Buckling performance analysis and reliability optimization of composite corrugated plate under shear loading

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (19) : 7-14.

ZHENG Yuning 1 QIU Zhiping 1 YUAN Kaihua 2

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Abstract

Composite corrugated plates are widely used in the wall web of aircraft wing and the buckling reliability under shear loading is a factor that should be considered during the design of corrugated plates. Based on the equivalent models of flexural and extensional rigidities, an analytical method of critical shear buckling loads of composite corrugated plates is derived by utilizing Ritz method and the principle of minimum potential energy. The uncertainties in composite structural parameters and external load are fully considered and quantified by interval vectors. By virtue of the vertex solution theorem, the response range of buckling factor could be predicted and the interval analytical method of buckling reliability subjected to shear loading is established. The interval possible degree is adopted to describe the reliability of shear buckling. An interval reliability optimization model to address the effects of parametric uncertainties is proposed aiming at composite corrugated plates. Numerical examples indicate the results by both the presented method and FEM agree very well and the optimal results demonstrate the effectiveness of proposed interval reliability optimization model and algorithm.

Key words

composite materials / corrugated plate / buckling / uncertainty / interval analysis / reliability optimization

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ZHENG Yuning 1 QIU Zhiping 1 YUAN Kaihua 2. Buckling performance analysis and reliability optimization of composite corrugated plate under shear loading[J]. Journal of Vibration and Shock, 2016, 35(19): 7-14

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