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The paper deals with observation and description of the influence of strain rate on true stress true strain. It compares various material models that consist strain rate for deepdrawing sheets in order to work out the most accurate material models. The more accurate input to the simulation program, give the more exact output. These simulation programs introduce higher accuracy into development and production of the pressed material and reduce production costs. Computer simulation using the software programs (e.g. PAM-STAMP, ABAQUS – Explicit, DYNA 3D etc.) also presents replacement of financially expensive experiment, utilization of potential properties of materials and error detection in the production process.

THE METHODS TO DETERMINE THE STRAIN RATE OF THE STEEL SHEETS USED IN THE PRODUCTION PROCESS