The Characteristic Of Wave Propagation In Piezoelectric Laminated Structures And Carbon Nanotubes

The piezoelectric composite laminated structures exhibit superior mechanical properties particularly their high strength-to-weight ratio, easy incorporation and good shock absorption, etc. They are applied in many areas of engineering including aerospace, automotive, civil, and others. The discovery of carbon nanotube (CNTs) has attracted wide attention and stimulated extensive studies due to their unique properties, such as perfect structures, small scale, light mass, especially high strength, stiffness as well as promising electronic property, high vibration frequency which can reaches THz (1THz=1012 Hz). So understanding the characteristics of wave propagation in piezoelectric composite laminated structures and carbon nanotube is very meaningful and helping to use them better in engineering.The main work in dissertation includes:(1) Based on Cooper-Naghdi shell theory, a dynamic model of laminated piezoelectric cylindrical shell is derived considering the effects of transverse shear and rotary inertia. The wave characteristics curves are obtained by solving an eigenvalue problem. The effects of layer numbers, thickness of piezoelectric layers, thermal and humid environment on wave characteristics curves are discussed through numerical results; The influence of nonlinear large deformation on wave propagation in piezoelectric cylindrical laminated shells is studied based on the minimum potential energy variational principle and compared with linear theory. The effect of layers numbers and the stacking sequence of...