The adoption of natural fibres as low-cost fillers in the plastic industry has been assessed for long time and, nowadays they are starting to replace glass fibres in composite structures thanks to their advantages in terms of weight, cost, and environmental (biodegradability) behaviour. Among the others, one of the most application of natural fibre composites is in the manufacturing of honeycomb cores for sandwich panels with an improvement in terms of weight saving as well as in mechanical properties and functional capabilities, such as vibration control, heat and energy dissipation. In this work, a numerical model, able to predict the impact behaviour of natural fibres honeycomb cores, has been assessed. An explicit impact analysis has been conducted and the results have been validated by comparison with experimental data in terms of impact force as a function of impactor displacement. Furthermore, the numerical deformed shapes have been compared with experimental images taken during the impact test. The results have demonstrated the validity and the robustness of the proposed numerical model.

A numerical study on the impact behaviour of a sandwich panel with natural fibres honeycomb core

Riccio A.;
2017

Abstract

The adoption of natural fibres as low-cost fillers in the plastic industry has been assessed for long time and, nowadays they are starting to replace glass fibres in composite structures thanks to their advantages in terms of weight, cost, and environmental (biodegradability) behaviour. Among the others, one of the most application of natural fibre composites is in the manufacturing of honeycomb cores for sandwich panels with an improvement in terms of weight saving as well as in mechanical properties and functional capabilities, such as vibration control, heat and energy dissipation. In this work, a numerical model, able to predict the impact behaviour of natural fibres honeycomb cores, has been assessed. An explicit impact analysis has been conducted and the results have been validated by comparison with experimental data in terms of impact force as a function of impactor displacement. Furthermore, the numerical deformed shapes have been compared with experimental images taken during the impact test. The results have demonstrated the validity and the robustness of the proposed numerical model.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11591/385600
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