Thermoelastoplasticity simulation of a large-scaled low-alloy steel shaft material. (2nd report. On the circumferentially grooved cylinder loaded in the two defferent coolings).

Abstract

The thermoelastoplastic stresses caused within a large-scaled low-alloy steel shaft material, which has a circumferential groove in the longitudinal center of its axis, are dynamically simulated by FEM based on the incremental strain theory under the two different cooling conditions, i. e. water and air. An inner tensile peak stress zone and compression stress concentration areas along the groove move through the cooling process because both the plastic deformation at the surface and the non-similarity of volumetic expansion due to transformation are compounded. As a result, characterizing the residual distributions on principal stresses, σ1 and σ2 are close with the inner in the air cooled zone compared with the water cooled, and σ3 shows high compression stress concentrations at the fillets of the groove.