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Reflection of an impulsive SH wave at a moving edge. (English) Zbl 1203.74072
Author’s abstract: Wave reflection at a moving surface edge of an elastic solid is discussed. Assuming a uniform edge motion and no additional disturbance due to the motion, an exact closed-form solution for reflected SH waves is obtained. Its solution procedure is slightly different from the standard Cagniard-de Hoop technique, but time development of wavefront shape is extracted exactly. In addition to the regular reflected wave, a pulse-like wave is found. It appears when a ray with a critical incident angle hits the moving edge and has a flat front. It is also shown that an imaginary source of the reflected wave is stationary, in spite of the reflector (edge) motion.

74J20 Wave scattering in solid mechanics
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