Abstract
In this paper, the Gurtin variational principle is used to compute dynamic stress intensity factors. The two-order ordinary differential equations of coefficients An(t) are obtained by the Gurtin variational principle. These equations are solved by the modal superposition method and the main item Al(t) is obtained, then we can obtain dynamic stress intensity factors: Kl(t) = √2πaAl(t). The numerical computation example is given and the results are compared with other published results. The comparison shows that the method in this paper is very successful and efficient.
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