Stress-strain State in Elastic Phase in Ni3Al superalloy with soft interlayer

Abstract

Abstract In this study, the stress-strain State in elastic phase of cylinder-cylinder joint in Ni3Al superalloy with “soft” elastic modulus ratios was investigated by computer simulation. To establish the general patterns of SSS formation when loading cylindrical nodes with interlayers of “soft” rigidity and checking the adequacy of the simulation, three load cases were calculated: -5 (var.1), -20 (var.2) and -40 (var.3) MPa. The result shows that regardless of the magnitude of the axial load (in all load cases) in the nodes, with “soft” interlayers, the width of the zone of volumetric SSS in the main material is commensurable with the thickness of the interlayer, the length from the external surface of the node is not more than 5∼10 thickness of the interlayer; the nature of the SSS in the elastic stage of the material is completely only the level of stresses is directly proportional to the magnitude of the external load. This corresponds to the general laws of mechanics and confirms the adequacy of the results of computer simulation.