Abstract:
The aim of this study was to investigate the relationships among wood
density, modulus of rupture (MOR), modulus of elasticity (MOE), compression
parallel to grain (CNP) and compression perpendicular to grain (CPG) in 32 timber
species grown in Sri Lanka. Defects free stem section from each timber was taken
at the breast height and samples were prepared according to BS 373: 1957 standard.
The tests for mechanical properties were performed through the Universal Testing
Machine (UTM 100 PC). Linear Regression Analysis was done for interpreting the
effectiveness of the relationship in wood density with other mechanical properties
(MOR, MOE, CPG, CNG). The relationship between wood density and mechanical
strength properties were analyzed by regression models.Wood density showed strong
positive relationship with CPG and MOR. Results in the regression test revealed a
significant relationship (P = 0.001) among wood density and other mechanical prop erties such as MOR, MOE, CNP and CPG. These results can be used for developing
effective timber classification system in Sri Lanka
