8th European LS-DYNA Users’ Conference Cowper-Symonds material deformation law application in material cutting process using LS-DYNA FE code: turning and milling Virginija Gyliene Vytautas Ostasevicius Department of Engineering Design Faculty of Mechanical Engineering and Mechatronics Kaunas University of Technology Phone +370 37 300424 Fax +37037 323461 Email virginija.gyliene@ktu.lt ABSTRACT: Finite element modeling becomes the huge support in understanding technological process. Besides, there are no so much milling process studies, or these studies are simplified to, as orthogonal cutting process. This paper presents experiences results from orthogonal turning and face milling process. These results were taken for FE model validation and material deformation law constants prediction. In both cases some cutting process simplifications were taken, in order to define contact interaction - to execute meso-scale FE analysis. Concerning FE modeling, calculation scheme is presented in order to evaluate removing material load to cutting tool. Secondly, material behaviour characteristics were evaluated, assuming high speed deformation and material failure. Thirdly, cutting tool path is modeled in order to evaluate his influence on chip formation. KEYWORDS: Cutting process, Milling, Cowper-Symonds function