Postbuckling of cross-ply laminated cylindrical shells with piezoelectric actuators under complex loading conditions

✍ Scribed by Hui-Shen Shen; Q.S. Li

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 681 KB
• Volume: 44
• Category: Article
• ISSN: 0020-7403
• DOI: 10.1016/s0020-7403(02)00056-5

✦ Synopsis

A postbuckling analysis is presented for a cross-ply laminated cylindrical shell with piezoelectric actuators subjected to the combined action of mechanical, electric and thermal loads. The temperature ÿeld considered is assumed to be a uniform distribution over the shell surface and through the shell thickness and the electric ÿeld is assumed to be the transverse component E z only. The material properties are assumed to be independent of the temperature and the electric ÿeld. The governing equations are based on the classical shell theory with a von Kà armà an-Donnell-type of kinematic nonlinearity. The nonlinear prebuckling deformations and initial geometric imperfections of the shell are both taken into account. A boundary layer theory of shell buckling, which includes the e ects of nonlinear prebuckling deformations, large de ections in the postbuckling range, and initial geometric imperfections of the shell, is extended to the case of hybrid laminated cylindrical shells. A singular perturbation technique is employed to determine the buckling loads and postbuckling equilibrium paths. The numerical illustrations concern the postbuckling behavior of perfect and imperfect, cross-ply laminated cylindrical thin shells with fully covered or embedded piezoelectric actuators subjected to combined mechanical loading of external pressure and axial compression, and under di erent sets of thermal and electric loading conditions. The e ects played by temperature rise, applied voltage, shell geometric parameter, stacking sequence, as well as initial geometric imperfections are studied.