Tensile Strength and Elastic Modulus of Moso Bamboo

Additionally, the mechanical properties of bamboo are 2-3 times those of the common timber. In order to maximise the use if the Moso Bamboo, its essential mechanical and physical properties are fully understood. It has been established that the mechanical attributes of the bamboo depends on the culms position (Lee, Bai & Peralta, 1994). It is also established that the mechanical properties are affected the height location of the culms and that the bending properties and the density increase starting from the inner layers as you go outwards of the bamboo culms. Tensile strength is the resistance of a material to breakage under tension. Tensile strength is measured using the Universal Testing Machine. The tensile strength was tested at cross head velocity of three millimeters per minute.

The node is deliberated as the frailest contact in the system considering the fact that the antinode’s direction if fiber is the reverse of that of the nodes. The table below shows standard tests which are utilized in obtaining the mechanical properties. They are based on small clear standards. Specimen (a) had shear failure whereas specimen B had some cracks which can be attributed to the bending moments of the cantilever and hence, specimen (a) is preferably adopted and tested under different moisture content levels. The table below resulted. Test Results Tensile Strength To get the tensile strength, the applied load by the UTM is divided by the cross-sectional area (Lee, Bai & Peralta, 1994). The average tensile strength of the Phyllostachys Edulis is between 115-309 MPa.

Young’s’ Modulus of Elasticity The bamboo’s Young’s modulus in the longitudinal orientation is Where Ep and Evp are the Young’s modulus for the parenchyma and vascular bundles in that order. 4 GPa. The variance evaluation provide indications that the layer had a notable impact on the tensile strength and modulus of elasticity too. Generally, the modulus of elasticity increased when the layer increased from the internal layers to the external layers but subsequent layers have no big differences (Li, 2004). In the same manner, the tensile strength increased from the internal layers towards the external layer and the difference between the middle layers was somehow insignificant. Discussion Some of the greatest and unique features of the Moso bamboo is the huge modulus of elasticity and modulus of rapture of the external layer in comparison with the internal layers which may be attributed to the anatomy of its fine structures.