Higher-order B-spline strip models for laminated composite structures withintegrated sensors and actuators

This paper deals with the development of families of higher- and first-orde r isoparametric B-spline finite strip models, applied to the static and fre e vibration analysis of composite laminated plate/shell structures, which c an have arbitrary lay-ups, loading and boundary conditions. The models cons ider the possibility of existing embedded and/or surface bonded piezoelectr ic actuators and sensors, enabling for the passive control of parameters, s uch as displacements and natural frequencies of this type of structures. Th e structure is discretised in a finite number of strips and the geometry an d the displacement components of each strip are represented through interpo lating functions. These functions are products of linear or cubic B-spline functions and linear or quadratic Lagrange functions along the local y, x a xes of each section within a strip, respectively. The whole structure is mo delled through the assembly of a finite number of flat section strips. The accuracy and capability of the models will be discussed through two illustr ative examples. (C) 2001 Elsevier Science Ltd. All rights reserved.