The increasing use of natural fibre composites in at least semi-structural applications along with a demand for a fast and accurate damage detection for quality purpose and in-service reliability promote a need for non-contact non-destructive testing techniques. To this purpose, ultrasound is probably one of the most widely used testing techniques but the need of a coupling fluid like water limits its use with natural fibre composites. In this work, a novel non-contact set-up based on laser excitation of ultrasound and detection with a broadband, air-coupled optical microphone is presented and tested on flax/PLA laminates. This material system has been characterized in terms of quasi-static mechanical properties and low velocity impact response. The outcomes of this study demonstrate the potential of this non-contact and nondestructive system for quality and damage inspection purposes of natural fibre composites.

Impact damage assessment in biocomposites by micro-CT and innovative air-coupled detection of laser-generated ultrasound / Fischer, Balthasar; Sarasini, Fabrizio; Tirillò, Jacopo; Touchard, Fabienne; Chocinski-Arnault, Laurence; Mellier, David; Panzer, Nils; Sommerhuber, Ryan; Russo, Pietro; Papa, Ilaria; Lopresto, Valentina; Ecault, Romain. - In: COMPOSITE STRUCTURES. - ISSN 0263-8223. - 210:(2019), pp. 922-931. [10.1016/j.compstruct.2018.12.013]

Impact damage assessment in biocomposites by micro-CT and innovative air-coupled detection of laser-generated ultrasound

Sarasini, Fabrizio
;
Tirillò, Jacopo;
2019

Abstract

The increasing use of natural fibre composites in at least semi-structural applications along with a demand for a fast and accurate damage detection for quality purpose and in-service reliability promote a need for non-contact non-destructive testing techniques. To this purpose, ultrasound is probably one of the most widely used testing techniques but the need of a coupling fluid like water limits its use with natural fibre composites. In this work, a novel non-contact set-up based on laser excitation of ultrasound and detection with a broadband, air-coupled optical microphone is presented and tested on flax/PLA laminates. This material system has been characterized in terms of quasi-static mechanical properties and low velocity impact response. The outcomes of this study demonstrate the potential of this non-contact and nondestructive system for quality and damage inspection purposes of natural fibre composites.
2019
polymer-matrix composites; natural fibres; low-velocity impact; non-destructive testing; micro-CT
01 Pubblicazione su rivista::01a Articolo in rivista
Impact damage assessment in biocomposites by micro-CT and innovative air-coupled detection of laser-generated ultrasound / Fischer, Balthasar; Sarasini, Fabrizio; Tirillò, Jacopo; Touchard, Fabienne; Chocinski-Arnault, Laurence; Mellier, David; Panzer, Nils; Sommerhuber, Ryan; Russo, Pietro; Papa, Ilaria; Lopresto, Valentina; Ecault, Romain. - In: COMPOSITE STRUCTURES. - ISSN 0263-8223. - 210:(2019), pp. 922-931. [10.1016/j.compstruct.2018.12.013]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1215144
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