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

Abstract

In this study, precise samples of Scots pine wood were subjected to bending strength tests in air dry, moisture above LDN and steamed conditions. In the tests, in addition to resistance values, stress and deformation at the elastic limit, II. zone length and total deformation were investigated. As a result of the experiments, it was observed that the materials lost some resistance after the maximum load was reached in LDN and steamed samples, but they continued to carry the load. This situation has led to the need to create two different resistance classes: maximum bending tensile strength and bending fracture resistance. The maximum stress in bending and fracture resistance in bending was found to be highest in air-dried samples, while the lowest was found in steamed samples. In examining the elastic limit resistance and deformations, the highest values were found in air-dried samples, while the lowest values were found in steamed samples. In determining the II. zone length, it was determined that the II. zone length of steamed samples gave the highest value, while air-dried samples gave the lowest value. In determining the total deformations, it was concluded that while the most deformation occurred in the steamed samples, the least deformation occurred in the air-dried samples.