Analýza procesu tažení zkušebních výtažků pro stanovení diagramů mezních deformací tenkých plechů

Abstract

This master's thesis deals with a comprehensive analysis of the drawing process of test specimens for determining the forming limit diagrams (FLD) of thin sheets. The main core of the work is the implementation and evaluation of numerical simulations of drawing DC01 structural steel using the finite element method in Simufact Forming software. These simulations virtually reproduce experimental tests conducted on a universal fixture in the laboratory of the Department of Mechanical Technology. The work analyzes the influence of punch geometry (with radii from R12 to R65) and various test specimen shapes on the resulting stress state. The simulation results are compared with real experimental specimens, confirming a high agreement in fracture prediction in 92.86% of the tested variants. Based on the results, the conclusion of the thesis proposes optimization steps to streamline laboratory testing, including the reduction of the test specimen set and the elimination of less beneficial rectangular bar tests.