Numerical Computation of Dynamic Stress Intensity Factors Based on the Equations of Motion in Convolution Integral

시간적분형 운동방정식을 바탕으로 한 동적 응력확대계수의 계산

  • Published : 2002.05.01


In this paper, the dynamic stress intensity factors of fracture mechanics are numerically computed in time domain using the FEM. For which the finite element formulations are derived applying the Galerkin method to the equations of motion in convolution integral as has been presented in the previous paper. To assure the strain fields of r$^{-1}$ 2/ singularity near the crack tip, the triangular quarter-point singular elements are imbedded in the finite element mesh discretized by the isoparametric quadratic quadrilateral elements. Two-dimensional problems of the elastodynamic fracture mechanics under the impact load are solved and compared with the existing numerical and analytical solutions, being shown that numerical results of good accuracy are obtained by the presented method.


Dynamic Stress Intensity Factor;FEM;Convolution Integral;Singular Element


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