Parametric Analysis of Steel Cutting Using Johnson and Cook Model

Abstract

Many manufacturing applications involve high temperatures and high strain rate deformations. Experimental tests are very expensive to study those problems. For that, it is very important to use numerical analysis. The main goal of those studies is to determine the stress state in manufacturing processes, to elaborate characterization tests and to compute the studied process. In this paper, we focus to cutting process of AISI 1045 steel in which a thermomechanical model is developed. The Johnson and Cook’s law was used for the behavior of workpiece. Its five parameters may be easily found in literature for AISI 1045 steel material. We start by determine the triaxiality, the temperature and stress fields in cutting process with continuous chip. This study allows us to develop the characterization tests from negative to positive triaxialities. After that, a numerical examination is carried out to study the influence of cutting parameters on the variation of temperature, cutting force and max Von Mises stress in workpiece. The interaction of cutting speed and feed and the interaction of all the two cutting parameters have significant influence on cutting force, temperature and max Von Mises stress fields. Hence, in the turning process optimization, we focus on choosing an appropriate combination of cutting parameters that are principally the cutting speed and feed.