FE-Simulation of Metal Cutting Processes
Licentiate thesis, 2021
Chip formation is governed by the thermo-mechanical properties of the workpiece material, tool geometry and cutting conditions. Hence, the chip can take different shapes such as continuous or serrated depending on the severity of the cutting process for a given material. In addition to a well-defined material model, the reliable prediction of chip shape in machining demands the implementation of an appropriate damage model. In this work, two different damage models are investigated - referred to as local and nonlocal damage models. The difference between these two models is that one (non-local damage model) includes the gradient effect into the formulation influencing the progression rate, whereas the other one does not. The performance of these damage models is evaluated for simulation of damage evolution during tensile and SHPB tests.
Finite element method
Ahmet Semih Ertürk
Chalmers, Industrial and Materials Science, Material and Computational Mechanics
Gradient-enhanced damage growth modelling of ductile fracture
International Journal for Numerical Methods in Engineering,; Vol. in Press(2021)
A thermomechanically motivated approach for identification of flow stress properties in metal cutting
International Journal of Advanced Manufacturing Technology,; Vol. 111(2020)p. 1055-1068
Ahmet S. Ertürk, Amir Malakizadi, Ragnar Larsson. Evaluation of different constitutive models for machining simulation.
A simulation based guide to machinability assessment
VINNOVA (2016-05397), 2017-09-01 -- 2020-11-27.
Manufacturing, Surface and Joining Technology
Other Materials Engineering
Chalmers University of Technology
Virtual Development Laboratory, Chalmers Tvärgata 4C, Göteborg
Opponent: Prof. Aylin Ahadi, Department of Mechanical Engineering Sciences, Lund University, Sweden