan Agricultural Sciences

基　　金：国家林业公益性行业专项基金项目(200904007)

摘　　要：为研究四倍体刺槐在弯曲负荷作用下破裂或折弯的变化规律,用数理统计的方法在万能力学试验机上对不同含水率的四倍体刺槐枝条的弯曲力学特性进行了研究。结果表明,4种含水率水平下,四倍体刺槐在弯曲载荷作用下的抗弯强度为54.12～94.42 MPa、弹性模量为4.81～9.30GPa。四倍体刺槐枝条的最大载荷在各个含水率水平下均随枝条直径的增大呈线性提高。四倍体刺槐的抗弯强度及弹性模量与含水率水平成一元线性相关关系,随含水率水平的降低四倍体刺槐的抗弯强度及弹性模量呈线性增大。To study the variation of tetraploid Robinia pseudoacacia rupturing or bending in bending load,statistical methods were used to research the bending mechanical properties of tetraploid Robinia pseudoacacia with different moisture content on a universal testing machine.The results showed that in bending load,the bending strength of tetraploid Robinia pseudoacacia was between 54.12 Mpa and 94.42 Mpa,and elastic modulus range was between 4.81 Gpa amd 9.30 Gpa.The maximum load of tetraploid Robinia pseudoacacia increased linearly with the branch diameter at various moisture content levels.The bending strength and elastic modulus presented a linear correlation with moisture content,and they increased linearly with the lowering of moisture content level.

关 键 词：四倍体刺槐 弯曲试验 抗弯强度 弹性模量 

分 类 号：S792.27[农业科学—林木遗传育种]