Short Communication

Comparison of damage behaviour of different plant fibre composites under laser impact loading

¹ Institut PPRIME, CNRS-ENSMA-Université de Poitiers, 1 Av. Clément Ader, B.P. 40109, 86961 Futuroscope, France
fabienne.touchard@ensma.fr
² PIMM, CNRS-ENSAM Paristech, 151 Bd de l’Hopital, 75013 Paris Cedex, France
³ Polish Academy of Sciences, Institute of Fluid-Flow Machinery, 14 Fiszera St., 80–231 Gdansk, Poland

Received: 20 February 2015
Accepted: 3 March 2015

Abstract

The high strain rate behaviour of the eco-composites, when submitted to laser impact loading, is not well known yet. Crucial questions are still open: influence of plant fiber length and distribution on the composite impact behaviour, types of damage induced by impact loading, the way the failure occurs, etc. We present the very first results of a collaborative research involving the institutions PPRIME- Poitiers and PIMM-Paris, and IMP PAN-Gdansk-Poland. A comparison of laser shock induced damage is realised, based on observations of sample back faces for several types of eco-composites. Spallation, residual blister and inside delamination, depending on the fibre length in tested composites have been observed. The ability of the Terahertz technique for internal damage detection is demonstrated.