Method for identification of elastic properties of laminates based on experiment design

A numerical-experimental method for the identification of mechanical proper ties of laminated composites from the experimental results is developed. Fo r the first time it is proposed to use the experiment design to solve the i dentification (inverse) problems. The basic idea of the proposed approach i s that simple mathematical models (response surfaces) are determined only b y using the finite element solutions in the reference points of the experim ent design. Therefore, a significant reduction (about 50-100 times) in calc ulations of the identification functional can be achieved in comparison wit h the conventional methods of minimization. Numerical examples of identific ation of elastic properties of different laminates from the measured eigenf requencies of plates are discussed. (C) 1999 Elsevier Science Ltd. All righ ts reserved.