TY - EJOU
AU - Xia, Wei
AU - Kong, Weilin
AU - Feng, Yupeng
AU - Shen, gping
TI - Post-Buckling and Panel Flutter of Pre-Heated Functionally Graded Plates
T2 - The International Conference on Computational \& Experimental Engineering and Sciences
PY - 2022
VL - 24
IS - 1
SN - 1933-2815
AB - Post-buckling and panel flutter behaviors of ceramic-metal FGM plates are studied for the skins of
supersonic aircrafts. The effects of asymmetric material and temperature distributions, as well as the
aerodynamic loads, on the thermo-mechanical response of FGM plates are discussed using finite
element simulations. The aero-thermo-elastic model is established by using the simple power law
material distribution, the rule of mixture for material effective properties, the nonlinear Fourier
equations of heat conduction, von-Karman strain-displacement nonlinear relations, and the piston
theory for supersonic aerodynamics. The finite element equations are established using the first-order
shear deformable plate elements. The thermal post-buckling equilibrium deflections are calculated
from the reduced-order model, and the flutter stability is furtherly evaluated around these
equilibriums. The post-buckling equilibriums are found asymmetric about the initial position of the
plate, and the critical flutter speed from the post-buckling model is much higher than the linear flutter
speed on the initial position. Numerical results show that the effect of thermal gradient on the postbuckling deflection of FGM plate decreases with the increase of the material gradient index. With the
increase in volume fraction of ceramics (decrease in volume fraction index), the critical flutter
aerodynamic pressure of the ceramic/ metal plate increases. The flutter response amplitude increases
with the increase in volume fraction index.
KW - Functionally graded materials (FGM); panel flutter; post-buckling; supersonic flight
DO - 10.32604/icces.2022.08765