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Use of Acoustic Emission Monitoring to Follow Durability of Flax and Carbon Fibre Reinforced Polymers Under Hygrothermal Ageing

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CIGOS 2021, Emerging Technologies and Applications for Green Infrastructure

Part of the book series: Lecture Notes in Civil Engineering ((LNCE,volume 203))

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Hand lay-up Fibre Reinforced Polymers (FRP), made of either carbon or flax textiles, were considered in this study and were subjected to water immersion at 40 ℃ over 24 weeks. Tensile tests were carried out periodically to assess the mechanical properties of the composites and Acoustic Emission (AE) monitoring was simultaneously realized to characterize the different microstructural damage mechanisms during loading. Maximum force per unit width, stiffness and ultimate strain were determined based on tensile testing data whereas frequency features and number of events were extracted and cumulated from AE signals. The obtained results showed that the mechanical properties of composites were significantly reduced meanwhile a modification of failure mode over 24 weeks was observed. Moreover AE signals analysis allowed a quantification of the level of damage. It also provided a discrimination of the different damage mechanisms and clarified how each mechanism contributed to failure.

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This research was performed with the financial support of the ANR MICRO project and from 911 doctoral scholarship by the MOET of Viet Nam for the first author.

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Correspondence to Chuyen Nguyen Viet .

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Nguyen Viet, C., Reboul, N., Curtil, L. (2022). Use of Acoustic Emission Monitoring to Follow Durability of Flax and Carbon Fibre Reinforced Polymers Under Hygrothermal Ageing. In: Ha-Minh, C., Tang, A.M., Bui, T.Q., Vu, X.H., Huynh, D.V.K. (eds) CIGOS 2021, Emerging Technologies and Applications for Green Infrastructure. Lecture Notes in Civil Engineering, vol 203. Springer, Singapore.

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