Experimental Research On Microstructure And Mechanical Performance Of Bamboo

Phyllostachys pubescens is the composite multiphase material made up of cellosilk and lignin, and the mechanical properties are preferable to the wood because of the regular arrays of vascular bundles. Moso bamboo could be considered as two-phase composite materials from the viewpoint of mesomechanics, with the vascular bundles are regarded as reinforcement, other ingredients are matrix. Introducing the photomicrography and macroscopic mechanical experiments, the relationship between the spatial distribution or the volume percent of vascular bundles and the mechanical property of bamboo is proposed in this paper, the major conclusions of this research are included below:1.Study on the microstructure of bamboo woodAiming at the micromechanics model of bamboo, we study the spatial distribution of vascular bundles of bamboo via the photomicrography technique. The research shows that the volume percent of vascular bundles increases from inner to outer in the radial direction, and also with the increasing of bamboos'height.2.The macroscopically mechanical properties testing of bambooBased on some experiments, this paper presents the compressive strength, the tensile strength, the elasticity modulus in tension and the elasticity modulus in compression of testing specimen, which are all parallel to grain for the micromechanical model of bamboo wood.3.Study on the relationship between volume percent of vascular bundles and mechanical propertyBased on the microstructure and the mechanical experimentation of the testing specimen, the quantitative relation of volume percent of vascular bundles and mechanical property is proposed.