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An investigation about stresses and processed zone around crack tip in CFRP plates

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Abstract

Unidirectional carbon fiber reinforced polymers (CFRP) laminates are widely employed in different fields due to their low density combined with high stiffness and strength. However, unlike usual materials, composite laminates may present many different failure mechanisms. Additionally, the stress distribution depends on the material properties due to its anisotropy, making the composite design a hard task. This study deals with a large plate made of CFRP with a central crack subject to uniaxial loading. The main goal of this investigation is to carry out an analysis of the stress distribution and the damaged area around a crack tip. The damaged area, or processed zone, is an important way to evaluate the applicability and limitations of linear elastic fracture mechanics. An analytical closed-form equation is derived using Tsai’s modulus combined with Tsai–Wu failure criterion and compared with finite element simulations. The results show the accuracy of the proposed equation and the influence of the fibers’ orientation on the processed zone shape. Due to Tsai’s modulus application, the stress distribution can be obtained for any single-layered CFRP.

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Acknowledgements

L.L. Vignoli would like to acknowledge the support of the FAPERJ and UFRJ.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Center for Technology and Application of Composite Materials, Federal University of Rio de Janeiro, Macaé, RJ, Brazil

    Lucas Lisbôa Vignoli

  2. CEFET/RJ, Estr. de Adrianópolis, 1317 - Vila Nossa Sra. da Conceicao, Nova Iguaçu, RJ, Brazil

    Arthur Adeodato

  3. Programa de Pós-Graduação em Engenharia Mecânica e Tecnologia de Materiais, (PPEMM), CEFET/RJ, Rua Maracanã, 229, Rio de Janeiro, RJ, Brazil

    Daniel de Macedo Barreto Netto & Paulo Pedro Kenedi

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  1. Lucas Lisbôa Vignoli
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  2. Arthur Adeodato
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  3. Daniel de Macedo Barreto Netto
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  4. Paulo Pedro Kenedi
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Correspondence to Paulo Pedro Kenedi.

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Vignoli, L.L., Adeodato, A., de Macedo Barreto Netto, D. et al. An investigation about stresses and processed zone around crack tip in CFRP plates. J Braz. Soc. Mech. Sci. Eng. 45, 255 (2023). https://doi.org/10.1007/s40430-023-04144-7

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  • DOI: https://doi.org/10.1007/s40430-023-04144-7

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