In recent times, developments in smart material technology have led to examination of many new and promising concepts for actuators, using piezoceramic material [1][2][3][4][5]. The most common form of a piezoceramic actuator is either a single thin sheet or a number of discrete rectangular patches, in order to provide sufficient force input. One of the major drawbacks of the single sheet form is the modal phase cancellation which severely restricts the control capability for higher vibration modes of the structure. On the other hand, discrete patches require careful management of higher modes and as a result, the control schemes become highly involved and difficult to implement. A single piezoelectric patch, whether one-sided, or in the bimorph form, has a fairly low voltage-strain sensitivity and hence cannot generate a large control force. In practice, this sensitivity is further eroded due to incomplete strain transfer from structure to the patch, arising out of the characteristics of the bond material. One way of increasing the actuator sensitivity is to use very high input voltages, but this can lead to problems of patch burning as well as additional safety requirements while working with high voltages. Another way is to use a larger number of layers at the same point, one below the other in the thickness direction, which increase the force output for the same input voltage. Further, in many practical applications, it is desired that such patches should be embedded into the surface in order to retain its original shape and these two together have given rise to the concept of multilayered piezoelectric insert. The present study investigates the non-dimensional voltagemoment sensitivity of such inserts, for various values of patch thickness and modulus ratio, for application as an actuator for vibration control in thin-walled beam-type structures.