Development of Finite Element Ductile Tearing Simulation Model Considering Strain Rate Effect

변형률 속도를 고려한 유한요소 기반 연성 찢김 해석 기법 개발

Nam, Hyun Suk;Kim, Ji Soo;Kim, Jin Weon;Kim, Yun Jae

  • Received : 2015.08.19
  • Accepted : 2015.12.07
  • Published : 2016.02.01


This paper proposes ductile failure simulation under high strain rate conditions using finite element (FE) analyses. In order to simulate a cracked component under a high strain rate condition, this paper applies the stress-modified fracture strain model combined with the Johnson/Cook model. The stress-modified fracture strain model determines the incremental damage in terms of stress triaxiality (${\sigma}_m/{\sigma}_e$) and fracture strain (${\varepsilon}_f$) for a dimple fracture using the tensile test results. To validate the stress-modified fracture strain model under dynamic loading conditions, the parameters are calibrated using the tensile test results under various strain rates and the fracture toughness test results under quasi-static conditions. The calibrated damage model predicts the CT test results under a high strain rate. The simulated results were then compared with the experimental data.


Ductile Fracture;Finite Element Analysis;High Strain Rate Condition;Damage Simulation


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Supported by : 한국연구재단, 한국에너지기술평가원(KETEP)