Abstract
Two-dimensional impulsive stresses are analyzed by the boundary element method with the Laplace transformation and the numerical inverse transformation using the fast Fourier transformation. The condition of the stability between the length of the element and the time step is given by the analysis. The validity of the condition is confirmed by the numerical results. Under the consideration of this condition, the dynamic stress concentration factors of the circular hole, the elliptic hole and the elliptic notch in a strip are obtained from the surface forces and the tangential derivatives of surface displacements. It is shown that the dynamic stress concentrations are approximately ten percent larger than the static ones.
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More From: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
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