Abstract
Rice et al. [1] studied a perturbation problem for the wave equation in a space containing a moving discontinuity surface. We analyse the solutions of the wave equation in a 3D layer, which contains a “crack” propagating dynamically, using the singular perturbation technique developed by Willis and Movchan [3]. The dynamic weight function is discussed for time-dependent Neumann boundary conditions on a semi-infinite “crack” extending at a constant speed V in a 3D layer. The Fourier transform of the weight function is constructed by solving a scalar Wiener-Hopf problem. In this case the weight function is no longer homogeneous (due to the geometry considered). Within the first order perturbation theory framework, a relationship between the intensity factor and a small time-dependent perturbation of the “crack” front is found; we also analyse the transfer function which relates the “crack” front position and the energy release rate.
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References
Rice, J.R., Ben-Zion, Y. and Kim, K.S., (1994) “Three-dimensional perturbation solution for a dynamic crack moving unsteadily in a model elastic solid”, J. Mech. Phys. Solids, Vol. 42, No. 5, 814–843.
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© 2003 Kluwer Academic Publishers
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Bercial-Velez, J.P. (2003). Asymptotic Analysis of a “Crack” in a Layer of Finite Thickness. In: Movchan, A.B. (eds) IUTAM Symposium on Asymptotics, Singularities and Homogenisation in Problems of Mechanics. Solid Mechanics and Its Applications, vol 113. Springer, Dordrecht. https://doi.org/10.1007/1-4020-2604-8_11
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DOI: https://doi.org/10.1007/1-4020-2604-8_11
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-1780-3
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