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Identification of material constitutive law constants using machining tests: A response surface methodology based approach


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Daoud, M., Jomaa, W., Chatelain, Jean-François, Bouzid, Abdel-Hakim and Songmene, Victor. 2014. « Identification of material constitutive law constants using machining tests: A response surface methodology based approach ». In 2014 International Conference on High Performance and Optimum Design of Structures and Materials, HPSM 2014 which incorporated the Seminar on Optimum Design in Engineering, OPTI 2014 (Ostend, Belgium, June 9-11, 2014) Coll. « WIT Transactions on the Built Environment » pp. 25-36. WITPress.
Compte des citations dans Scopus : 10.

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The finite element modeling (FEM) of chip formation is one of the most reliable tool for the prediction and optimization of machining processes; thanks to the high performance of advanced computers and robust finite element codes which made the modeling of complex machining processes (turning, milling, and drilling) becomes possible. The success of any FEM depends strongly on the constitutive law which characterizes the thermo-mechanical behavior of the machined materials. Johnson and Cook’s (JC) constitutive model is widely used in the modeling of machining processes. However, one can find in the literature, different coefficients of JC’s constitutive law for the same material which can affect significantly the predicted results (cutting forces, temperatures, etc.). These differences were attributed to the different methods used for the determination of the material parameters. In the present work, an inverse method, based on orthogonal machining tests, was developed to determine the parameters of the JC constitutive law. The originality of this study lies in the use of the response surface methodology (RSM) as a technique to improve the existing inverse method. The studied material is a 6061T6 high strength aluminum alloy. It is concluded that the calculated flow stresses obtained from the proposed approach were in a good agreement with the experimental ones. Moreover, the material parameters obtained from the present study predict more accurate values of flow stresses as compared to those reported in the literature.

Item Type: Conference proceeding
ISBN: 9781845647742
Chatelain, Jean-François
Bouzid, Hakim
Songmene, Victor
Affiliation: Génie mécanique
Date Deposited: 15 Jul 2014 14:01
Last Modified: 13 Apr 2023 16:08

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