Investigation of surface motion in solids caused by reflection of an intense acoustic pulse at a pressure release surface
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This work reports theoretical investigations of the surface motion in solids caused by reflection of an intense acoustic pulse at a pressure release surface done using the surface velocity reflection coefficient. A formula was derived for the surface velocity reflection coefficient which relates the surface particle velocity for an incident compression wave to the particle velocities of the incident and reflected waves. To obtain the surface profiles, two different assumptions were used. The first assumption was the conventional one. In this assumption, surface motion was neglected during the period that the pulse strikes the surface and it is called the fixed surface approximation. The second assumption is to consider the motion and distortions of the surface and is called the moving surface approximation. Four different materials were investigated and the results were compared for different materials and in the two different approximations.
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