Effect of hygrothermal environment on free vibration characteristics of FGM plates by finite element approach

In this work the numerical investigations are carried out on free vibrations of FGM plates in hygrothermal environment. FGM plate form based on third order shear deformation theory is considered. FGM plate material properties vary the in the thickness direction using simple power law. A four noded rectangular element with 7 DOF per node is used in this analysis. The present method results are compared with results available in literature to assess its efficiency. The investigation is performed on natural frequencies of FGM plates under temperature and moisture conditions. The outcomes show that the vibration characteristics are greatly influenced with the hygrothermal parameters concerned in the study.