Finite Element Simulation of Fracture Toughness Test

파괴인성시험의 유한요소 시뮬레이션

  • Chu, Seok Jae (School of Mechanical Engineering, Univ. of Ulsan) ;
  • Liu, Conghao (School of Mechanical Engineering, Univ. of Ulsan)
  • 주석재 (울산대학교 기계공학부) ;
  • 류총호 (울산대학교 기계공학부)
  • Received : 2012.08.30
  • Accepted : 2012.12.04
  • Published : 2013.04.01


Finite element simulations of tensile tests were performed to determine the equivalent stress - equivalent plastic strain curves, critical equivalent stresses, and critical equivalent plastic strains. Then, the curves were used as inputs to finite element simulations of fracture toughness tests to determine the plane strain fracture toughness. The critical COD was taken as the COD when the equivalent plastic strain at the crack tip reached a critical value, and it was used as a crack growth criterion. The relationship between the critical COD and the critical equivalent plastic strain or the reduction of area was found. The relationship between the plane strain fracture toughness and the product of the critical equivalent stress and the critical equivalent plastic strain was also found.


Plane Strain Fracture Toughness;Finite Element Simulation;Equivalent Stress;Equivalent Plastic Strain


Supported by : 울산대학교


  1. Sun, D. J., Park, M. K., Bahk, S. M. and Choi, Y. T., 1977, "Prediction of Elastic-Plastic Fracture Toughness for Metallic Material Using Finite Element Method," Journal of the Korean Institute of Gas, Vol. 1, No. 1, pp. 95-100.
  2. Farahmand, B. and Bockrath, G. E., 1996, "A Theoretical Approach for Evaluating the Plane Strain Fracture Toughness of Ductile Metals," Engineering Fracture Mechanics, Vol. 53, No. 6, pp. 975-990.
  3. Farahmand, B., 1997, Fatigue and Fracture Mechanics of High Risk Parts.
  4. Farahmand, B., Saff, C., Xie, D. and Abdi, F., 2007, "Estimation of Fatigue and Fracture Allowables For Metallic Materials Under Cyclic Loading, 48th AIAA / ASME / ASCE / AHS / ASC Structures, Structural Dynamics, and Materials Conference.
  5. Farahmand, B. and Nikbin, K., 2008, "Predicting Fracture and Fatigue Crack Growth Properties Using Tensile Properties," Engineering Fracture Mechanics, Vol. 75, pp. 2144-2155.
  6. Farahmand, B. ed., 2009, Virtual Testing and Predictive Modeling.
  7. Chu, S. J. and Liu, C., 2011, "Determination of True Stress-True Strain Curves from Tensile Tests with the Aid of Finite Element Analysis Simulation," Trans. Korean Soc. Mech. Eng. A, Vol. 35, No. 1, pp. 25-31.