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The current work presents a
hygrothermal analysis of laminated composite
rhombic hyperbolic paraboloids. The cubic variation in displacement field together with
cross curvature effects of the shell were used to solve the hygrothermal problem. Because
of the parabolic variation of the transverse shear deformation, the shear correction factor
was not necessary in this paper. In the mathematical model, the zero conditions of the
transverse shear stress at the bottom and top of the shell were applied. The nine-noded
curved isoparametric element with seven unknowns in each node was used to implement
the present realistic mathematical model. The implementation of the finite element C
0
(FE)
of the present mathematical model was coded and performed in FORTRAN. The skew
hyperbolic paraboloid on which the hygrothermal analysis was conducted had various
temperatures, ply orientation, curvatures, moisture concentration, boundary conditions and
thickness ratio. The paper shows that with the increase of the skew angle, the non-dimen
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sional deflection decreases, and with the increase of moisture concentration, hygrothermal
load and curvature ratio, the deflection increases. The results of the model presented in
the paper were compared with other results published in the literature and were found to
be consistent with them.
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