Hierarchical-level failure analysis for CFRC lattice stiffened panel. (February 2023)

• Record Type: Journal Article
• Authors: Bao, Wenyi; Li, Ming; An, Xiyue; Han, Han; Lou, Yunfeng; Fan, Hualin
• Is Part Of: Thin-walled structures. Volume 183(2023)
• Publication Date: 2023-02
• Subjects: Hierarchical-level failure analysis -- Lattice structure -- Knock-down factor; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2022.110354
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: A hierarchical-level failure analysis method from carbon fiber reinforced composite (CFRC), unit-cell lattice to lattice stiffened component was developed to predict the failure load of lattice stiffened panels. A nondestructive method was applied to identify the composite parameters of lattice ribs. Axial compression experiments were carried out to reveal the failure pattern and load of unit-cell lattice and lattice-stiffened panels. Compared with the standard unidirectional laminate strength, these component failure analyses suggest knock-down factors (KDFs) to include the attenuation effect of the rib node intersection. The failure loads of CFRC lattice stiffened panels were predicted by the KDFs. The research lays a good foundation to design and manufacture large-sized CFRC lattice structures. Highlights: A hierarchical-level failure analysis method for lattice stiffened structure was proposed. The method is based on hierarchical-level testing and data processing. The hierarchical-level failure analysis method can control predication error within 10%.