During machining processes, materials undergo severe deformations that lead to different behavior than in the case of slow deformation. The microstructure changes, as a consequence, affect the materials properties and therefore influence the functionality of the component. Developing material models capable of capturing such changes is therefore critical to better understand the interaction process–materials. In this paper, we introduce a new physics model associating Mechanical Threshold Stress (MTS) with Dislocation Density (DD) models. The modeling and the experimental results of a series of large strain experiments on polycrystalline copper (OFHC) involving sequences of shear deformation and strain rate (varying from quasi-static to dynamic) are very similar to those observed in processes such as machining. The Kocks–Mecking model, using the mechanical threshold stress as an internal state variable, correlates well with experimental results and strain rate jump experiments. This model was compared to the well-known Johnson–Cook model that showed some shortcomings in capturing the stain jump. The results show a high effect of rate sensitivity of strain hardening at large strains. Coupling the mechanical threshold stress dislocation density (MTS–DD), material models were implemented in the Abaqus/Explicit FE code. The model shows potentialities in predicting an increase in dislocation density and a reduction in cell size. It could ideally be used in the modeling of machining processes.
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Ziyad Zenasni 1 ; Mohamed Haterbouch 1 ; Zoubir Atmani 2 ; Samir Atlati 3 ; Mohammed Zenasni 3 ; Khalid Nasri 3, 4 ; Omar Oussouaddi 5
@article{CRMECA_2019__347_8_601_0, author = {Ziyad Zenasni and Mohamed Haterbouch and Zoubir Atmani and Samir Atlati and Mohammed Zenasni and Khalid Nasri and Omar Oussouaddi}, title = {Physics-based plasticity model incorporating microstructure changes for severe plastic deformation}, journal = {Comptes Rendus. M\'ecanique}, pages = {601--614}, publisher = {Elsevier}, volume = {347}, number = {8}, year = {2019}, doi = {10.1016/j.crme.2019.06.001}, language = {en}, }
TY - JOUR AU - Ziyad Zenasni AU - Mohamed Haterbouch AU - Zoubir Atmani AU - Samir Atlati AU - Mohammed Zenasni AU - Khalid Nasri AU - Omar Oussouaddi TI - Physics-based plasticity model incorporating microstructure changes for severe plastic deformation JO - Comptes Rendus. Mécanique PY - 2019 SP - 601 EP - 614 VL - 347 IS - 8 PB - Elsevier DO - 10.1016/j.crme.2019.06.001 LA - en ID - CRMECA_2019__347_8_601_0 ER -
%0 Journal Article %A Ziyad Zenasni %A Mohamed Haterbouch %A Zoubir Atmani %A Samir Atlati %A Mohammed Zenasni %A Khalid Nasri %A Omar Oussouaddi %T Physics-based plasticity model incorporating microstructure changes for severe plastic deformation %J Comptes Rendus. Mécanique %D 2019 %P 601-614 %V 347 %N 8 %I Elsevier %R 10.1016/j.crme.2019.06.001 %G en %F CRMECA_2019__347_8_601_0
Ziyad Zenasni; Mohamed Haterbouch; Zoubir Atmani; Samir Atlati; Mohammed Zenasni; Khalid Nasri; Omar Oussouaddi. Physics-based plasticity model incorporating microstructure changes for severe plastic deformation. Comptes Rendus. Mécanique, Volume 347 (2019) no. 8, pp. 601-614. doi : 10.1016/j.crme.2019.06.001. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2019.06.001/
[1] Simulation of metal cutting using a physically based plasticity model, Model. Simul. Mater. Sci. Eng., Volume 18 (2010) no. 7
[2] Grain refinement under high strain rate impact: a numerical approach, Comput. Mater. Sci., Volume 48 (2010) no. 1, pp. 124-132
[3] Finite element modeling of microstructural changes in dry and cryogenic cutting of Ti6Al4V alloy, CIRP Ann., Volume 63 (2014) no. 1, pp. 69-72
[4] Characterization of strain rate effects in sheet laser forming, C. R. Mecanique, Volume 346 (2018), pp. 794-805
[5] Strain localization analysis for planar polycrystals based on bifurcation theory, C. R. Mecanique, Volume 346 (2018) no. 8, pp. 647-664
[6] Analysis of local behaviour in granular materials, C. R. Mecanique, Volume 342 (2014) no. 3, pp. 156-173
