Numerical Analysis of Stress Field around Crack Tip under Impact Load

충격하중에 의해 크랙 주위에 형성되는 응력장에 관한 수치해석적 연구

  • Hwang, Gap-Woon (Graduate School of Chonnam National Universityisy) ;
  • Cho, Kyu-Zong (Dept.of Mechanical Engineering, Chonnam National Universityisy)
  • 황갑운 (전남대학교 대학원 기계설계학과) ;
  • 조규종 (전남대학교 기계공학과)
  • Published : 1996.02.01


To investigate the effect of stress wave propagation for crack tip, impact responses of two-dimensional plates with oblique cracks are investigated by a numerical method. In the numerical analysis, the finite element method is used in space domain discretization and the Newmark constant acceleration algorithm is used in time integration. According to the numerical results from the impact response analysis. it is found that the stress fields are bisected at the crack surface and the parts of stress intensity are moved along the crack face. The crack tip stress fields are yaried rapidly. The magnitude of crack tip stress fields are converted to dynamic stress intensity factor. Dynamic sress intensity factor appears when the stress wave has reached at the crack tip and the aspect of change of dynamic stress intensity factor is shown to be the same as the part of the flow of stress intensity.


Stress Wave;Impact Resistance;Crack Tip Stress Field;Stress Intensity;Dynamic Stress Intensity Factor


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