Experimental and analytical evaluation of the stress-strain curves of AA5754-T4 and AA6061-T6 by hydraulic bulge test

被引：5
作者：
Campos H. [1 ]
Santos A.D. [2 ]
Amaral R. [1 ]
机构：
[1] INEGI – Institute of Science and Innovation in Mechanical and Industrial Engineering, Rua Dr. Roberto Frias, 400, Porto
[2] FEUP – Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto
来源：
Campos, Hugo (ramaral@inegi.up.pt) | 1600年 / Elsevier B.V., Netherlands卷 / 29期
关键词：
Aluminium alloy; bulge test; sheet metal characterization; thickness evolution;
D O I：
10.1016/j.ctmat.2016.06.008
中图分类号：
学科分类号：
摘要：
The hydraulic bulge test can be used as a means to achieve large uniform plastic strains under biaxial stress conditions, applied to hardening curve determination of sheet metal materials. The larger information on hardening behaviour is the reason why a mechanical characterization system has been developed to determine stress-strain curve by reading bulge test variables: bulge pressure (p), radius of curvature (ρ) and pole thickness (t). The determination of stress-strain curve may be based on continuous data acquisition from bulge test results (p, ρ, t) or from the use of analytical equations relating these variables with dome height. In this paper it is presented a study comparing different methodologies to obtain stress-strain curve by means of analytical methodologies relating “dome height with pole thickness” evolution. It is shown that these existent methodologies to determine pole thickness don't apply when compared with experimental values and they show an evident dispersion among them. Therefore a better analytical methodology is proposed and tested. The study and corresponding material characterization is applied to two aluminium alloys, AA5754-T4 and AA6061-T6, currently used in automotive industry. © 2017 Portuguese Society of Materials (SPM)
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页码：e244 / e248
页数：4
相关论文
共 11 条
  • [1] Campos H., Santos A.D., Martis B., Mori K.I.N., Barlat F., Proceedings of WCCM XI – 11th World Congress on Computational Mechanics, Barcelona Spain, pp. 4223-4238, (2014)
  • [2] Santos A.D., Teixeira P., Barlat F., Proceedings of NUMIFORM 2010-10th International Conference on Numerical Methods in Industrial Forming Processes, pp. 845-852, (2010)
  • [3] Lemoine X., Iancu A., Ferron G., Proceedings of ESAFORM2011-14th International Conference on Materials Forming, pp. 1411-1416, (2011)
  • [4] Ranta-Eskola A.J., Int. J. Mech. Sci., 21, 8, (1979)
  • [5] Kular G.S., Hillier M.J., Int. J. Mech. Sci., 14, 10, (1972)
  • [6] Campos H., Santos A.D., Martins B.M.R., Pacheco J.B., Proceedings of CNME 2014-9° Congresso Nacional de Mecânica Experimental, Portugal, (2014)
  • [7] Hill R., Philos. Mag., 7, (1950)
  • [8] Gutscher G., Wu H.-C., Ngaile G., Altan T., J. Mater. Process. Technol., 146, 1, (2004)
  • [9] Koc M., Billur E., Cora O.N., Mater. Des., 32, 1, (2011)
  • [10] Pankin W., (1959)
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