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Numerical predictions of intralaminar and interlaminar damage in thin composite shells subjected to impact loads
https://orcid.org/0000-0002-5223-5309
Abstract This paper investigates the impact dynamics of thin semicylindrical woven composite laminate shells, with a particular focus on understanding the influence of thickness. Utilizing the finite element (FE) method, the study evaluates both intralaminar and interlaminar damage associated with the impact response. The findings show that the implementation of the explicit FE method, along with a continuum damage mechanics model, for the intralaminar damage, and a surface-based cohesive model, for the interlaminar damage, may be used to correctly predict the load histories, as well as the maximum impact force, maximum displacement, contact time and impact bending stiffness (IBS). The numerical predictions reproduce well the linear response of the maximum impact force and maximum displacement to the thickness variation, as well as the 2nd order polynomial curve of the IBS, with errors ranging from 2.7% to 15.9%. Moreover, the damage areas and the effect of thickness on the damage severity were accurately replicated. These results’ validation enables the prediction of the energy histories and the ensuing energy dissipation forms. According to the findings, the intralaminar damage is around 5 times more significant than the other energy dissipation forms. The accuracy of the simulation creates the possibility for more impact investigations using a similar numerical approach, reducing the expenditures of experimental testing.
Highlights Investigation of the impact dynamics on composite shells using the explicit finite element method. Numerical predictions of intralaminar damage using a continuum damage mechanics model. Numerical predictions of interlaminar damage using a surface-based cohesive model. Prediction of energy dissipation forms for different thicknesses.
Numerical predictions of intralaminar and interlaminar damage in thin composite shells subjected to impact loads
https://orcid.org/0000-0002-5223-5309
Abstract This paper investigates the impact dynamics of thin semicylindrical woven composite laminate shells, with a particular focus on understanding the influence of thickness. Utilizing the finite element (FE) method, the study evaluates both intralaminar and interlaminar damage associated with the impact response. The findings show that the implementation of the explicit FE method, along with a continuum damage mechanics model, for the intralaminar damage, and a surface-based cohesive model, for the interlaminar damage, may be used to correctly predict the load histories, as well as the maximum impact force, maximum displacement, contact time and impact bending stiffness (IBS). The numerical predictions reproduce well the linear response of the maximum impact force and maximum displacement to the thickness variation, as well as the 2nd order polynomial curve of the IBS, with errors ranging from 2.7% to 15.9%. Moreover, the damage areas and the effect of thickness on the damage severity were accurately replicated. These results’ validation enables the prediction of the energy histories and the ensuing energy dissipation forms. According to the findings, the intralaminar damage is around 5 times more significant than the other energy dissipation forms. The accuracy of the simulation creates the possibility for more impact investigations using a similar numerical approach, reducing the expenditures of experimental testing.
Highlights Investigation of the impact dynamics on composite shells using the explicit finite element method. Numerical predictions of intralaminar damage using a continuum damage mechanics model. Numerical predictions of interlaminar damage using a surface-based cohesive model. Prediction of energy dissipation forms for different thicknesses.
Numerical predictions of intralaminar and interlaminar damage in thin composite shells subjected to impact loads
https://orcid.org/0000-0002-5223-5309
Abstract This paper investigates the impact dynamics of thin semicylindrical woven composite laminate shells, with a particular focus on understanding the influence of thickness. Utilizing the finite element (FE) method, the study evaluates both intralaminar and interlaminar damage associated with the impact response. The findings show that the implementation of the explicit FE method, along with a continuum damage mechanics model, for the intralaminar damage, and a surface-based cohesive model, for the interlaminar damage, may be used to correctly predict the load histories, as well as the maximum impact force, maximum displacement, contact time and impact bending stiffness (IBS). The numerical predictions reproduce well the linear response of the maximum impact force and maximum displacement to the thickness variation, as well as the 2nd order polynomial curve of the IBS, with errors ranging from 2.7% to 15.9%. Moreover, the damage areas and the effect of thickness on the damage severity were accurately replicated. These results’ validation enables the prediction of the energy histories and the ensuing energy dissipation forms. According to the findings, the intralaminar damage is around 5 times more significant than the other energy dissipation forms. The accuracy of the simulation creates the possibility for more impact investigations using a similar numerical approach, reducing the expenditures of experimental testing.
Highlights Investigation of the impact dynamics on composite shells using the explicit finite element method. Numerical predictions of intralaminar damage using a continuum damage mechanics model. Numerical predictions of interlaminar damage using a surface-based cohesive model. Prediction of energy dissipation forms for different thicknesses.
Numerical predictions of intralaminar and interlaminar damage in thin composite shells subjected to impact loads
Ferreira, L.M. (author) / Coelho, C.A.C.P. (author) / Reis, P.N.B. (author)
Thin-Walled Structures ; 192
2023-08-28
Article (Journal)
Electronic Resource
English
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