SEGMENTED SENSORS AND ACTUATORS FOR THICK PLATES AND SHELLS PART I: ANALYSIS USING FSDT

✍ Scribed by G.P. DUBE; P.C. DUMIR; C. BALAJI KUMAR

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 154 KB
• Volume: 226
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1999.2314

✦ Synopsis

This paper presents modal sensitivity factors, actuation factors and controlled damping ratio for segmented distributed piezoelectric sensor and actuator layers laminated on simply supported thick rectangular plates and circular cylindrical shells made of cross-ply composite laminate. A Flugge-type "rst order shear deformation theory (FSDT) has been developed including rotary inertia of the elastic plies and inertia, sti!ness and piezoelectric e!ects (direct and converse) of the piezoelectric layers. Plates and shells with any cross-ply lamination scheme (symmetric/unsymmetric) are considered with the piezoelectric sensor and actuator layers rectangularly segmented. The Navier-type solution is obtained for the case of velocity feedback using modal "ltering. Analytical expressions for modal membrane and bending sensitivity factors, membrane and bending actuation factors and controlled damping ratio are developed for cylindrical shells using FSDT and classical lamination theory. The contribution of the in-plane displacement components is included. The results for plates are obtained as a particular case of the results for circular cylindrical shells.