Effects of cyclic loading on the mechanical properties of steel

Laboratory experiments were performed on four European mild carbon steel grades i.e. S275, S355, S460 and S690 to investigate their stress-strain and low cycle fatigue behavior under cyclic loading. The coupons were tested at room temperature and at 0.2%/sec constant strain rate for three different loading protocols: Monotonic tensile, variable strain amplitude, and constant strain amplitude of 1%, 3%, 5% and 7%. Charpy V-notch impact tests were also performed at 20°C and -20°C to determine the amount of energy absorbed by each steel grade at fracture. Aimed at validating the experimental results, numerical analysis was also performed using Finite Element Software ABAQUS.Laboratory experiments were performed on four European mild carbon steel grades i.e. S275, S355, S460 and S690 to investigate their stress-strain and low cycle fatigue behavior under cyclic loading. The coupons were tested at room temperature and at 0.2%/sec constant strain rate for three different loading protocols: Monotonic tensile, variable strain amplitude, and constant strain amplitude of 1%, 3%, 5% and 7%. Charpy V-notch impact tests were also performed at 20°C and -20°C to determine the amount of energy absorbed by each steel grade at fracture. Aimed at validating the experimental results, numerical analysis was also performed using Finite Element Software ABAQUS