Elastic Hysteresis Property of Several Steels under Fatigue Load

Observations were made on the plastic strain amplitude on five sorts of carbon steel when they were subjected to the alternating stress. The behaviour of the plastic strain occurring in the specimen of respective steel were compared to each other, and some patterns of variations were stipulated referring to the carbon content. Linear relations between the plastic strain, as well as the hysteresis energy, and the number of cycles to failure were confirmed to hold excepting the case of 0.25% carbon steel. Stress-strain relations under repeating stress were discussed in detail to a certain extent