THE CIRCUMFERENTIAL MECHANICAL PROPERTIES OF BAMBOO WITH BIAXIAL COMPRESSION TESTS
The objective of this study is to investigate the effect of uniaxial and biaxial compression loadings on the circumferential-radial mechanical properties of bamboo.A novel biaxial testing device,called 3D composite material analysis system,was developed to conduct biaxial compression tests.Strain field analysis was characterized with the help of the digital speckle correlation method (DSCM).The effects of four different environmental treatments (I.air-drying,II.constant temperature and relative humidity,III.relatively low temperature,and IV.ultra-low temperature) on the circumferential performance of bamboo were examined in the experiment.The results of this study indicated that the diametric strength of bamboo evaluated by biaxial load was as 2.4 to 2.5 times the uniaxial compression.Under biaxial load,the strength of the bamboo node was about 2.38 times higher than the internode.Failure first occurred at the outside surface of bamboo at about the 45° position between X and Y axial when conducting a biaxial compression test.The distribution of X-strain field presented more uniformly than the Y-strain field.The diametric mechanical properties of bamboo ring were σIV>σIII>σII>σI for both the uniaixal and biaxial compression tests.
Bamboo Biaxial compression Mechanical properties Ultra-low temperature Strain field
Fuming Chen Zehui Jiang Ge Wang Sheldon Q.Shi Xing’e Liu Hai-tao Cheng
International Centre for Bamboo and Rattan,Beijing,China,100102 Mechanical and Energy Engineering,University of North Texas,Denton,TX76203-1277,USA
国内会议
南京
英文
1-10
2012-09-01（万方平台首次上网日期，不代表论文的发表时间）