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Removal of residual stress in thin sheets by tension leveling

By Martin Dymáček


Tension leveling is a process used in the steel industry in order to eliminate any shape imperfections of cold-rolled thin strips. The master thesis deals with developing a computer program that generates basic parameters of tension leveling line. The theoretical part of the thesis summarizes the types of the shape imperfections in strips, their causes and the principles of their elimination. This part also presents the mechanism of tension leveling and describes the present-day design of tension levelers. The practical part of the thesis starts with an analytical description of stress-strain behaviour of strip during tension leveling (supposing the simplified conditions). A computer program that allows devising basic parameters of tension leveling line is created on the basis of these analytical relations. The program results are successfully verified by numerical model based on the finite element method (FEM) created in the program ANSYS. Then the interdependencies of certain input and output parameters of created program are determined. These interdependencies can be used as effective design of tension leveling lines

Topics: tenký pás; residual stress; zbytkové napětí; thin strip; shape imperfection; tension leveling; Plastická deformace; imperfekce tvaru; tahové rovnání; Plastic deformation
Publisher: Vysoké učení technické v Brně. Fakulta strojního inženýrství
Year: 2010
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