ELASTO-PLASTIC ANALYSIS OF A HEAVY DUTY PRESS USING F.E.M AND NEUBER’S APPROXIMATION METHODS

Heavy duty presses are subjected to extreme load conditions especially during operations like bending, shearing, drawing etc. It generates very high stresses in the punch and die of the press tool. As a sequel to this, failure of the press tool occurs, sometimes prematurely. Hence estimation of the stresses under severe load conditions is of paramount importance. In the current work elasto-plastic analysis is carried out employing Finite Element Method for the evaluation of stresses in the upper tool of an 8000 tonnes heavy duty press. Neuber’s approximation method is also carried out and the results are found to be in consonance with the Finite Element Analysis results.