The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Xiaomin Deng - One of the best experts on this subject based on the ideXlab platform.
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Finite element analysis of the orthogonal metal Cutting Process
Journal of Materials Processing Technology, 2000Co-Authors: Chandrakanth Shet, Xiaomin DengAbstract:In this paper, the orthogonal metal Cutting Process is analyzed with the finite element method under plane strain conditions. Frictional interaction along the tool-chip interface is modeled with a modified Coulomb friction law, and chip separation is based on a critical stress criterion and is simulated using a nodal release procedure. Finite element solutions of temperature, stress, strain, and strain rate fields have been obtained for a range of tool rake angle and friction coefficient values. Results showing how the tool-chip interfacial friction affects the field distributions are new and add to the existing knowledge base. This paper also reports the procedure and specific modeling techniques for simulating the orthogonal metal Cutting Process using a general-purpose finite element computer code. The findings of this paper provide useful insights for understanding and for improving the orthogonal metal Cutting Process.
Yusuf Altintas - One of the best experts on this subject based on the ideXlab platform.
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Simulation of the orthogonal metal Cutting Process using an arbitrary Lagrangian-Eulerian finite-element method
Journal of Materials Processing Technology, 2000Co-Authors: Mohammad Reza Movahhedy, Mohamed S. Gadala, Yusuf AltintasAbstract:Two different finite-element formulations, the Lagrangian and the Eulerian, have been used extensively in the modeling of the orthogonal metal Cutting Process. Each of these formulations has some disadvantages that make it inefficient for modeling the Cutting Process. In this paper, it is shown that a more general formulation, the arbitrary Lagrangian-Eulerian (ALE) method may be used to combine the advantages and avoid the shortcomings of both of the previous methods. It is also shown that due to the characteristics of the Cutting Process, this formulation offers the most efficient modeling approach. Some preliminary results of this approach are presented to demonstrate its capabilities and potential in simulating the Cutting Process.
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Simulation of chip formation in orthogonal metal Cutting Process: an ALE finite element approach
Machining Science and Technology, 2000Co-Authors: Mohammad Reza Movahhedy, Mohamed S. Gadala, Yusuf AltintasAbstract:Lagrangian and Eulerian finite element formulations have been traditionally used for modeling of the orthogonal metal Cutting Process. In this paper it is shown that a more general formulation, the arbitrary Lagrangian-Eulerian method (ALE), may be used to combine the advantages and avoid the drawbacks of both methods in a single analysis. Due to the characteristics of the Cutting Process, ALE formulation offers a very efficient modeling approach for the Cutting Process. A comprehensive ALE model along with strain rate and temperature dependent constitutive equations and a contact/friction algorithm is used to analyze the thermo-elasto-plastic Process of plane strain orthogonal Cutting. Simulation results for Cutting of low carbon free Cutting steel are presented and compared with available experimental data obtained under similar Cutting conditions. Good agreement between the numerical and experimental results is observed.
Günter Radons - One of the best experts on this subject based on the ideXlab platform.
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Nonlinear dynamics of a regenerative Cutting Process
arXiv: Chaotic Dynamics, 2012Co-Authors: Grzegorz Litak, Sven Schubert, Günter RadonsAbstract:We examine the regenerative Cutting Process by using a single degree of freedom non-smooth model with a friction component and a time delay term. Instead of the standard Lyapunov exponent calculations, we propose a statistical 0-1 test analysis for chaos detection. This approach reveals the nature of the Cutting Process signaling regular or chaotic dynamics. For the investigated deterministic model we are able to show a transition from chaotic to regular motion with increasing Cutting speed. For two values of time delay showing the different response the results have been confirmed by the means of the spectral density and the multiscaled entropy.
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Nonlinear dynamics of a regenerative Cutting Process
Nonlinear Dynamics, 2012Co-Authors: Grzegorz Litak, Sven Schubert, Günter RadonsAbstract:We examine the regenerative Cutting Process by using a single degree of freedom nonsmooth model with a friction component and a time delay term. Instead of the standard Lyapunov exponent calculations, we propose a statistical 0-1 test analysis for chaos detection. This approach reveals the nature of the Cutting Process signaling regular or chaotic dynamics. For the investigated deterministic model, we are able to show a transition from chaotic to regular motion with increasing Cutting speed. For two values of time delay showing the different response, the results have been confirmed by the means of the spectral density and the multiscaled entropy. © Springer Science+Business Media B.V. 2011.
Chandrakanth Shet - One of the best experts on this subject based on the ideXlab platform.
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Finite element analysis of the orthogonal metal Cutting Process
Journal of Materials Processing Technology, 2000Co-Authors: Chandrakanth Shet, Xiaomin DengAbstract:In this paper, the orthogonal metal Cutting Process is analyzed with the finite element method under plane strain conditions. Frictional interaction along the tool-chip interface is modeled with a modified Coulomb friction law, and chip separation is based on a critical stress criterion and is simulated using a nodal release procedure. Finite element solutions of temperature, stress, strain, and strain rate fields have been obtained for a range of tool rake angle and friction coefficient values. Results showing how the tool-chip interfacial friction affects the field distributions are new and add to the existing knowledge base. This paper also reports the procedure and specific modeling techniques for simulating the orthogonal metal Cutting Process using a general-purpose finite element computer code. The findings of this paper provide useful insights for understanding and for improving the orthogonal metal Cutting Process.
C. I. Weng - One of the best experts on this subject based on the ideXlab platform.
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Nonlinear dynamics of the Cutting Process
International Journal of Mechanical Sciences, 1991Co-Authors: J.s. Lin, C. I. WengAbstract:A simple two-dimensional dynamic model for the nonlinear Cutting force is developed by considering the geometry of orthogonal Cutting, the effects of tool Cutting on the wavy surface of the workpiece and the variations of the Cutting angle in the Cutting Process. This model leads to a set of coupled second order differential equations with nonlinear stiffness and nonlinear time delay terms. From these the conditions for steady state chatter are derived. The numerical solutions of the governing dynamic equations reveal chaotic oscillations if the characteristic Cutting parameters are selected in the region corresponding to intensive Cutting. The presence of chaotic oscillations are illustrated by the phase planes, the Fourier spectra and the Poincaré map. © 1991.
