SHEAR-WAVES IN AN ELASTIC VISCOELASTIC SANDWICH PLATE

This paper examines transient shear wave propagation in a three layer sandwich plate consisting of a viscoelastic core bounded by identical elastic outer layers. The disturbance is initiated by an impulsive tan gential line load applied to the upper surface of the plate. Results f or various values of the viscoelastic time constants of the core are p resented. These shows the variation of the lower surface displacements with time, at fixed observer stations. The results indicate that, for some vales of the time constants, the viscoelastic core provides effe ctive dumping of the transients, while for other values the jumping is virtually non-existent.