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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

Abstract

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.

Keywords

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

Acknowledgement

Supported by : 울산대학교

References

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