Modified Johnson-Cook Model Incorporated With Electroplasticity for Uniaxial Tension Under a Pulsed Electric Current

다국어 초록 (Multilingual Abstract)

An empirical expression describing the electroplastic deformation behavior is suggested based on the Johnson-Cook (JC) model by adding several functions to consider both thermal and athermal electric current effects. Tensiledeformation behaviors are carried out for an AZ31 magnesium alloy and an Al-Mg-Si alloy under pulsed electriccurrent at various current densities with a fixed duration of electric current. To describe the flow curves underelectric current, a modified JC model is proposed to take the electric current effect into account. Phenomenologicaldescriptions of the adopted parameters in the equation are made. The modified JC model suggested in the presentstudy is capable of describing the tensile deformation behaviors under pulsed electric current reasonably well.

참고문헌 (Reference)

1 O. A. Troitskii, 10 : 18-, 1969

2 I. Ulaciaa, 211 : 830-, 2011

3 W. A. Salandro, 132 : 051016-, 2010

4 C. D. Ross, 129 : 342-, 2007

5 S.-T. Hong, 64 : 277-, 2015

6 W. Kim, 63 : 273-, 2014

7 V. I. Dubinko, 72 : 1188-, 2008

8 M.-J. Kim, 75 : 58-, 2014

9 M.-J. Kim, 94 : 148-, 2017

10 J. Magargee, 135 : 041003-, 2013

11 R. Fan, 574 : 218-, 2013

12 T. J. Kronenberger, 131 : 031003-, 2009

13 C. Bunget, 38 : 647-, 2010

14 W. A. Salandro, 133 : 041008-, 2011

15 J.-H. Roh, 58 : 84-, 2014

16 K. Hariharan, 46 : 3043-, 2015

17 H. Conrad, 287 : 276-, 2000

18 G. R. Johnson, 541-547, 1983

19 "Standard E8/E8M-09, Standard Test Methods for Tension Testing of Metallic Materials"

20 Jingwei Zhao, "Flow Behaviour and Constitutive Modelling of a Ferritic Stainless Steel at Elevated Temperatures" 대한금속·재료학회 22 (22): 474-487, 2016

21 Yumei Hu, "Experiments and FEM Simulations of Fracture Behaviors for ADC12 Aluminum Alloy Under Impact Load" 대한금속·재료학회 22 (22): 1015-1025, 2016