Design and optimization of bonded patch repairs of laminated composite structures. (May 2015)

• Record Type: Journal Article
• Authors: Gong, Xiao-Jing; Cheng, Pengcheng; Aivazzadeh, Shahram; Xiao, Xinran
• Is Part Of: Composite structures. Volume 123(2015)
• Page Start: 292
• Page End: 300
• Publication Date: 2015-05
• Subjects: Composite structures -- Bonded patch repairs -- Design and optimization -- Finite element analysis (FEA); Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2014.12.048
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: The present study proposes a method for design optimization of external patched repairs. The tensile behavior of notched specimens with patched repair was studied using finite element analysis and compared with experimental results. It was found that high stress concentrations along the transverse edges of circular patches and/or at the longitudinal edges of the hole leads to early damage initiation in the parent plate. The damage initiation site and its propagation depend on the patch in-plane stiffness. The optimal patch design can be characterized by a strength ratio R ∗ . The overall design of the patch repair can be considered using a dimensionless design parameter K .