[7] Some experiments with the split Hopkinson pressure bar, J. Mech. Phys. Solids, Volume 12 (1964) no. 5, pp. 317-335
[8] Symposium Held in San Antonio, TX, USA, 6–8 September 1967 (1968)
[9] Opposite grain size dependence of strain rate sensitivity of copper at low vs high strain rates, Mater. Sci. Eng. A, Volume 738 (2018), pp. 430-438
[10] Strain rate effect on plastic deformation of nanocrystalline copper investigated by molecular dynamics, Mater. Sci. Eng. A, Struct. Mater.: Prop. Microstruct. Process., Volume 648 (2015), pp. 23-30
[11] Effect of geometrically necessary dislocations on inelastic strain rate for torsion stress relaxation of polycrystalline copper in micro scale, Mater. Sci. Eng. A, Struct. Mater.: Prop. Microstruct. Process., Volume 726 (2018), pp. 137-142
[12] Effect of strain rate and deformation temperature on strain hardening and softening behavior of pure copper, Trans. Nonferr. Met. Soc. China, Volume 26 (2016) no. 4, pp. 1044-1054
[13] The effects of strain rate and grain size on nanocrystalline materials: a theoretical prediction, Mater. Des., Volume 87 (2015), pp. 49-52
[14] Experiments on strain rate history and temperature effects during the plastic deformation of close-packed metals, J. Appl. Mech., Volume 45 (1978) no. 1, pp. 60-66
[15] Deformation temperature and strain rate sequence experiments on OFHC Cu, Int. J. Plast., Volume 15 (1999), pp. 375-399
[16] Modeling temperature and strain rate history effects on OFHC Cu, Int. J. Plast., Volume 15 (1999), pp. 575-603
[17] A dislocation-based model for all hardening stages in larges strain deformation, Acta Mater., Volume 46 (1998), pp. 5509-5522
[18] Modelling microstructure evolution toward ultrafine crystallinity produced by severe plastic deformation, J. Mater. Sci., Volume 42 (2007), pp. 1512-1516
[19] Strain gradient plasticity modelling of high-pressure torsion, J. Mech. Phys. Solids, Volume 56 (2008), pp. 1186-1202
[20] Dislocation density-based finite element analysis of large strain deformation behavior of copper under high-pressure torsion, Acta Mater., Volume 76 (2014), pp. 281-293
[21] Grain refinement under high strain rate impact: a numerical approach, Comput. Mater. Sci., Volume 48 (2010), pp. 124-132
[22] Continuous dynamic recrystallization during severe plastic deformation, Mech. Mater., Volume 90 (2015), pp. 148-156
[23] Caractérisation expérimentale et modélisation du comportement du cuivre en grande déformation: sensibilité à la vitesse, University of Metz, France, 1992 (Ph.D. Thesis)
[24] The Hague, The Netherlands (1983), pp. 12-21
[25] A constitutive description of the deformation of copper based on the use of the mechanical threshold as an internal state variable, Acta Metall., Volume 36 (1988) no. 1, pp. 81-93
[26] Flow stress of OFE copper at strain rates from 10−3 to 104 s−1: grain-size effects and comparison to the mechanical threshold stress model, Acta Metall. Mater., Volume 39 (1991), pp. 2337-2348
[27] Kinetics of flow and strain-hardening, Acta Metall., Volume 29 (1981), pp. 1865-1875
[28] On the sensitivity of f.c.c. metals, instantaneous rate sensitivity and rate sensitivity of strain Hardening, J. Mech. Phys. Solids, Volume 34 (1986), pp. 29-54
[29] Discussion of microstructural effects and their modeling at high rates of strain, Inst. Phys. Conf. Ser., Volume 102 (1988), p. 283
[30] O. Oussouaddi, J.R. Klepaczko, Analysis of transition between the isothermal and adiabatic deformation in the case of torsion of a tube, J. Phys. IV 1, 323–334.
[31] Bakerian lecture: The distortion of an aluminium crystal during a tensile test, Proc. R. Soc. Lond. A, Math. Phys. Eng. Sci., Volume 102 (1923), pp. 643-667
[32] Stage IV work hardening in cell forming materials, part I: features of the dislocation structure by X-ray line broadening, Scr. Mater., Volume 35 (1996), pp. 1461-1466
[33] Dislocation cell formation in metals, J. Appl. Phys., Volume 41 (1970), p. 3197
[34] Modeling of grain refinement in aluminum and copper subjected to cutting, Comput. Mater. Sci., Volume 50 (2011) no. 10, pp. 3016-3025
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