Delamination Sensing with Piezoelectric Sensory Layer
A numerical analysis has been carried out to determine the damage, its location and severity on the basis of voltage signal recorded for damages induced in various elements and these signals have been compared with the responses from healthy laminates.
A kevlar / polyethylene composite laminate with stacking sequence [0/45/-45/0] is used in the numerical analysis for determining the voltage profile of the damaged locations. Each element is subjected to known delamination to compare the voltage profiles from the healthy and the damaged composites.
Two different laminate configurations have been used in the numerical analysis. The first configuration has elements placed in symmetrical positions with respect to the vertical line dividing the laminate in two equal parts. The second configuration has a diagonal symmetry. Both the laminate configurations with boundary conditions are shown in Figure 25.1.
Figure 25.1: Laminate configurations used in numerical analysis |
