Modelling the dynamic behaviour of hard-to-cut alloys under conditions of vibro-impact cutting

International Symposium on Dynamic Deformation and Fracture of Advanced Materials 2013

物理学;材料科学

Muhammad, R.^1 ; Demiral, M.^1 ; Roy, A.^1 ; Silberschmidt, V.V.^1

Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, Leicestershire Loughborough, United Kingdom^1

关键词: Conventional turning;    Parametric -analysis;    Predictive capabilities;    Resistance properties;    Split Hopkinson pressure bars;    Three dimensional finite element model;    Three dimensional finite elements;    Ultrasonically assisted turnings;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/451/1/012030/pdf
DOI  :  10.1088/1742-6596/451/1/012030

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Industrial applications of titanium alloys have grown significantly over the years primarily due to their high strength, light weight as well as good fatigue and corrosion-resistance properties. Since these alloys are hard-to-machine, there is an obvious demand to develop simulation tools in order to analyse the material's behaviour during machining and, thus, optimise the entire cutting process. Deformation processes in the machining of Ti alloys are typically characterized by high strains, strain rates and temperatures; the material behaviour under such conditions was derived from split Hopkinson pressure-bar (SHPB) tests. In the current study, a computational three-dimensional finite element model of the SHPB test is developed to assess the material's behaviour at high-strain, strain-rate and temperature regimes. The material behaviour derived for high strain rates was used in three-dimensional finite-element modelling of conventional turning and ultrasonically assisted turning of Ti-15333 alloy. A parametric analysis of the studied alloy was carried out using the developed model. Comparisons of simulations with experimental results demonstrate their predictive capability.