Effect of temperature and moisture on static and dynamic behavior of delaminated composite structure and control using integrated AFC

In the present study, static, dynamic, and control analysis of delaminated composite plate structure subjected to hygral and thermal loading is done using the active fiber composite (AFC) patches. The FE modeling of smart composite plates with delamination is done considering the displacement fields as per the shear deformation theory and delamination are modeled using a region-wise approach. For static bending and control analysis, the hygrothermal load and AFC (actuator voltage) load are considered as direct external loads using the given temperature and moisture expansion coefficients. But in the case of dynamic analysis, the hygrothermal loading is employed as preload (i.e., the alteration in the stiffness matrix of laminate because of temperature and moisture level is annexed by the geometric stiffness matrix). The active dynamic control analyses are performed considering the proportional derivative control algorithms. It has been observed that the deformation due to various loading conditions is controlled by voltage-induced actuators. The deformation behavior of delamination sub-laminates is shown under different loading and hygrothermal conditions.