The Optimization and Design of Complicated-Surface Panel Based on Automate Fiber Placement

Aiming at the special configurations of the automated fiber placement composite panel and the complex loads, the applicable analysis criteria and failure criteria are screened and perfected. Iso-parametric shell element is used to simulate skin and stiffener. A specific interface element is used to simulate between skin and stiffener. During the analysis process of the buckling, post-buckling and failure of the structure under complex loads, the modified Hashin criterion is used to simulate the longitudinal and transverse failure of the material. The tensile and shear failure criteria are used to simulate the interface between skin and stiffener. With the increase of the number and height of stiffeners, the buckling and post-buckling capacity of double-curvature stiffened panel increases. But the buckling and post-buckling capacity of longitudinal and transverse stiffeners are very close.