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Analysis of the critical buckling loads of composite corrugated plates under nonlinearly distributed compressive loads accounting for flexural-twist coupling

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Abstract

In this study, an analytical method is proposed for the determination of the critical buckling loads of composite corrugated plates under nonlinearly distributed compressive loads. The composite corrugated plate is treated both as an original corrugated plate model and as a simplified anisotropic flat plate model with equivalent stiffness. By means of the equivalent energy and force methods, the equivalent flexural stiffness including the flexural-twist coupling stiffness of the original corrugated plate is obtained. We derive the critical buckling loads of composite corrugated plates under nonlinearly distributed compressive loads accounting for flexural-twist coupling based upon the large deflection equation of an anisotropic plate and the obtained equivalent flexural stiffness. The influence of flexural-twist coupling on the critical buckling loads is investigated for both trapezoidal and sinusoidal composite corrugated plates with different stacking sequences. Numerical examples demonstrate that the critical buckling loads obtained by the proposed method agree well with those calculated by the finite-element method. In addition, it is found that the flexural-twist coupling stiffness should be taken into account in the buckling analysis of composite corrugated plates.

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Correspondence to Yuning Zheng.

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Zheng, Y., Qiu, Z. Analysis of the critical buckling loads of composite corrugated plates under nonlinearly distributed compressive loads accounting for flexural-twist coupling. Acta Mech 227, 3407–3428 (2016). https://doi.org/10.1007/s00707-016-1668-4

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  • DOI: https://doi.org/10.1007/s00707-016-1668-4

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