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Numerical Prediction of Failure Load of Scarf-Patch-Repaired CFRP Composite Using Damage Zone Model and Cohesive Zone Model

Numerical Prediction of Failure Load of Scarf-Patch-Repaired CFRP Composite Using Damage Zone... A numerical study was conducted to investigate the tensile behavior of carbon fiber-reinforced polymer (CFRP) scarf-repaired structures with different scarf ratios (1/5, 1/10, 1/20, and 1/30) using two approaches associated with the finite element method (FEM): the damage zone model (DZM) and cohesive zone model (CZM). The experimental data of CFRP laminates with the stacking sequence [45/ − 45/ − 45/0/90/0/45/ − 45/90/0]S, an over-ply layer (additional ply covering the outermost layer of the scarf-patch-repaired structure), and four different scarf ratios were obtained and analyzed. First, an empirical formula was established to describe the mathematical relationship and correlation between the failure load and scarf angle. Subsequently, the strength recovery rate was calculated to evaluate the mechanical performance of the scarf-repaired structures with different scarf ratios. Finally, the experimental data were used to verify the numerical results. The experimental and numerical results exhibited good agreement with each other. The effect of the scarf angle of scarf-patch-repaired composite laminates on the selection of the reference sample in the DZM method and the cohesive parameters in the CZM method were discussed as well. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Aeronautical and Space Sciences Springer Journals

Numerical Prediction of Failure Load of Scarf-Patch-Repaired CFRP Composite Using Damage Zone Model and Cohesive Zone Model

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References (45)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to The Korean Society for Aeronautical & Space Sciences 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
2093-274X
eISSN
2093-2480
DOI
10.1007/s42405-022-00533-9
Publisher site
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Abstract

A numerical study was conducted to investigate the tensile behavior of carbon fiber-reinforced polymer (CFRP) scarf-repaired structures with different scarf ratios (1/5, 1/10, 1/20, and 1/30) using two approaches associated with the finite element method (FEM): the damage zone model (DZM) and cohesive zone model (CZM). The experimental data of CFRP laminates with the stacking sequence [45/ − 45/ − 45/0/90/0/45/ − 45/90/0]S, an over-ply layer (additional ply covering the outermost layer of the scarf-patch-repaired structure), and four different scarf ratios were obtained and analyzed. First, an empirical formula was established to describe the mathematical relationship and correlation between the failure load and scarf angle. Subsequently, the strength recovery rate was calculated to evaluate the mechanical performance of the scarf-repaired structures with different scarf ratios. Finally, the experimental data were used to verify the numerical results. The experimental and numerical results exhibited good agreement with each other. The effect of the scarf angle of scarf-patch-repaired composite laminates on the selection of the reference sample in the DZM method and the cohesive parameters in the CZM method were discussed as well.

Journal

International Journal of Aeronautical and Space Sciences – Springer Journals

Published: Apr 1, 2023

Keywords: CFRP; Scarf-patch-repaired structure; Failure load; DZM; CZM

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