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An Experimental and Numerical Investigation of Deformation Mechanics on Hole-Flanging Process of AA6061-T6 Sheets through Single-Point Incremental Forming | ||
| Journal of Stress Analysis | ||
| دوره 6، شماره 1، 2021، صفحه 29-46 اصل مقاله (7.32 M) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.22084/jrstan.2021.24756.1188 | ||
| نویسندگان | ||
| S.E. Seyyedi؛ M. Bakhshi-Jooybari* ؛ H. Gorji؛ M.J. Mirnia | ||
| Mechanical Engineering Department, Babol Noshirvani University of Technology, Babol, Mazandaran, Iran. | ||
| چکیده | ||
| Incremental forming process, as one of the methods used for forming complex parts in rapid prototyping, has various applications in the automotive and aerospace industries. The incremental forming process can be used to flange a metal sheet that, compared to conventional flanging, not only increases the formability but also does not require expensive dedicated dies. The deformation and damage mechanisms in the incremental forming process are completely different from conventional forming processes and need exact and thorough investigation. The present study is aimed at evaluating the damage and deformation mechanics in the hole-flanging process by single-stage and multistage incremental forming on AA6061-T6 sheets, considering several parameters affecting damage and fracture, including equivalent plastic strain, stress triaxiality, and lode angle parameter. These important parameters can reveal the stress and strain states as well as the deformation mechanism, which have been less addressed in the hole-flanging by incremental forming. The results indicated that the stress and strain states varied in different regions of the flange wall, such that the strain state was as plane strain at the bottom of the wall in contact with the unformed part of the sheet, biaxial tensile state at the middle of the wall, and uniaxial tensile state at the top of the wall on flange edge. The highest damage was observed at the flange edges, and the fracture occurred at low values of stress triaxiality in this area, indicating the shear fracture in the hole-flanging of AA6061-T6 sheets during the incremental forming. Finally, a slight increase was observed in the forming limit by forming with a multistage strategy instead of the single-stage one, although the equivalent plastic strain increased significantly. | ||
| کلیدواژهها | ||
| Single Point Incremental Forming (SPIF)؛ Hole-flanging؛ Deformation mechanics؛ Stress and strain state؛ FE simulation | ||
| مراجع | ||
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[1] J. Jeswiet, F. Micari, G. Hirt, A. Bramley, J. Duflou, J. Allwood, Asymmetric single point incremental forming of sheet metal, CIRP Ann. Manuf. Technol., 54(2) (2005) 88-114. [2] W.C. Emmens, G. Sebastiani, A.H. van den Boogaard, The technology of incremental sheet forming-a brief review of the history, J. Mater. Process. Technol., 210(8) (2010) 981-997. [3] T. McAnulty, J. Jeswiet, M. Doolan, Formability in single point incremental forming: A comparative analysis of the state of the art, CIRP J. Manuf. Sci. Technol., 16 (2017) 43-54. [4] J.R. Duflou, A.M. Habraken, J. Cao, R. Malhotra, M.Bambach, D. Adams, H. Vanhove, A. Mohammadi, J. Jeswiet, Single point incremental forming: state-of-the-art and prospects, Int. J. Mater. Form., 11(6) (2018) 743-773. [5] Y.M. Huang, K.H. Chien, The formability limitation of the hole-flanging process, J. Mater. Process. Technol., 117(1-2) (2001) 43-51. [6] G. Centeno, M.B. Silva, V.A.M. Cristino, C. Vallellano, P.A.F. Martins, Hole-flanging by incremental sheet forming, Int. J. Mach. Tools Manuf., 59 (2012) 46-54. [7] L. Montanari, V.A. Cristino, M.B. Silva, P.A.F. Martins, A new approach for deformation history of material elements in hole-flanging produced by single point incremental forming, Int. J. Adv. Manuf. Technol., 69(5-8) (2013) 1175-1183. [8] M.B. Silva, P. Teixeira, A. Reis, P.A.F. Martins, On the formability of hole-flanging by incremental sheet forming, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 227(2) (2013) 91-99. [9] M. Borrego, D. Morales-Palma, A.J. MartínezDonaire, G. Centeno, C. Vallellano, Experimental study of hole-flanging by single-stage incremental sheet forming, J. Mater. Process. Technol., 237 (2016) 