Modifying strain-hardening of carbon steels for improved finite element simulation of orthogonal machining
- 26 October 2009
- journal article
- research article
- Published by SAGE Publications in Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
- Vol. 224 (5), 721-732
- https://doi.org/10.1243/09544054jem1615
Abstract
The results of finite element simulations of machining three carbon steels (BS970 070M20, 080M40, and 080M46), in the speed range 50–250 m/min and at an uncut chip thickness of 0.25 mm, are presented and compared with experimental results. It is shown that predictions of cutting forces and chip thickness ratios that are better than those obtained in many previous studies can be achieved by systematically changing the measured strain-hardening behaviour of the steels, to create materials with higher initial yield stress but unchanged flow stress at strains greater than 1.0. A justification for the change comes from earlier work that demonstrated an equivalence between that and including an upper yield point in the description of the initial yielding of the steel and which also shows that inclusion of an upper yield point is key to accurate predictions. The practical value of the paper is to show how improved simulations of machining may be obtained with commercial software packages without the need to create upper yield point material models.Keywords
This publication has 11 references indexed in Scilit:
- Modelling orthogonal machining of carbon steels. Part II: Comparisons with experimentsInternational Journal of Mechanical Sciences, 2009
- Modelling orthogonal machining of carbon steels. Part I: Strain hardening and yield delay effectsInternational Journal of Mechanical Sciences, 2009
- DEPENDENCE OF MACHINING SIMULATION EFFECTIVENESS ON MATERIAL AND FRICTION MODELLINGMachining Science and Technology, 2008
- The influence of friction models on finite element simulations of machiningInternational Journal of Machine Tools and Manufacture, 2005
- EFFECTS OF FLOW STRESS AND FRICTION MODELS IN FINITE ELEMENT SIMULATION OF ORTHOGONAL CUTTING—A SENSITIVITY ANALYSISMachining Science and Technology, 2005
- Modelling and simulation of high‐speed machiningInternational Journal for Numerical Methods in Engineering, 1995
- Dislocation-mechanics-based constitutive relations for material dynamics calculationsJournal of Applied Physics, 1987
- Predicting a Material's Machining Characteristics Using Flow Stress Properties Obtained from High-Speed Compression TestsProceedings of the Institution of Mechanical Engineers, 1974
- Dynamic plasticity: Macroscopic and microscopic aspectsMaterials Science and Engineering, 1973
- An Experimental Investigation of the Influence of Strain-Rate and Temperature on the Flow Stress Properties of a Low Carbon Steel Using a Machining TestProceedings of the Institution of Mechanical Engineers, 1970