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A practical technique to assess the influence of the misalignment angle of unidirectional composite fibers under compressive load

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Abstract

This work employs a micromechanical theory and kinematic relationships to describe the displacement field in individual unidirectional composite plies. The technique relies on an incremental approach where the misalignment angle of fibers is the main variable in the analysis. Upon convergence at a certain loading level, stresses and strains are evaluated in the fibers and matrix using micromechanics, and a specific failure criterion is applied. The Ramberg–Osgood relations are used to correct degraded mechanical properties of the resin in the nonlinear regime. The use of a 2D finite element model with a 3° initial misalignment angle of fibers, showed a good approach to complement the problem solution. The Hashin-Rotem failure criterion and experimental data obtained by Matsuo (Compos Part A: Appl Sci Manuf, 93:117-125, 2017) are used to validate the technique. It is observed that the numerical and experimental results obtained correlate well.

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Funding

Partial financial support was received from agency CNPq (Grant 310742/2020-0).

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Authors and Affiliations

  1. Department of Mechanical Engineering, Instituto Tecnológico de Aeronáutica (ITA), Praça Marechal Eduardo Gomes, 50, São José Dos Campos, SP, 12228-900, Brazil

    Alfredo Rocha de Faria & Francisco Kioshi Arakaki

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  1. Alfredo Rocha de Faria
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  2. Francisco Kioshi Arakaki
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Correspondence to Alfredo Rocha de Faria.

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de Faria, A.R., Arakaki, F.K. A practical technique to assess the influence of the misalignment angle of unidirectional composite fibers under compressive load. J Braz. Soc. Mech. Sci. Eng. 45, 246 (2023). https://doi.org/10.1007/s40430-023-04137-6

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  • DOI: https://doi.org/10.1007/s40430-023-04137-6

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