CYCLIC FATIGUE BEHAVIOR OF WOVEN HEMP/EPOXY COMPOSITE: DAMAGE ANALYSIS

Davi Vasconcellos (1) , Fabienne Touchard (1) , Laurence Chocinski-Arnault (1)

1 PPrime [Poitiers] - Institut Pprime [UPR 3346]

This paper provides results from the characterization of cyclic fatigue behavior of a woven hemp/epoxy composite, constituted by seven layers of hemp fabric and an epoxy matrix. Two types of fabric orientation are tested: [0°/90°]7 and [±45°]7. The cyclic fatigue tests are performed with a frequency of 1 Hz, a stress ratio of 1% (R=0.01) and with different levels of maximum loading. The Acoustic Emission (AE) technique has been applied to measure spatial and temporal positions of cracks and failures during fatigue life, in order to track the damage process. Those results where completed with X-ray microtomography observations and infrared (IR) measurements.

Mots clés: fatigue; natural fiber; woven composite damage; acoustic emission

Domaines: Mécanique des matériaux [physics.class-ph]; Mécanique des matériaux [physics.class-ph]

Davi Vasconcellos, Fabienne Touchard, Laurence Chocinski-Arnault. CYCLIC FATIGUE BEHAVIOR OF WOVEN HEMP/EPOXY COMPOSITE: DAMAGE ANALYSIS. 15TH EUROPEAN CONFERENCE ON COMPOSITE MATERIALS, Jun 2012, Venise, Italy. ⟨hal-00796853⟩