Numerical Modelling and Analysis of Orthogonal Metal Cutting
Author
Summary, in English
The research work presented in this dissertation concerns the development of finite element models of the turning process. The finite element method has been used to gain better understanding of the cutting process. Both the updated Lagrangian- and the arbitrary Lagrangian-Eulerian formulation have been applied. For the time integration both the explicit and implicit time scheme have been used. The finite element models presented here is able to simulate a diversity of process parameters. Considering the workpiece the following process characteristics are investigated chip formation, cutting forces, temperature distribution, deformation zones, sub-surface deformation, stagnation zone and minimal chip thickness. For the cutting tool the affect micro-geometry has on the maximal principal stress, force distribution and the maximum effective stress is studied. The flow stress model used during this research is the Johnson-Cook model. An inverse analysis has been performed in order to enhance and predict new constants of this flow stress model. This is achieved by experimentally determined parameters from the turning process and then an inverse analysis is conducted by the use of a Kalman filter.
Publishing year
2015
Language
English
Full text
Document type
Dissertation
Publisher
Lund University (Media-Tryck)
Topic
- Applied Mechanics
Keywords
- Metal Cutting
- Finite Element Method
- Deformation Zones
- Sub-surface Deformation
- Tool Stress
- Inverse Analysis
- Kalman Filter
- Minimum Chip Thickness
Status
Published
Research group
- Mechanics
Supervisor
ISBN/ISSN/Other
- ISBN: 978-91-7623-559-1
Defence date
11 December 2015
Defence time
10:15
Defence place
Lecture hall M:E, M-building, Ole Römers väg 1, Lund University, Faculty of Engineering, LTH.
Opponent
- Mihai Nicolescu (Prof)