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Title: Comparative study of composite scarf and strap joints for equivalent repair signature under uniaxial tension
Authors: Srinivasan, Dharun Vadugappatty
Padma, S. Ravisankar
Idapalapati, Sridhar
Keywords: Engineering::Mechanical engineering
Issue Date: 2022
Source: Srinivasan, D. V., Padma, S. R. & Idapalapati, S. (2022). Comparative study of composite scarf and strap joints for equivalent repair signature under uniaxial tension. Composites Part A: Applied Science and Manufacturing, 158, 106950-.
Journal: Composites Part A: Applied Science and Manufacturing
Abstract: Scarf joints are preferred in aerospace composite repairs that offer better strength, flushed surface and nearly uniform shear and peel stress distribution along the bond length. However, a shallow scarf angle repair of 2° to 3° as practiced requires significant parent material removal thus increasing the repair signature and cost. Scarfing the single side accessible, multi-layered composite structures is difficult. Herein, different repair designs based on 8.6° scarf, thin CFRP strap (0.5 mm and 1.1 mm), 0.5 mm thin Ti-6Al-4V straps (with and without pins) are used in bonding CFRP composites, their repair strength is measured through tensile testing. Results show that the failure load of the scarf and Ti-6Al-4V strap joints are similar implicating that the higher scarf angle designs can be replaced with Ti-6Al-4V straps for better repair efficacy. Failure analysis depicts that delamination due to the inner edge peel stresses is a critical failure mode of the strap repaired joints.
ISSN: 1359-835X
DOI: 10.1016/j.compositesa.2022.106950
Rights: © 2022 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

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