Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 163, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2022.107158
Keywords
Damping; Natural fibers; Biocomposite; Microstructural analysis
Funding
- Bio-Based Industries Joint Undertaking under the European Union [744349-SSUCHY]
- Region Bourgogne-Franche-Comte [2016Y-06124D-BCOMP]
- EUR EIPHI Graduate school, France [ANR-17-EURE-0002]
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This study characterizes the dynamic mechanical properties of flax/GreenPoxy composites at the microscale using dynamic grid nanoindentation technique, and proposes two loading protocols. The results show that the experimental protocols have a significant effect on the loss factor while they do not affect the storage modulus significantly. Additionally, the grid nanoindentation technique provides an interesting map of the damping contribution of the various components in the cross-section of the composites.
Damping properties of plant fiber composites have been quite widely investigated based on macroscale techniques. Considering their heterogeneous and hierarchical microstructure, it is also necessary to study their damping behavior at the microscale to provide better insight into the dissipation origins and mechanisms. This article proposes a characterization of the dynamic mechanical properties of flax/GreenPoxy composites at microscale using dynamic grid nanoindentation technique. Two loading protocols are used: the classical Continuous Stiffness Measurement method (CSM) and a new method called Constant Amplitude Measurement method (CAM). Results show experimental protocols (CAM or CSM) do not have significant effect on storage modulus while they significantly affect the loss factor. The grid nanoindentation technique also provides an interesting map of the viscoelastic properties at the microscale in the cross-section of the composites and the damping contribution of the various components are highlighted.
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