کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
512439 866407 2015 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
MPM simulations of high-speed and ultra high-speed machining of titanium alloy (Ti–6Al–4V) based on fracture energy approach
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
MPM simulations of high-speed and ultra high-speed machining of titanium alloy (Ti–6Al–4V) based on fracture energy approach
چکیده انگلیسی

Based on material point method (MPM), two dimensional (2D) orthogonal chip model on titanium alloy is established. Unlike finite element method (FEM) with seriously distorted meshes during the simulation of large strains such as the formation of shear band, the MPM is especially suitable for the numerical simulation of large deformation and high strain rate of metal material at high temperature. The generalized interpolation material point (GIMP) contact algorithm, Johnson–Cook model and Hillerborg׳s fracture energy criterion are used to simulate the cutting process on Ti–6Al–4V alloy. The parameters option and simulation process are first discussed, then the corresponding chip force and temperature field etc. are analyzed and compared with experimental data available. A good agreement has been found between them. Finally, the evolution of the temperature and cutting force are studied, and the effects of cutting speed and cutting feed rate on the chip morphology and cutting force are also investigated. It was the first time to simulate the serrated and discontinuous chips with the MPM and obtain relatively satisfactory results. The transition from serrated to discontinuous chips has been well captured in this paper.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Analysis with Boundary Elements - Volume 59, October 2015, Pages 129–143
نویسندگان
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