Drilling process modelling using SPH

Numerical methods became a powerful tool to understand such complicated process as cutting processes. Based on finite element techniques, firstly a big challenge – geometric modeling of bodies coming in contact interaction and mesh size/zone choice and creation. Secondly, today’s we now that finite element modeling is sure tool in the research of cutting processes after many series of experiments. So, here is the purpose to get reliable solution more quickly. ® The latest versions of LS-DYNA present the possibilities of Smooth Particle Hydrodynamics (SPH) method. This method was used in 3D drilling process modeling. Solution was done assuming high impact contact interaction, when cutting tool was assumed as non-deformable rigid tool, made of solid elements and work-piece consisted of particles instead of elements. SPH model was created by SPH generation interface from solid nodes. The papers will presents some aspects of multi edge cutting process modeling (drilling) using SPH method, as contact definition and SPH control. Either work-piece failure by tool motion (feed and rotation) was generated. So, two movement laws were defined. Firstly, the understanding of SPH method also is desirable for its appreciation that this method is “natural” considering the chip separation process. Secondly, this method is so-called as “fast” method as concerns Kernel function. These mentioned aspects were reason for the choice of SPH method for drilling process modelling with the purpose in further analysis to apply ultrasonic excitation. Firstly, the paper presents drilling experimental setup. Also the paper describes the techniques of geometrical model generation using SPH particles. The techniques of modelling of high impact contact interaction are presented.