Simulation of metal cutting using the particle finite-element method and a physically based plasticity model

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• 作者：J. M. Rodríguez ; P. Jonsén ; A. Svoboda
• 关键词：Particle finite ; element method ; Dislocation density constitutive models ; Metal cutting ; Machining
• 刊名：Computational Particle Mechanics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：4
• 期：1
• 页码：35-51
• 全文大小：4275KB
• 刊物类别：Theoretical and Applied Mechanics; Computational Science and Engineering; Classical Continuum Physic
• 刊物主题：Theoretical and Applied Mechanics; Computational Science and Engineering; Classical and Continuum Physics;
• 出版者：Springer International Publishing
• ISSN：2196-4386
• 卷排序：4

文摘

Metal cutting is one of the most common metal-shaping processes. In this process, specified geometrical and surface properties are obtained through the break-up of material and removal by a cutting edge into a chip. The chip formation is associated with large strains, high strain rates and locally high temperatures due to adiabatic heating. These phenomena together with numerical complications make modeling of metal cutting difficult. Material models, which are crucial in metal-cutting simulations, are usually calibrated based on data from material testing. Nevertheless, the magnitudes of strains and strain rates involved in metal cutting are several orders of magnitude higher than those generated from conventional material testing. Therefore, a highly desirable feature is a material model that can be extrapolated outside the calibration range. In this study, a physically based plasticity model based on dislocation density and vacancy concentration is used to simulate orthogonal metal cutting of AISI 316L. The material model is implemented into an in-house particle finite-element method software. Numerical simulations are in agreement with experimental results, but also with previous results obtained with the finite-element method.