Abstract:

In order to get 3 elastic constants (longitudinal direction L, tangential direction T and radial direction R) and poisson’s ratios of Castanopsis hystrix by experimental research, so that the elastic deformation properties of Castanopsis hystrix were obtained for further study on the physical and mechanical properties of wood and for the theory basis on design of wood structure. Strain gauges were acted as the deformation sensor. Using uniaxial compression and measuring strain by resistance strain gauge, then it could be obtained the elastic modulus and poisson’s ratios of Castanopsis hystrix. The results showed that 3 main directions of the elastic modulus were EL=9352 MPa, ET=573 MPa, ER=1727 MPa, 3 principal directions of 6 poisson’s ratios were μLT=0.616, μLR=0.457, μTL=0.038, μTR=0.282, μRT=0.785, μRL=0.067. Longitudinal elastic modulus was maximum, then radial elastic modulus followed, and tangential elastic modulus was minimum. Tangential poisson’s ratio was the maximum, then radial poisson’s ratio followed, and vertical poisson’s ratio was minimum.