Stress – deformation relations of Scotch Pine (Pinus sylvestris L.) wood under different conditions

Abstract

Aim of this study is to determine the effect of moisture content on the stress and deformation values of scotch pine (Pinus sylvestris L.) wood on bending strength, modulus of elasticity in bending and compression strength parallel to the fibers values. These were tested using TS ISO standards under air dry, over fiber saturation point (FSP) moisture content, steamed over FSP and cooled conditions and stress – deformation values were obtained. In addition, the stress and deformation values at the elastic limit and the deformation values of the material after the elastic limit were examined. As a result, it was determined that moisture content and steaming treatment caused a decrease in all resistance types but increased the amount of deformation. While the averages of the over FSP and steamed samples were different in bending resistance and modulus of elasticity in bending, it was determined that there was no difference between the pretreatment groups in compression strength. It can be said that the strength and deformation values of the materials to be used especially in high moisture content areas should be selected in accordance with the place of use according to the results of the study.