The Best Width of Wood Specimen for Zero-span Tension Test  

作　　者：HUANG Yanhui1 FEI Benhua1 ZHAO Rongjun2 ZHANG Shuqin1 1.Beijing Research Institute of Forestry Machine, Beijing 100029, P.R.China 2.Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, P.R. China 

出　　处：《Chinese Forestry Science and Technology》2008年第2期29-32,共4页中国林业科技（英文版）

基　　金：the National Natural Science Key Foundation of China "The Constructing and Application of Token System for MechanicsProperties of Wood Cell Wall (C02060102)"

摘　　要：In recent years, the zero-span tension technique of paper and pulp-making industry was applied to wood industry for indirectly testing the longitudinal tensile strength of tracheids. In this paper, this technique was used to test the longitudinal tension strength of tracheids for Chinese fir specimens with different widths. The results showed that average tension strength was 357.39 MPa. The order of average tension strength of tracheids was: 3 mm > 12 mm > 6 mm > 9 mm > 7.5 mm. But, earlywood samples frequently contained a little latewood and sample-making was difficult when the width of specimen was bigger, both the testing and the putting of samples were difficult when the width of specimen was smaller. Therefore, the width of 6 mm was chosen as the best width of specimen of Chinese fir.In recent years, the zero-span tension technique of paper and pulp-making industry was applied to wood industry for indirectly testing the longitudinal tensile strength of tracheids. In this paper, this technique was used to test the longitudinal tension strength of tracheids for Chinese fir specimens with different widths. The results showed that average tension strength was 357.39 MPa. The order of average tension strength of tracheids was: 3 mm > 12 mm > 6 mm > 9 mm > 7.5 mm. But, earlywood s...

关 键 词：zero-span tension strength Chinese fir (Cunninghamia lanceolata) longitudinal TRACHEID 

分 类 号：S781[农业科学—木材科学与技术]