FEM-SIMULATION OF PLATE ROLLING PROCESS, ANALYSIS OF INHOMOGENEOUS DEFORMATION AND INDEXES OF STRESS STATE IN THE DEFORMATION ZONE

摘要

Thick sheet is used for the production of large diameter gas pipelines, shipbuilding and other types of responsible products. There are specific requirements for an isotropic and homogeneous structure, strength, plasticity, fracture toughness of metal, manufacturing precision and sheets surface quality. The results of deformation zone geometry and plate rolling process kinematics calculations were received with help of the software systems DEFORM-3D and Q-FORM. Development of a computer model of the rolling process was carried out considering assortment of produced steel and technological capabilities of the plate rolling mill 5000 JSC "MMK" equipment. This paper contains a comparative analysis of the computer simulation results and calculation results on engineering techniques used to estimate the parameters of the stress-strain state, as well as the efficiency of FEM plate rolling process modeling application. Use of DEFORM-3D and QFORM software packages allowed to reveal patterns of inhomogeneous deformation change, stress state index, the velocity field on the geometric parameters and modes of deformation zone rolling. As a criterion of deformation inhomogenuity in the deformation area a coefficient of variation is used, which is convenient for analysis and forecasting quality of the structure during rolling. Analysis of the stress state in DEFORM-3D software showed that FEM-simulation of plate rolling does not give reliable data on the index of the stress state because they do not satisfy the boundary conditions at the input and output of the deformation zone.