Study of plant fibre composites with damage induced by laser and mechanical impacts

Paweł H. Malinowski (1) , Luigi Sorrentino (2) , Davi Silva De Vasconcellos (3) , Laurent Berthe (4) , Pedro Pascual Gonzalez (3) , Laurence Chocinski-Arnault (5) , Michel Boustié (5) , Fabienne Touchard (5) , Wiesław M. Ostachowicz (1)

1 PAN - Polska Akademia Nauk = Polish Academy of Sciences = Académie polonaise des sciences
2 Istituto per i Polimeri, Compositi e Biomateriali (IPCB)
3 PPrime [Poitiers] - Institut Pprime [UPR 3346]
4 PIMM - Laboratoire Procédés et Ingénierie en Mécanique et Matériaux
5 ENDO - ENDOmmagement et durabilité [Institut Pprime]

Polymer composite materials provide good strength to weight ratio and tailored mechanical properties thanks to the reinforcing fibres. Until recently, the need for taking into account the whole life cycle of a composite structure was neglected and only the service aspects were important. Today, the designers of a new composite structure have to take into account the environmental aspects from the sustainability of raw materials to the management of end life products. There are recycling issues related to the most popular composites. A solution for the recycling issue can be sought in green composites with reinforcing fibre originating from plants. The behaviour of eco-composites, when subjected to laser or mechanical impact loadings, is not well known yet. Short fibre composites were made with spruce fibres. Another set of samples was made of flax fibres. Also a woven hemp fabric-based eco-composite was investigated. A fully synthetic woven composite was used for comparison with green composites. Mechanical impacts were performed by means of a falling dart impact testing machine. Laser impacts were made with high power laser source. Four assessment techniques were employed in order to analyse and compare impact damage. Damage detection thresholds for each material and technique were obtained.

Mots clés: Impact damage; Vibrometry; Laser shocks; NDT; Green composites; Terahertz spectroscopy

Domaines: Matériaux

Paweł H. Malinowski, Luigi Sorrentino, Davi Silva De Vasconcellos, Laurent Berthe, Pedro Pascual Gonzalez, et al.. Study of plant fibre composites with damage induced by laser and mechanical impacts. Composites Part B: Engineering, 2018, 152, pp.209-219. ⟨10.1016/j.compositesb.2018.07.004⟩. ⟨hal-01900656⟩