The stress-strain state simulation of the aircraft fuselage stretch forming in the ANSYS

Abstract

The work is devoted to the study of the stress-strain state of a thin-walled blank in the stretch forming process. The reasons for the occurrence of defects in the process of shaping, in particular ruptures, were investigated in this work. The task of the research was to assess the behavior of the blank in the process of loading, identify areas of unstable forming, zones of non-passing into the plasticity stage, as well as areas in which the strains reach the limit value. The analysis of the current state of the issue of scientific elaboration of the problem of defect-free coating is carried out. A finite element model of the stitching process is constructed, including models of the rigid surface of the punch and the sheet being molded. The loads were simulated using displacements in the longitudinal direction and rotations in the transverse plane of the workpiece sheet. As part of the study, the reasons for the breakdown of the stocking process in the process of stitching in the places where the sheet was clamped with sponges were determined.