SHAPE CONTROL OF COMPOSITE PLATES AND SHELLS WITH EMBEDDED ACTUATORS .1. VOLTAGES SPECIFIED

The changes in shapes of fiber-reinforced composite beams, plates and shells affected by embedded piezoelectric actuators were investigated. An analytical method was developed which can be used to calculate the changes in shapes for specified applied voltages to the actuators. Th e method is formulated on the basis of mathematical models using two-d imensional, linear, shallow shell theory including transverse shear ef fects which are important in the case of sandwich construction. Soluti ons to the governing equations were obtained via the Ritz method. A co mputationally efficient computer code with a user-friendly interface w as written which is suitable for performing the numerical calculations . The code, designated as SHAPE1, provides the change in shape for spe cified applied voltages. To validate the method and the computer code, results generated by the code were compared to existing analytical an d experimental results and to test data obtained during the course of the present investigation. The predictions provided by the SHAPE1 code were in excellent agreement with the results of the other analyses an d data.