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Experimental Evaluation of Laminated Carbon Composite Step Lap Repair Through Static and Fatigue Compression Loading

Sreedhara, H and Dineshkumar, H and Ranganath, VR (2021) Experimental Evaluation of Laminated Carbon Composite Step Lap Repair Through Static and Fatigue Compression Loading. [Book Chapter]

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Official URL: https://doi.org/10.1007/978-981-16-0642-7_5


The static compression test is performed on various carbon fiber reinforced plastic (CFRP) epoxy-based laminate panels manufactured with the vacuum enhanced resin infusion technology (VERITy) process. These tests are conducted for establishing the compression strength and evaluation of the step-lap repaired method effectiveness. The barely visible impact damage (BVID) is simulated experimentally by impacting with low energy. The response of the pristine, impact-damaged, and step-lap repaired composite panels are captured experimentally through the online strain measurement during the testing at various locations. The predicted strain response from the finite element analysis is validated with that of the experiment for all of the specimen configuration. Reasonable good agreement is observed between the predicted and the experimental strain values in terms of their magnitude and the trend. It is observed that both of the strength and the stiffness are regained in the composite panels after the step-lap repair scheme is implemented. Constant amplitude fatigue behavior of pristine and step-lap repaired composite panels are tested under compression-compression fatigue loads. It is observed that the stiffness of both of these panels is not significantly degraded over a testing period of million fatigue cycles. © 2021, Springer Nature Singapore Pte Ltd.

Item Type: Book Chapter
Publication: Engineering Materials
Series.: Engineering Materials
Publisher: Springer Science and Business Media B.V.
Additional Information: The copyright for this article belongs to Springer Science and Business Media B.V.
Keywords: Carbon carbon composites; Carbon fiber reinforced plastics; Compression testing; Epoxy resins; Fatigue of materials; Fatigue testing; Laminated composites; Repair; Stiffness, Carbon-fibre reinforced plastics; Composite panels; Composite repair; Constant amplitude; Constant amplitude fatigue; Finite element analyse; Static compression; Step lap; Step-lap composite repair; Verity process, Finite element method
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 23 May 2022 05:42
Last Modified: 25 May 2022 06:39
URI: https://eprints.iisc.ac.in/id/eprint/71702

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