A Comprehensive Approach to the Evaluation of Material Properties of S235JR Steel

The paper deals with the determination of mechanical and fatigue properties of S235JR steel, which is widely used in the engineering industry and also in other industries. The paper provides a brief overview of measurement procedures and basic mathematical formulations based on the standards CSN EN ISO 6892-1 and CSN 42 0368. The aim of the article is to provide a comprehensive view of the evaluation of material properties using not only conventional but also modern optical methods of mechanics, such as 3D digital image correlation or laser Doppler vibrometry. The output of the performed tests are material constants, mechanical properties in tension/pressure and fatigue characteristics under bending stress. The paper also presents the technique of estimating the Young's modulus of elasticity that is based on the experimental modal analysis. All results were obtained on a series of specimens made from an identical piece of material, making them ideal for defining a material card for different databases or FEM software.