Asymmetric laminate with MS layer away from the mid plane
An 11 layer asymmetric laminate [45/-45/0/0/90/90/0/0/-45/m/45] with MS layer in the 10th layer from the top is subjected to only actuating current. The stress, strain and voltage profiles in the MS layer are presented in Figures 33.1, 33.2 and 33.3.
Figure 33.1: Stress variations at various interfaces and in MS layer at the time of delamination when the laminate is subjected to only actuator current
Figure 33.2: Strain variations at various interfaces and in MS layer at the time of delamination when the laminate is subjected to only actuator current
Figure 33.3: Open circuit voltage in MS layer at the time of delamination when the laminate is subjected to only actuator current (with and without bending consideration)
When subjected to only actuating current, the delamination is predicted to take place at the eighth interface at a stress value of 23.7 MPa. The voltage response in sensing coil is 137 mV. The voltage response was obtained by not considering the bending effect. Thus, effect of curvature on mid plane strain was not added. Without bending consideration an open circuit voltage of 172 mV is predicted in the numerical analysis. |
