Structural Engineering and Mechanics

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A higher-order beam model for the snap-buckling analysis of FG pipes conveying fluid

  • Ding, Hao-Xuan (College of Mechanical and Vehicle Engineering, Chongqing University) ;
  • She, Gui-Lin (College of Mechanical and Vehicle Engineering, Chongqing University)
  • Received : 2021.05.21
  • Accepted : 2021.07.26
  • Published : 2021.10.10
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Abstract

The snap buckling of the FG curved pipes conveying fluid has not been reported due to the existing research on the snap-buckling problem. Therefore, the purpose of this paper is to explore this issue. First, we adopt a new high-order shear theory model and consider the thermal and geometric nonlinearity effects, and assume that the density and modulus of elasticity of the liquid are independent of temperature. Based on the generalized variational principle, the governing equation of the FG curved pipes conveying fluid is derived. Then, we assume that the FG curved pipes conveying fluid has simply supported boundary or fixed supported boundary conditions, and use the two step perturbation method to obtain the expression of the relationship between load and deflection. Then, we investigate the influence of boundary conditions, shear deformation, temperature variation, functional gradient index parameters, liquid flow velocity and geometry size on the snap buckling problems of the FG curved pipes conveying fluid. The results show that these factors have significant influence on the fluid-structure interaction problems.

Keywords

References

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