Design and optimization of composite sub-stiffened panels. (15th May 2020)

• Record Type: Journal Article
• Authors: Ye, Yaoyao; Zhu, Weidong; Jiang, Junxia; Xu, Qiang; Ke, Yinglin
• Is Part Of: Composite structures. Volume 240(2020)
• Publication Date: 2020-05-15
• Subjects: Composite sub-stiffened panel -- Optimization -- Buckling and post-buckling -- Failure behaviors; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2020.112084
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: This study concerns the buckling and post-buckling performance of composite stiffened panels with sub-stiffening structure subject to compression. The buckling response of the composite stiffened panel is first predicted and verified by experimental data available from the literature. Then sub-stiffeners are introduced into the composite stiffened panel. The distribution and stacking sequence of sub-stiffeners are optimized to improve the critical buckling load without adding weight. Further, to investigate the underlying mechanism of sub-stiffeners involved panels deformation and failure during compressive post-buckling process, different skin-stiffener interfacial parameters are considered. Results show that the introduction of sub-stiffeners to composite T-stiffened panel causes a significant improvement of buckling load (+122.66%) and induces reestablishment of the stress concentrated zone which leads to different local failure forms with different interfacial properties. In addition, the collapse load of sub-stiffened panel becomes more sensitive to interfacial parameters of skin-stiffener interface due to the presence of sub-stiffeners.