The model is validated by comparing with existing results do cumented in the literature. Some numerical results are presented. It is concluded that the shape of the piezoelectric laminated composite plates can reach the desired shape through passive control or active control. The influence of stacking sequence of composite plates and posit ion of piezoelectric layers and sensors/actuators patches on the response of the piezoelectric composite plates is evaluated. | Vietnam Journal of Mechanics, VAST, Vol. 30, No. 3 (2008), pp. 133 – 141 A NEW APPROACH FOR INVESTIGATING CORRUGATED LAMINATED COMPOSITE PLATES OF WAVE FORM Dao Huy Bich Vietnam National University, Hanoi Khuc Van Phu Military Logistic Academy Abstract. Corrugated plates of wave form made of isotropic elastic material were considered as flat orthotropic plates with corresponding orthotropic constants determined empirically by the Seydel’s technique. In some recent researches the extension of this technique was given for corrugated laminated composite plates. In the present paper a new approach for investigating corrugated composite plate of wave form is proposed, regarding this plates as a combination of parts of shallow cylindrical shells with alternative curvatures. It reduces to no use of Seydel’s empirical formulas and sufficiently apply to composite plates. Based on this approach governing equations of corrugated laminated composite plate of wave form are developed and application to the non-linear stability problem of this plate is considered. Obtained results are compared with those of Seydel’s technique. 1. INTRODUCTION Corrugated plates of wave form made of isotropic elastic material were considered as flat orthotropic plates with corresponding orthotropic constants determined empirically by Seydel’s technique. This approach was acceptable to solve many bending and stability problems of corrugated isotropic elastic plates in practice [4, 5, 7]. However, the analysis of corrugated laminated composite plates has received comparitively little attention. In [1] the authors developed the Seydel’s technique to the bending problems of corrugated laminated composite plates and cylindrical shells. In the stability problem of corrugated laminated composite plates [2] besides bending stiffnesses to be extended it is necessary to formulate extensional stiffnesses and to define more exactly the strain expression by including the curvature of middle surface of .
