Nonlinear Finite Element Modeling of Charpy Impact Test


Article Preview

Finite element modeling of Charpy impact test was performed for a normalized carbon steel specimen based on plane strain geometry and bilinear isotropic hardening plasticity. As the suggested approach takes into account all aspects of nonlinearity such as geometric, material and contact nonlinearities, it may describe the conventional destructive impact test accurately with much less effort and cost. A failure criterion is assumed to be at 10 % of plastic strain based on the tensile experiment data. Impact energy was estimated at different testing temperatures. It was found that impact energy required for fracture of the selected steel specimen at room temperature (i.e. 25 °C) is to be 65.9 Joul. According to simulation results, it is found that the ductile to brittle transition temperature (DBTT) equals 0 °C. In order to validate the numerical model, a comparison study was established by comparing the numerical results with the corresponding experimental tests at the same conditions, which shows good match with maximum deviation of 5 % for all computer runs.



Advanced Materials Research (Volumes 83-86)

Edited by:

M. S. J. Hashmi, B. S. Yilbas and S. Naher




F. A. Ghaith, "Nonlinear Finite Element Modeling of Charpy Impact Test", Advanced Materials Research, Vols. 83-86, pp. 182-189, 2010

Online since:

December 2009





[1] T. Belytschko and HD. Bartel, Efficient large scale non-linear transient anlysis by finite element , International Journal of Numerical methods for Engineers. Vol. 10 (1976), pp.579-596.


[2] K. K. Mathur, A. Needleman and V. Tvergaard , 3D analysis of failure modes in the charpy impact test, Modelling and Simulation of Materials Science and Engineering. Vol. 2 (1994), pp.617-635.


[3] V. Tvergard and A. Needleman , Analysis of the charpy V-notch test for welds, Engineering Fracture Mechanics. Vol. 65 (2000), pp.627-643.


[4] T. Lorrit, Specimen loading detemined by displacement measurement in instrumented charpy impact test, Engineering Fracture Mechanics. Vol. 65 (2000), pp.703-713.


[5] W. Altenhof et al., Numerical Simulation of AM50A magnesium alloy under large deformation, International Journal of Impact Engineering Vol. 30 (2004), pp.117-142.


[6] Y. J. Chao et al, Charpy impact Energy, fracture and ductile-brittle transition temperature of dualphase590 Steel. Material and Design, Vol. 28 (2007), pp.551-557.


[7] ASTM E-23-99, Standard methods for notched bar impact testing of metallic materials.