Correlation between Stress and Strain of wood used in construction

Wood is a biomaterial and its used for different purposes in construction. The testing of any material is very important to decide its suitability, quality and making decision whether it will be used or not so it is necessary to determine the mechanical properties of wood inorder to have an idea about its behavior during loading of structure. The aim of this research is to investigate the mechanical characteristics of wood used as a building material through studying the stress-strain diagram of this constructional material and calculating the modulus of elasticity of wood in various methods which is considered as the main property of wood. The experimental part of this study included testing of many prisms with dimensions of 75 × 5 × 5 cm . Under bending and measure the deflection during the stages of loading until occurance of failure and draw the stress-strain graph for each specimen. The conclusion and recommendation will be written especially that concerning the using of wood as a structural material in formworks.