# Nonlinear flexural analysis of laminated composite flat panel under hygro-thermo-mechanical loading

• Kar, Vishesh R. (Department of Mechanical Engineering, National Institute of Technology) ;
• Mahapatra, Trupti R. (School of Mechanical Engineering, KIIT University) ;
• Panda, Subrata K. (Department of Mechanical Engineering, National Institute of Technology)
• Accepted : 2015.04.02
• Published : 2015.10.25

#### Abstract

In this article, large amplitude bending behaviour of laminated composite flat panel under combined effect of moisture, temperature and mechanical loading is investigated. The laminated composite panel model has been developed mathematically by introducing the geometrical nonlinearity in Green-Lagrange sense in the framework of higher-order shear deformation theory. The present study includes the degraded composite material properties at elevated temperature and moisture concentration. In order to achieve any general case, all the nonlinear higher order terms have been included in the present formulation and the material property variations are introduced through the micromechanical model. The nonlinear governing equation is obtained using the variational principle and discretised using finite element steps. The convergence behaviour of the present numerical model has been checked. The present proposed model has been validated by comparing the responses with those available published results. Some new numerical examples have been solved to show the effect of various parameters on the bending behaviour of laminated composite flat panel under hygro-thermo-mechanical loading.

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