| Functionally graded materials (FGM) with high strength and good thermal shock resistance. The superiority, we believe, is caused by the lack of interface, which suppresses the break at the interface and the thermal stress. Furthermore, the excellent wide compositional gradient for the graded structure results in improvement in several types of physical properties. Under the same thermal loading, heat resistance of ceramics is better than that of metals, but if material constant is properly selected, that of FGM can be better than that of ceramics, so superiority of FGM can be best presented.In linear analysis, FGM plates behavior, which bucking, is discussed using numerical method. The linear stability governing equations of FGM thin plates of arbitrary stacking sequence under in-plane compressive loading was established by using variational approach and the minimum potential energy principle in this paper. The buckling problem of FGM plates were studied by using finite element method. A theoretical analysis of FGM plates based on physical neutral surface, stretching-bending coupling effects are decoupled, governing equations and boundary conditions have the simple forms,so analysis and solution procedure of FGM plats are easier and simpler than classical laminated plate based on geometric middle surface.This theory have more merits in the engineering application.The validity and effectiveness of the theory and method presented in this paper are demonstrated by comparing with the solutions obtained by the other existent references. The critical buckling loads parameter of FGM plates with more general boundary conditions subjected to various mechanical loads, which include uniaxial compression, biaxial compression, shear load conditions, are discussed in detail. Parametric studies are also undertaken, and the effects of in-plane forces, volume fraction exponents, and the character of boundary conditions on the buckling characteristics of the plates are also examined. |
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