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On the structure of the spectrum for the elasticity problem in a body with a supersharp spike. (Russian, English) Zbl 1224.35395
Sib. Mat. Zh. 50, No. 4, 746-756 (2009); translation in Sib. Math. J. 50, No. 4, 587-595 (2009).
Summary: We establish that the continuous spectrum of the Neumann problem for the system of elasticity equations occupies the entire closed positive real semiaxis in the case that a three-dimensional body with a sharp-spiked cusp whose cross-section contracts to a point with the velocity \(O(r^{1+\gamma})\), where \(r\) is the distance to the vertex of the spike and \(\gamma > 1\) is the sharpness exponent.

35Q74 PDEs in connection with mechanics of deformable solids
35P05 General topics in linear spectral theory for PDEs
74B05 Classical linear elasticity
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