320-330. [10] T. Cao, B. Lu, H. Ou, H. Long, J. Chen, Investigation on a new hole-flanging approach by incremental sheet forming through a featured tool, Int. J. Mach. Tools Manuf., 110 (2016) 1-17. [11] V.A. Cristino, L. Montanari, M.B. Silva, A.G. Atkins, P.A.F. Martins, Fracture in hole-flanging produced by single point incremental forming, Int. J. Mech. Sci., 83 (2014) 146-154. [12] A.J. Martínez-Donaire, M. Borrego, D. MoralesPalma, G. Centeno, C. Vallellano, Analysis of the influence of stress triaxiality on formability of holeflanging by single-stage SPIF, Int. J. Mech. Sci., 151 (2019) 76-84. [13] P.K. Gandla, S. Kurra, K.S. Prasad, S.K. Panda, S.K. Singh, Effect of pre-cut hole diameter on deformation mechanics in multi-stage incremental hole flanging of deep drawing quality steel, Arch. Civ. Mech. Eng., 21(1) (2021) 16. [14] M.J. Mirnia, M. Shamsari, Numerical prediction of failure in single point incremental forming using a phenomenological ductile fracture criterion, J. Mater. Process. Technol., 244 (2017) 17-43. [15] L. Xue, Ductile fracture modeling: theory, experimental investigation and numerical verification, Ph.D. Thesis, Massachusetts Institute of Technology. Department of Mechanical Engineering, Cambridge, USA, (2007). [16] Y. Bai, Effect of loading history on necking and fracture, Ph.D. Thesis, Massachusetts Institute of Technology. Department of Mechanical Engineering, Cambridge, USA, (2008). [17] Y. Bai, T. Wierzbicki, Application of extended Mohr–Coulomb criterion to ductile fracture, Int. J. Fract., 161(1) (2010) 1-20. [18] Y. Bao, T. Wierzbicki, On fracture locus in the equivalent strain and stress triaxiality space, Int. J. Mech. Sci., 46(1) (2004) 81-98. [19] T. Wierzbicki, Y. Bao, Y.W. Lee, Y. Bai, Calibration and evaluation of seven fracture models, Int. J. Mech. Sci., 47(4-5) (2005) 719-743. [20] T. Coppola, L. Cortese, P. Folgarait, The effect of stress invariants on ductile fracture limit in steels, Eng. Fract. Mech., 76(9) (2009) 1288-1302. [21] I. Barsoum, J. Faleskog, Rupture mechanisms in combined tension and shear-Experiments, Int. J. Solids Struct., 44(6) (2007) 1768-1786. [22] K.S. Zhang, J.B. Bai, D. Francois, Numerical analysis of the influence of the Lode parameter on void growth, Int. J. Solids Struct., 38(32-33) (2001) 5847-5856. [23] W.C. Emmens, A.H. van den Boogaard, An overview of stabilizing deformation mechanisms in incremental sheet forming, J. Mater. Process. Technol., 209(8) (2009) 3688-3695. [24] F. Maqbool, M. Bambach, Dominant deformation mechanisms in single point incremental forming (SPIF) and their effect on geometrical accuracy, Int. J. Mech. Sci., 136 (2018) 279-292. [25] M.J. Mirnia, M. Vahdani, Calibration of ductile fracture criterion from shear to equibiaxial tension using hydraulic bulge test, J. Mater. Process. Technol., 280 (2020) 116589. [26] H. Talebi-Ghadikolaee, H.Moslemi Naeini, M.J. Mirnia, M.A. Mirzai, S. Alexandrov, H. Gorji, Experimental and numerical investigation of failure during bending of AA6061 aluminum alloy sheet using the modified Mohr-Coulomb fracture criterion, Int. J. Adv. Manuf. Tech., 105(12) (2019) 5217-5237. [27] R. Hill, A theory of the yielding and plastic flow of anisotropic metals, Proc. Math. Phys. Eng. Sci., 193(1033) (1948) 281-297. [28] S. Bagherzadeh, M.J. Mirnia, B. Mollaei Dariani, Numerical and experimental investigations of hydro-mechanical deep drawing process of laminated aluminum/steel sheets, J. Manuf. Process., 18 (2015) 131-140. [29] D. Morales-Palma, C. Vallellano, F.J. GarcíaLomas, Assessment of the effect of the throughthickness strain/stress gradient on the formability of stretch-bend metal sheets, Mater. Des., 50 (2013) 798-809. [30] D.Y. Seong, M.Z. Haque, J.B. Kim, T.B. Stoughton, J.W. Yoon, Suppression of necking in incremental sheet forming, Int. J. Solid Struct., 51(15-16) (2014) 2840-2849. [31] F. Zhalehfar, S.J. Hosseinipour, S. Nourouzi, A.H. Gorji, A different approach for considering the effect of non-proportional loading path on the forming limit diagram of AA5083, Mater. Des., 50 (2013) 165-173. [32] K.A. Al-Ghamdi, G. Hussain, Threshold toolradius condition maximizing the formability in SPIF considering a variety of materials: experimental and FE investigations, Int. J. Mach. Tools Manuf., 88 (2015) 82-94. | ||
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