Flutter Analysis of CNT-Reinforced Functionally Graded Composite Wing with Attached Mass

In this study, flutter of functionally graded carbon nanotube (FG-CNT)-reinforced composite wing carrying a distributed patch mass is analyzed and presented. Wing is modeled by a rectangular plate with cantilever boundary conditions in supersonic flow. To evaluate the displacement fields of the moderately thick plate, First-order shear deformation theory (FSDT) and chebyshev polynomials series are applied. In supersonic airflow simulation effect, the first-order piston theory was used and differential equation governing the system was adapted, using the Hamilton principle. In this study, 4 different types of CNT are considered through the thickness. CNT distribution patterns are as uniform, decreasing, decreasing-increasing, and increasing-decreasing. Finally, the effects of size, mass, and location of the distributed patch mass as well as various CNT distributions and fiber orientation angle in a two-layer anti-symmetric composite on flutter boundaries were studies. In comparisons with the results of previous studies, a good agreement is observed. The results showed that the flutter boundary reduced with increasing mass ratio and increased in longer length of added mass. By increasing orientation's angle of CNT fiber of anti-symmetric composite, the flutter boundary is raised and has different behavior for different distribution patterns.